{"id":608,"date":"2023-03-23T10:35:07","date_gmt":"2023-03-23T10:35:07","guid":{"rendered":"http:\/\/www.gislxz.com\/?p=608"},"modified":"2023-03-29T16:50:32","modified_gmt":"2023-03-29T16:50:32","slug":"gdal-1","status":"publish","type":"post","link":"https:\/\/www.gislxz.com\/index.php\/2023\/03\/23\/gdal-1\/","title":{"rendered":"GDAL\u5b66\u4e60\u7b14\u8bb0\uff081\uff09"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u524d\u8a00<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">gdal\u5e93\u662f\u4ec0\u4e48\uff1f<a href=\"https:\/\/gdal.org\/\" target=\"_blank\"  rel=\"nofollow\" >gdal\u7684\u5b98\u7f51<\/a>\u4e0a\u662f\u8fd9\u4e48\u5199\u7684\uff1aGDAL \u662f\u4e00\u4e2a\u7528\u4e8e\u6805\u683c\u548c\u77e2\u91cf\u5730\u7406\u7a7a\u95f4\u6570\u636e\u683c\u5f0f\u7684\u8f6c\u6362\u5668\u5e93\uff0c\u7531\u5f00\u6e90<a href=\"http:\/\/www.osgeo.org\/\" target=\"_blank\"  rel=\"nofollow\" >\u5730\u7406\u7a7a\u95f4\u57fa\u91d1\u4f1a<\/a>\u6839\u636e MIT \u98ce\u683c\u7684\u5f00\u6e90<a href=\"https:\/\/gdal.org\/license.html#license\" target=\"_blank\"  rel=\"nofollow\" >\u8bb8\u53ef\u8bc1<\/a>\u53d1\u5e03\u3002\u4f5c\u4e3a\u4e00\u4e2a\u5e93\uff0c\u5b83\u5411\u8c03\u7528\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u6240\u6709\u652f\u6301\u7684\u683c\u5f0f\u7684\u5355\u4e2a\u5149\u6805\u62bd\u8c61\u6570\u636e\u6a21\u578b\u548c\u5355\u4e2a\u5411\u91cf\u62bd\u8c61\u6570\u636e\u6a21\u578b\u3002\u5b83\u8fd8\u5e26\u6709\u5404\u79cd\u6709\u7528\u7684\u547d\u4ee4\u884c\u5b9e\u7528\u7a0b\u5e8f\uff0c\u7528\u4e8e\u6570\u636e\u8f6c\u6362\u548c\u5904\u7406\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8b\u5b9e\u4e0agdal\u5df2\u7ecf\u6210\u4e3a\u4e86gis\u884c\u4e1a\u7684\u4e00\u79cd\u6807\u51c6\u548c\u57fa\u77f3\uff0carcgis\uff0cqgis\u7b49gis\u8f6f\u4ef6\u65e0\u4e0d\u5728\u5e95\u5c42\u4f7f\u7528\u4e86gdal\u5e93\uff08\u53ef\u80fd\u5bf9gdal\u5e93\u8fdb\u884c\u4e86\u4e00\u5b9a\u4fee\u6539\uff09\u3002gdal\u5e93\u672c\u8eab\u4e5f\u652f\u6301\u5404\u79cd\u8bed\u8a00\u7684\u8c03\u7528\uff0c\u7559\u51fa\u4e86\u4f17\u591aapi\u63a5\u53e3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f5c\u4e3a\u4e00\u4e2a\u5730\u4fe1\uff08\u9065\u611f\uff09\u4e13\u4e1a\u5b66\u751f\uff0c\u5728\u6211\u7684\u5b66\u4e60\u7ecf\u5386\u4e2d\uff0c\u7b2c\u4e00\u6b21\u63a5\u89e6gdal\u5e93\u662f\u5728\u5927\u4e8c\u7684\u4e00\u6b21gis\u4e8c\u6b21\u5f00\u53d1\u5927\u8d5b\u4e2d\uff0c\u6211\u9700\u8981\u53bb\u5bf9\u6805\u683c\u56fe\u50cf\u8fdb\u884c\u4e00\u4e2aTDVI\u6307\u6570\u7684\u63d0\u53d6\uff0c\u9700\u8981\u5728python\u73af\u5883\u4e2d\u4f7f\u7528gdal\u5e93\u53bb\u8bfb\u53d6\u4e00\u526ftiff\u683c\u5f0f\u7684\u536b\u661f\u5f71\u50cf\u5e76\u8f93\u51fa\u4e00\u4e2atiff\u7ed3\u679c\u7684\u5f71\u50cf\uff0c\u5e76\u4fdd\u6301\u539f\u6709\u7684\u5750\u6807\u7cfb\u4fe1\u606f\u4e0d\u4e22\u5931\uff0c\u56e0\u6b64\u4e0d\u80fd\u4f7f\u7528opencv\u7b49\u5e93\u628a\u536b\u661f\u56fe\u50cf\u5f53\u666e\u901a\u56fe\u50cf\u6253\u5f00\uff08\u4f1a\u4e22\u5931\u5750\u6807\u4fe1\u606f\uff09\u3002\u4e0d\u5f97\u4e0d\u8bf4\u4f7f\u7528python\u8c03\u5305\u771f\u7684\u5f88\u65b9\u4fbf\uff0c\u90a3\u4e2a\u65f6\u5019\u6839\u672c\u5c31\u6ca1\u60f3\u8fc7\u4e3a\u4ec0\u4e48\u8981\u7528c++\u53bb\u5b9e\u73b0\u3002\u4f46\u662f\u5728\u5b9e\u73b0\u7b97\u6cd5\u540e\u60f3\u6253\u5305\u6210exe\u7684\u65f6\u5019\u624d\u6df1\u523b\u4f53\u4f1a\u5230\u4e86python\u7684\u75db\u70b9\uff0c\u4f7f\u7528pyinstaller\u6253\u5305\u65f6\u4f1a\u5c06\u6574\u4e2apython\u73af\u5883\u9644\u5e26\u7b2c\u4e09\u65b9\u5e93\u5168\u90e8\u6253\u5305\uff0c\u7ed3\u679c\u5c31\u662f\u751f\u6210\u7684exe\u4f53\u79ef\u6781\u5927\uff0c\u8fd0\u884c\u6781\u6162\uff0c\u5c24\u5176\u5f53\u4f7f\u7528\u5230numpy\u548cpandas\u7b49\u79d1\u5b66\u8ba1\u7b97\u5e93\u65f6\uff0c\u8fd0\u884c\u65f6\u8981\u8017\u8d39\u51e0\u5206\u949f\u53bb\u521d\u59cb\u5316\u3002\u8fd9\u5c31\u4e0d\u5f97\u4e0d\u63d0\u5230\u90a3\u4e2a\u8001\u751f\u5e38\u8c08\u7684\u95ee\u9898\uff1apython\u548cc++\u9009\u54ea\u4e2a\u8bed\u8a00\u597d\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Python vs C++<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u89c9\u5f97\u5173\u4e8e\u54ea\u4e2a\u8bed\u8a00\u95ee\u9898\u597d\u7684\u95ee\u9898\u5176\u5b9e\u662f\u5f88\u6d41\u6c13\u7684\uff0c\u6bcf\u4e2a\u8bed\u8a00\u6709\u5b83\u7684\u4f18\u70b9\u548c\u77ed\u5904\uff0c\u6839\u636e\u5b9e\u9645\u7684\u60c5\u51b5\u548c\u573a\u666f\u9009\u62e9\u5408\u9002\u7684\u8bed\u8a00\u53bb\u505a\u5c31\u597d\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u4e00\u4e2a\u5730\u5b66\u800c\u975e\u8ba1\u7b97\u673a\u7684\u5b66\u751f\uff0c\u6211\u89c9\u5f97\u672c\u79d1\u65f6\u5c31\u628apython\u7528\u597d\u7528\u719f\u5c31\u5df2\u7ecf\u5f88\u597d\u4e86\uff0c\u6bd5\u7adf\u672c\u79d1\u9636\u6bb5\u4e0d\u4f1a\u63a5\u89e6\u5230\u4ec0\u4e48\u5b9e\u9645\u9879\u76ee\uff0c\u5f88\u5c11\u6d89\u53ca\u5230\u6253\u5305\uff0c\u90e8\u7f72\u7b49\u5de5\u7a0b\u95ee\u9898\u3002\u5f88\u591a\u65f6\u5019\u5c31\u662f\u9762\u5411\u6570\u636e\u7684\uff0c\u8d1f\u8d23\u5206\u6790\u7684\uff0c\u8f93\u51fa\u4e00\u4e2a\u77e2\u91cf\u6216\u6805\u683c\u6216\u7edf\u8ba1\u7684\u7ed3\u679c\uff0c\u5199\u4e2a\u5c0f\u8bba\u6587\/\u62a5\u544a\u5c31\u5b8c\u4e8b\u4e86\uff0c\u53e6\u4e00\u65b9\u9762\u672c\u79d1\u65f6\u95f4\u6709\u9650\uff0c\u5b66\u4e60c++\u8fd9\u79cd\u590d\u6742\u6df1\u5965\u7684\u8bed\u8a00\u6709\u65f6\u5019\u771f\u7684\u6765\u4e0d\u53ca\uff08\u5bf9\u5927\u90e8\u5206\u5b66\u751f\u6765\u8bf4\uff0c\u5149\u662fc++\u57fa\u7840\u53ef\u80fd\u5c31\u8981\u82b1\u4e00\u5e74\u4ee5\u4e0a\u65f6\u95f4\u6765\u521d\u6b65\u638c\u63e1\uff0c\u4e4b\u540e\u66f4\u8981\u82b1\u6570\u5e74\u65f6\u95f4\u6765\u5b9e\u8df5\uff0c\u8e29\u5751\uff09\u3002\u518d\u52a0\u4e0a\u8fd9\u51e0\u5e74\u6df1\u5ea6\u5b66\u4e60\u5b9e\u5728\u662f\u592a\u706b\u4e86\uff0c\u4e0d\u7ba1\u4f60\u662f\u505a\u4ec0\u4e48\u7684\u90fd\u5f97\u61c2\u70b9\u6df1\u5ea6\u5b66\u4e60\uff0c\u56e0\u6b64\u672c\u79d1\u65f6\u5019\u8fd8\u662f\u5f97\u5b66\u70b9python\uff0c\u8c03\u8c03pytorch\/paddle\/tf\u7b49\u6846\u67b6\u5bf9\u6df1\u5ea6\u5b66\u4e60\u6709\u4e2a\u57fa\u672c\u7684\u4e86\u89e3\uff0c\u73b0\u5728\u4fdd\u7814\u8003\u7814\u9762\u8bd5\u7684\u65f6\u5019\u8001\u5e08\u4e5f\u592a\u559c\u6b22\u95ee\u6709\u6ca1\u6709\u6df1\u5ea6\u5b66\u4e60\u7ecf\u9a8c\u4e86\uff0c\u4e2a\u4eba\u8ba4\u4e3a\u6df1\u5ea6\u5b66\u4e60\u771f\u7684\u662f\u672c\u79d1\u65f6\u6027\u4ef7\u6bd4\u6700\u9ad8\u7684\u5b66\u4e60\u65b9\u5411\uff0c\u5f53\u7136\u7b49\u7814\u7a76\u751f\u4e4b\u540e\u8fd8\u8981\u4e0d\u8981\u5377\u8fd9\u4e2a\u65b9\u5411\u53e6\u8bf4\uff08\u53cd\u6b63\u6211\u662f\u4e0d\u5377\u4e86\uff0c\u5426\u5219\u4e5f\u4e0d\u4f1a\u6765\u94bbgdal\u8fd9\u4e2a\u65b9\u5411\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56de\u5230\u8bed\u8a00\u672c\u8eab\uff0c\u6211\u4eec\u5148\u8bf4\u8bf4python\u7684\u4f18\u7f3a\u70b9<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f18\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5b66\u4e60\u6210\u672c\u4f4e\uff0c\u8bed\u6cd5\u7cd6\u591a\uff0c\u4e0a\u624b\u5feb<\/li><li>\u5199\u7801\u901f\u5ea6\u5feb\uff0cpython\u4e94\u884c\u4ee3\u7801\u5199\u5b8c\u7684c++\u53ef\u80fd\u8981\u51e0\u5341\u884c\uff0c\u6709\u4e2a\u60f3\u6cd5\u80fd\u5feb\u901f\u7f16\u7a0b\u5b9e\u73b0<\/li><li>\u5305\/\u5e93\u7684\u914d\u7f6e\u6781\u4e3a\u65b9\u4fbf\uff08pip install\/conda install\uff09\uff0c\u4e14\u79cd\u7c7b\u4e30\u5bcc\uff0c\u57fa\u672c\u6240\u6709\u9886\u57df\u90fd\u6709\u5e93\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\uff0c\u914d\u5408anaconda\u914d\u7f6e\u73af\u5883\u975e\u5e38\u65b9\u4fbf<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7f3a\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u8fd0\u884c\u6548\u7387\u4f4e\uff0c\u5c01\u88c5\u7684\u592a\u597d\u5f88\u96be\u53bb\u5e95\u5c42\u4f18\u5316\u3002\uff08numpy\u548cpandas\u7b49\u79d1\u5b66\u5e93\u7684\u4f18\u5316\u76f8\u5f53\u597d\uff0c\u4f46\u662f\u4e0d\u662f\u6240\u6709\u8fd0\u7b97\u90fd\u53ef\u4ee5\u7528\u8fd9\u4e9b\u5e93\u7684api\u6765\u5b9e\u73b0\uff0c\u4e00\u65e6\u4e0d\u80fd\u901a\u8fc7\u77e9\u9635\u8fd0\u7b97\u6765\u5b9e\u73b0\u800c\u8981\u8fdb\u884c\u5faa\u73af\u904d\u5386\u65f6\u5c31\u6548\u7387\u611f\u4eba\u4e86\u3002\u8fd8\u6709\u5c31\u662fpython\u5bf9\u591a\u7ebf\u7a0b\u4e5f\u4e0d\u53cb\u597d\uff09<\/li><li>\u6253\u5305\u662f\u4e2a\u96be\u9898\uff0c\u4e0a\u9762\u5df2\u7ecf\u8bf4\u8fc7\u4e86<\/li><li>\u5bf9\u5927\u578b\u9879\u76ee\u4e0d\u591f\u53cb\u597d\uff08\u8fd9\u65b9\u9762\u6211\u4e5f\u6ca1\u7ecf\u9a8c\uff0c\u5bf9\u4e8e\u5730\u5b66\u751f\u6765\u8bf4\u4e5f\u5f71\u54cd\u4e0d\u5927\uff09<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u8bf4\u8bf4c++\uff0c\u4e2a\u4eba\u89c9\u5f97\u5176\u5b9ec++\u5c31\u51ed\u4e24\u70b9\u7279\u6027\u5c31\u53ef\u4ee5\u6d3b\u4e0b\u53bb\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u8fd0\u884c\u6548\u7387\u9ad8<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\u5bf9c\u7684\u517c\u5bb9\uff0c\u53ea\u8981\u7cfb\u7edf\u5e95\u5c42\u8fd8\u662fc\u5199\u7684\uff0cc++\u4e00\u65f6\u534a\u4f1a\u5c31\u6b7b\u4e0d\u4e86<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u6b64\u4e4b\u5916\u5728gis\u684c\u9762\u8f6f\u4ef6\u5f00\u53d1\u9886\u57df\u4e0d\u7ba1\u662f\u57fa\u4e8emfc\u6846\u67b6\u8fd8\u662fqt\u6846\u67b6\uff0c\u90fd\u8fd8\u662fc++\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u81f3\u4e8ec++\u7684\u7f3a\u70b9\uff0c\u90a3\u5c31\u4e0d\u7528\u591a\u8bf4\u4e86\uff0c\u5bf9\u4e8e\u5730\u5b66\u751f\u6765\u8bf4\u5149\u662f\u7f16\u8bd1\u4e2a\u5e93\u5c31\u662f\u4e2a\u5927\u9ebb\u70e6\uff0c\u81f3\u4e8e\u6307\u9488\uff0c\u5730\u5740\u8fd9\u79cd\u4e1c\u897f\u4e5f\u4e0d\u597d\u7406\u89e3\uff0c\u66f4\u4e0d\u8981\u8c08\u6bcf\u4e09\u5e74\u66f4\u65b0\u4e00\u6b21\u7248\u672c\u91cc\u7684\u65b0\u7279\u6027\uff0c\u4ece\u667a\u80fd\u6307\u9488\uff0c\u6a21\u677f\u5230\u540e\u9762\u7684auto\uff0c\u7c7b\u578b\u63a8\u5bfc\uff0c\u5b8c\u7f8e\u8f6c\u53d1\uff0c\u4e00\u5806\u8bf4\u4e86\u8111\u888b\u90fd\u5927\u7684\u77e5\u8bc6\u70b9\u3002\u4f46\u771f\u5f53\u4f60\u6709\u90a3\u4e2a\u9700\u6c42\u7684\u65f6\u5019\uff0cc++\u5c31\u6210\u4e86\u552f\u4e00\u9009\u62e9\uff0c\u6240\u4ee5\u7eb5\u4f7f\u6709\u4ec0\u4e48\u7f3a\u70b9\uff0c\u4f60\u4e5f\u5f97\u634f\u7740\u9f3b\u5b50\u7528\uff08\u8bf4\u4e0d\u5b9a\u7528\u7740\u7528\u7740\u5c31\u7231\u4e0a\u8fd9\u95e8\u8bed\u8a00\u4e86\u5462\uff1f\uff09\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">GDAL\u7f16\u8bd1\u53ca\u5bfc\u5165 <\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8epython\uff0cgdal\u5e93\u76f4\u63a5pip install\u5927\u6982\u7387\u5931\u8d25\uff0c\u6700\u597d\u901a\u8fc7whl\u6587\u4ef6\u6765\u5b89\u88c5\u3002\u8fd9\u65b9\u9762\u6559\u7a0b\u5f88\u591a\uff0c\u4e0d\u7ec6\u8bf4\uff0c\u6253\u5f00cmd\uff0c\u5230python\u76ee\u5f55\u4e0b\uff08\u6709\u73af\u5883\u53d8\u91cf\u5c31\u4e0d\u7528\uff09\uff0c\u8f93\u5165pip install\uff0c\u7136\u540e\u628awhl\u6587\u4ef6\u62d6\u8fdb\u6765\u5c31\u4f1a\u81ea\u52a8\u586b\u5165whl\u6587\u4ef6\u7684\u5730\u5740\uff0c\u6309\u56de\u8f66\u5b89\u88c5\u5c31\u5b8c\u4e8b\u4e86\u3002\u5bfc\u5165\u7684\u8bddgdal\u5e93\u662f\u5728osgeo\u5e93\u4e2d\uff0c\u5bfc\u5165\u8bed\u53e5\u662ffrom osgeo import gdal<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"534\" src=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1024x534.png\" alt=\"\" class=\"wp-image-733\" srcset=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1024x534.png 1024w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-300x157.png 300w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-768x401.png 768w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image.png 1470w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">c++\u7f16\u8bd1\u548c\u5bfc\u5165<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53c2\u8003\u8fd9\u4f4d\u535a\u4e3b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/blog.csdn.net\/badmanWang\/article\/details\/120870744\" target=\"_blank\"  rel=\"nofollow\" >VS2019C++\u7f16\u8bd1GDAL3.3.2+SQLite3+PROJ6+GEOS3.7.3+HDF4+HDF5\uff08\u4fdd\u59c6\u7ea7\u6559\u7a0b\uff09_gdal2.4.2 sqlite3_Jack\u4e36Wang\u7684\u535a\u5ba2-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u6ce8\u610f\u7684\u662f\u5982\u679c\u540c\u65f6\u7f16\u8bd1debug\u548crelease\u7248\u672c\uff0c\u9700\u8981\u7f16\u8bd1\u597d\u4e00\u4e2a\u7248\u672c\u4f7f\u7528clean\u547d\u4ee4\u8fdb\u884c\u6e05\u7406\uff0c\u5728\u7f16\u8bd1\u53e6\u4e00\u4e2a\u7248\u672c\u3002\u53e6\u5916\u5206\u6e05\u524d\u7f6e\u4f9d\u8d56\u5e93\u7684debug\u548crelease\u7248\u672c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bfc\u5165\u6216\u5982\u679c\u62a5\u9519\u7f3a\u5c11\u4ec0\u4e48dll\uff0c\u5c31\u53bb\u76f8\u5e94\u7684\u5e93\u7684\u7f16\u8bd1\u6587\u4ef6\u4e2d\u627e\uff0c\u518d\u62d6\u5230\u7f16\u8bd1\u51fa\u6765\u7684gdal\u5e93\u7684bin\u6587\u4ef6\u5939\u4e2d\u5c31\u597d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">vs2019\u4e2d\u521b\u5efagdal\u9879\u76ee\uff0c\u5e76\u8bbe\u7f6egitee\u4ed3\u5e93<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/blog.csdn.net\/u012563853\/article\/details\/124748044\" target=\"_blank\"  rel=\"nofollow\" > vs2019\u4f7f\u7528Gitee_gitee vs2019_\u6545\u91cc2130\u7684\u535a\u5ba2-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ed3\u5e93\u5730\u5740<a href=\"https:\/\/gitee.com\/gislxz\/gdal_-learning\" target=\"_blank\"  rel=\"nofollow\" >gislxz\/GDAL_Learning - \u7801\u4e91 - \u5f00\u6e90\u4e2d\u56fd (gitee.com)<\/a><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">GDAL\u5750\u6807\u7cfb\u4e0e\u6295\u5f71<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\u5750\u6807\u7cfb\u57fa\u7840\u77e5\u8bc6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u5730\u6c34\u51c6\u9762-\u5730\u7403\u692d\u5706\u4f53-\u57fa\u51c6\u9762-\u5730\u7406\u5750\u6807\u7cfb-\u6295\u5f71\u5750\u6807\u7cfb<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">OGR\u7a7a\u95f4\u53c2\u8003\u7b80\u4ecb<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9a\u4e49\u5730\u7406\u5750\u6807\u7cfb<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>void CreateMyCRS() {\nOGRSpatialReference oSRS;\n\noSRS.SetGeogCS(\"My geographic CRS\",\n    \"World Geodetic System 1984\",\n    \"My WGS84 Spheroid\",\n    SRS_WGS84_SEMIMAJOR, SRS_WGS84_INVFLATTENING,\n    \"Greenwich\", 0.0,\n    \"degree\", atof(SRS_UA_DEGREE_CONV));\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\"My geographic CRS\"\u4e3a\u5b9a\u4e49\u7684\u5730\u7406\u5750\u6807\u7cfb\u7684\u540d\u79f0\uff0c\"My WGS84 Spheroid\"\u4e3a\u5b9a\u4e49\u7684\u692d\u7403\u4f53\u7684\u540d\u5b57\uff0c\"Greenwich\"\u548c\"degree\"\u5206\u522b\u8868\u793a\u683c\u6797\u5c3c\u6cbb\u5b50\u5348\u7ebf\u53ca\u5176\u5355\u4f4d\uff0c\u8fd9\u4e9b\u4e3b\u8981\u662f\u7528\u6765\u8bf4\u660e\u8fd9\u4e2a\u5730\u7406\u5750\u6807\u7cfb\u7684\u4e00\u4e9b\u4fe1\u606f\uff0c\u662f\u5c55\u73b0\u7ed9\u7528\u6237\u7684\u800c\u4e0d\u662f\u4ec0\u4e48\u5173\u952e\u8bcd\uff08key\uff09\u3002\u7136\u800c\uff0c\"World Geodetic System 1984\"\u662f\u4e00\u4e2a\u5b9a\u4e49\u5927\u5730\u57fa\u51c6\u7684\u5173\u952e\u8bcd\uff0c\u6ce8\u610f\uff1a\u8fd9\u91cc\u7684\u5927\u5730\u57fa\u51c6\u5fc5\u987b\u662f\u4e00\u4e2a\u6709\u6548\u7684\u5927\u5730\u57fa\u51c6\uff0c\u4e0d\u80fd\u968f\u4fbf\u6307\u5b9a\u3002\u800c\u4e0a\u9762\u4ee3\u7801\u4e2d\u7684SRS_WGS84_SEMIMAJOR\u3001SRS_WGS84_INVFLATTENING\u548cSRS_UA DEGREE_CONV\u90fd\u662fOGR\u5b9a\u4e49\u7684\u4e00\u4e9b\u5e38\u6570\uff0c\u5206\u522b\u8868\u793aWGS84\u692d\u7403\u4f53\u7684\u957f\u534a\u8f74\uff086378137 \u7c73\uff09\u3001WGS84 \u692d\u7403\u4f53\u6241\u7387\u7684\u5012\u6570\uff08298.257223563\uff09\u4ee5\u53ca\u5ea6\u548c\u5f27\u5ea6\u7684\u6362\u7b97\u6bd4\u4f8b(0.0174532925199433)\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6211\u7684gdal\u7248\u672c\u4e2d\u62a5\u9519\uff0c\u63d0\u793aSRS_UA_DEGREE_CONV\u4e3aconst char *\u800c\u5f62\u53c2\u7c7b\u578b\u662fdouble\uff0cSRS_UA_DEGREE_CONV\u662fgeos\u5e93\u4e2d\u5b8f\u5b9a\u4e49\u7684\uff0c\u7528atof\u8f6c\u6210double\u540e\u4e0d\u62a5\u9519\u3002<br>\u770b\u4e86\u4e00\u4e0b\u539f\u51fd\u6570\u7684\u5f62\u53c2\uff0c\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u662f\u5f27\u5ea6\u8f6c\u89d2\u5ea6\u7684\u6bd4\u503c\uff0c\u5bf9\u5e94\u7684\u5c31\u662f\u8fd9\u4e2aSRS_UA_DEGREE_CONV\uff0c\u4e0d\u77e5\u662f\u4ec0\u4e48\u60c5\u51b5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OGRSpatialReference\u5185\u7f6e\u4e86\u5bf9\u4e00\u4e9b\u4f17\u6240\u5468\u77e5\u7684CRS\u7684\u652f\u6301\uff0c \u5305\u62ec\u201cNAD27\u201d\u3001\u201cNAD83\u201d\u3001\u201cWGS72\u201d\u548c\u201cWGS84\u201d\uff0c\u53ef\u4ee5\u662f \u5728\u5bf9 OGRSpatialReference\uff1a\uff1aSetWellKnownGeogCS\uff08\uff09 \u7684\u5355\u4e2a\u8c03\u7528\u4e2d\u5b9a\u4e49\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>oSRS.SetWellKnownGeogCS( \"WGS84\" );<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c EPSG \u6570\u636e\u5e93\u53ef\u7528\uff0c\u53ef\u7528 GCS \u4ee3\u7801\u7f16\u53f7\u8bbe\u7f6e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>oSRS.SetWellKnownGeogCS( \"EPSG:4326\" );<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u65b9\u4fbf\u5730\u548c\u5176\u4ed6\u5e93\u8fdb\u884c\u4ea4\u4e92\uff0cOGRSpatialReference\u63d0\u4f9b\u4e86\u4e0eOpenGIS\u7684WKT\u683c\u5f0f\u7684\u76f8\u4e92\u8f6c\u6362\u3002OGRSpatialReference \u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2aWKT\u6765\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u6216\u8005\u5c06\u91cc\u9762\u7684\u4fe1\u606f\u5bfc\u51fa\u4e3aWKT\u683c\u5f0f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>char *pszWKT = NULL;\noSRS.SetWellKnownGeogCS( \"WGS84\" );\noSRS.exportToWkt( &amp;pszWKT );\nprintf( \"%s\\n\", pszWKT );\nCPLFree(pszWKT);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">gdal3.0+\u7248\u672c\u53ef\u4ee5\u8bbe\u7f6e\u53c2\u6570<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>char *pszWKT = nullptr;\noSRS.SetWellKnownGeogCS( \"WGS84\" );\nconst char* apszOptions&#91;] = { \"FORMAT=WKT2_2018\", \"MULTILINE=YES\", nullptr };\noSRS.exportToWkt( &amp;pszWKT, apszOptions );\nprintf( \"%s\\n\", pszWKT );\nCPLFree(pszWKT);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9a\u4e49\u6295\u5f71\u5750\u6807\u7cfb<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>void CreateMyUtm() {\n    \/\/\u521b\u5efa\u7a7a\u95f4\u53c2\u8003\u5bf9\u8c61\n    OGRSpatialReference oSRS;\n\n    \/\/\u8bbe\u7f6e\u5730\u7406\u5750\u6807\u7cfb\u548c\u6295\u5f71\u5750\u6807\u7cfb\n    oSRS.SetProjCS(\"UTM 17 (WGS84) in northern hemisphere.\");\n    \/\/\u8bbe\u7f6e\u5730\u7406\u5750\u6807\u7cfb\u548c\u6295\u5f71\u5750\u6807\u7cfb\n    oSRS.SetWellKnownGeogCS(\"WGS84\");\n    oSRS.SetUTM(17, TRUE);\n\n    \/\/\u8f6c\u6210WKT\u5e76\u6253\u5370\n    char* pszWKT = NULL;\n    const char* apszOptions&#91;] = { \"FORMAT=WKT2_2018\", \"MULTILINE=YES\", nullptr };\n    oSRS.exportToWkt(&amp;pszWKT, apszOptions);\n    std::cout &lt;&lt; pszWKT &lt;&lt; std::endl;\n    CPLFree(pszWKT);\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u6790\u7a7a\u95f4\u53c2\u8003\u4fe1\u606f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u6211\u4eec\u4e3b\u8981\u8bf4\u660e\u5982\u4f55\u4ece\u4e00\u4e2aOGRSpatialReference\u5bf9\u8c61\u4e2d\u83b7\u53d6\u7a7a\u95f4\u53c2\u8003\u7684\u5404\u79cd\u4fe1\u606f\uff0c\u6bd4\u5982\u53ef\u4ee5\u4f7f\u7528 OGRSpatialReference\uff1a\uff1aIsProjected\uff08\uff09\u548c OGRSpatialReference\uff1a\uff1aIsGeographic\uff08\uff09\u65b9\u6cd5\u6765\u5224\u65ad\u8be5\u7a7a\u95f4\u53c2\u8003\u662f\u5730\u7406\u5750\u6807\u7cfb\u8fd8\u662f\u6295\u5f71\u5750\u6807\u7cfb\u3002\u51fd\u6570OGRSpatialReference\uff1aGetSemiMajor\uff08\uff09\u3001OGRSpatialReference\uff1aGetSemiMinor\uff08\uff09\u548c OGRSpatialReference\uff1aGetInvFlattening\uff08\uff09\u7528\u6765\u83b7\u53d6\u53c2\u8003\u692d\u7403\u4f53\u7684\u4fe1\u606f\uff0c\u5206\u522b\u662f\u53c2\u8003\u692d\u7403\u4f53\u7684\u957f\u534a\u8f74\u3001\u77ed\u534a\u8f74\u4ee5\u53ca\u6241\u7387\u7684\u5012\u6570\u3002\u4f7f\u7528OGRSpatial Reference\uff1aGetAttrValue\uff08\uff09\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u83b7\u53d6PROJCS\u3001GEOGCS\u3001DATUM\u3001SPHEROID\u548cPROJECTION\u7684\u540d\u79f0\u5b57\u7b26\u4e32\u3002\u4f7f\u7528OGRSpatialReference\uff1aGetProjParm\uff08\uff09\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u6295\u5f71\u53c2\u6570\u4fe1\u606f\u3002\u4f7f\u7528OGRSpatialReference\uff1aGetLinearUnits\uff08\uff09\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u957f\u5ea6\u5355\u4f4d\u7c7b\u578b\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a\u7c73\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const char *pszProjection = poSRS-&gt;GetAttrValue(\"PROJECTION\");\n\nif( pszProjection == NULL )\n{\n    if( poSRS-&gt;IsGeographic() )\n        sprintf( szProj4+strlen(szProj4), \"+proj=longlat \" );\n    else\n        sprintf( szProj4+strlen(szProj4), \"unknown \" );\n}\nelse if( EQUAL(pszProjection,SRS_PT_CYLINDRICAL_EQUAL_AREA) )\n{\n    sprintf( szProj4+strlen(szProj4),\n    \"+proj=cea +lon_0=%.9f +lat_ts=%.9f +x_0=%.3f +y_0=%.3f \",\n            poSRS-&gt;GetProjParm(SRS_PP_CENTRAL_MERIDIAN,0.0),\n            poSRS-&gt;GetProjParm(SRS_PP_STANDARD_PARALLEL_1,0.0),\n            poSRS-&gt;GetProjParm(SRS_PP_FALSE_EASTING,0.0),\n            poSRS-&gt;GetProjParm(SRS_PP_FALSE_NORTHING,0.0) );\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5750\u6807\u53d8\u6362<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>OGRSpatialReference oSourceSRS, oTargetSRS;\nOGRCoordinateTransformation *poCT;\ndouble x, y;\n\noSourceSRS.importFromEPSG( atoi(papszArgv&#91;i+1]) );\noTargetSRS.importFromEPSG( atoi(papszArgv&#91;i+2]) );\n\npoCT = OGRCreateCoordinateTransformation( &amp;oSourceSRS,\n                                          &amp;oTargetSRS );\nx = atof( papszArgv&#91;i+3] );\ny = atof( papszArgv&#91;i+4] );\n\nif( poCT == NULL || !poCT-&gt;Transform( 1, &amp;x, &amp;y ) )\n    printf( \"Transformation failed.\\n\" );\nelse\n{\n    printf( \"(%f,%f) -&gt; (%f,%f)\\n\",\n            atof( papszArgv&#91;i+3] ),\n            atof( papszArgv&#91;i+4] ),\n            x, y );\n}<\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\">OGR\u5e93<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">OGR\u4f53\u7cfb\u7ed3\u6784<\/h2>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"wp-block-paragraph\">OGR\u4e2d\u6240\u6709\u7684\u7c7b\u90fd\u662f\u4ee5OpenGIS\u63d0\u4f9b\u7684\u7b80\u5355\u8981\u7d20\u7684API\u4e3a\u84dd\u672c\u3001\u4f7f\u7528C++\u8fdb\u884c\u5b9e\u73b0\u7684\uff0c\u4e3b\u8981\u7531\u4ee5\u4e0b\u4e03\u90e8\u5206\u5185\u5bb9\u7ec4\u6210\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Geometry\uff08ogr geometry.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u51e0\u4f55\u5bf9\u8c61\u2236\u51e0\u4f55\u5bf9\u8c61\u7c7b\uff08OGRGeometry\u7b49\uff09\u5c01\u88c5\u4e86OpenGIS\u6a21\u578b\u77e2\u91cf\u6570\u636e\u4ee5\u53ca\u4e00\u4e9b\u51e0\u4f55\u64cd\u4f5c\uff0c\u5e76\u4e14\u63d0\u4f9b\u5e38\u7528\u7684\u4e8c\u8fdb\u5236\u683c\u5f0f\u548c\u6587\u672c\u683c\u5f0f\u4e4b\u95f4\u7684\u8f6c\u6362\u3002\u4e00\u4e2a\u51e0\u4f55\u5bf9\u8c61\u5305\u542b\u4e00\u4e2a\u7a7a\u95f4\u53c2\u8003\uff08\u65e2\u6295\u5f71\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Spatial Reference\uff08ogr_spatialref.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7a7a\u95f4\u53c2\u8003\u2236\u4e00\u4e2aOGRSpatialReference\u5b9a\u4e49\u4e86\u6295\u5f71\u548c\u6c34\u51c6\u9762\u7b49\u4fe1\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Feature\uff08ogr_feature.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u7d20\u2236OGRFeature\u7c7b\u91cc\u9762\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5b8c\u6574\u7684\u8981\u7d20\uff0c\u7531\u4e00\u4e2a\u51e0\u4f55\u5bf9\u8c61\u548c\u4e00\u7cfb\u5217\u7684\u5c5e\u6027\u7ec4\u6210\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Feature Class Definition \uff08ogr_feature.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u7d20\u7c7b\u5b9a\u4e49\u2236OGRFeatureDefn\u7c7b\u4f53\u73b0\u4e86\u4e00\u7ec4\u76f8\u5173\u8981\u7d20\uff08\u901a\u5e38\u662f\u6574\u4e2a\u56fe\u5c42\uff09\u7684\u683c\u5f0f\uff08\u5b57\u6bb5\u5b9a\u4e49\u7684\u96c6\u5408\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Layer\uff08ogrsf_frmts.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56fe\u5c42\u2236OGRLayer\u662f\u4e00\u4e2a\u62bd\u8c61\u57fa\u7c7b\uff0c\u7528\u6765\u63cf\u8ff0\u5728\u4e00\u4e2aOGRData Source\u4e2d\u7684\u4e00\u4e2a\u56fe\u5c42\u4e2d\u7684\u6240\u6709\u8981\u7d20\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Data Source\uff08ogrsf_frmts.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u636e\u6e90\u2236OGRDataSource\u662f\u4e00\u4e2a\u62bd\u8c61\u57fa\u7c7b\uff0c\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u6587\u4ef6\u6216\u8005\u6570\u636e\u5e93\uff0c\u91cc\u9762\u5305\u542b\u4e00\u4e2a\u6216\u8005\u591a\u4e2aOGRLayer\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25cf Drivers\uff08ogrsffrmts.h\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9a71\u52a8\u2236OGRSFDriver\u8868\u793a\u4e00\u4e2a\u6307\u5b9a\u683c\u5f0f\u7684\u8f6c\u6362\u5668\uff0c\u6253\u5f00\u6587\u4ef6\u8fd4\u56de\u4e00\u4e2a OGRDataSource \u5bf9\u8c61\uff0c\u6240\u6709\u652f\u6301\u7684\u9a71\u52a8\u4f7f\u7528 OGRSFDriverRegistrar \u6765\u8fdb\u884c\u7ba1\u7406\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2dGeometry\u5b50\u7c7b\u6bd4\u8f83\u591a\uff0c\u5206\u522b\u5bf9\u5e94\u4e0d\u540c\u7684\u77e2\u91cf\u6570\u636e\u7c7b\u578b<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Geometry\uff08\u51e0\u4f55\u5bf9\u8c61\uff09<\/h3>\n<\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.gislxz.com\/wp-content\/uploads\/2022\/12\/image.png\" alt=\"\" class=\"wp-image-609\" width=\"869\" height=\"208\" srcset=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2022\/12\/image.png 877w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2022\/12\/image-300x72.png 300w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2022\/12\/image-768x184.png 768w\" sizes=\"auto, (max-width: 869px) 100vw, 869px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u77e2\u91cf\u6570\u636e\u64cd\u4f5c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u672c\u64cd\u4f5c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u4ee5\u4e00\u4e2ashp\u6587\u4ef6\u4e3a\u4f8b\u6d4b\u8bd5\u5982\u4f55\u64cd\u4f5c\u4e00\u4e2a\u77e2\u91cf\u6570\u636e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u636e\u8bf4\u660e\uff1a\u8be5\u6570\u636e\u4e3a\u91cd\u5e86\u5e02\u53bf\u7ea7\u884c\u653f\u533a\u5212\u6570\u636e\uff0cshapefile\u683c\u5f0f\uff0c\u8981\u7d20\u4e3a\u591a\u8fb9\u5f62\uff0c<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"633\" src=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1-1024x633.png\" alt=\"\" class=\"wp-image-737\" srcset=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1-1024x633.png 1024w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1-300x186.png 300w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1-768x475.png 768w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1-1536x950.png 1536w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-1-2048x1267.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 gdal\u5e94\u8be5\u662f\u9ed8\u8ba4utf-8\u7f16\u7801\uff0c\u6ce8\u610fvs\u672c\u8eabGB\u7f16\u7801\u5e26\u6765\u7684\u95ee\u9898<br>2 \u6ce8\u610f\u6570\u636e\u6e90\u7684\u91ca\u653e\uff0c\u4e3b\u8981\u662fGDALDataset\u548cOGRFeature\uff0c\u4f46\u662fGDAL\u65b0\u7248\u672c\u7ed3\u5408c++11\u7684\u7279\u6027\u6709\u4e0d\u7528\u91ca\u653e\u7684\u5199\u6cd5<br>3 \u6253\u5f00\u6570\u636e\u65f6\u6709\u53c2\u6570\u53ef\u4ee5\u8f93\u5165\uff0c\u8be6\u89c1gdal\u6587\u6863\u4e2dGDALOpenEX\u51fd\u6570\u8bf4\u660e\uff0c\u4e3b\u8981\u662f\u7b2c\u4e8c\u4e2a\u53c2\u6570\u53ef\u4ee5\u7528\u903b\u8f91\u6216\u8fd0\u7b97\u7b26\u8f93\u5165\u591a\u4e2a\uff0c\u53ef\u4ee5\u540c\u65f6\u8bbe\u5b9a\u6587\u4ef6\u7c7b\u578b\uff08GDAL_OF_VECTOR\uff09\u4ee5\u53ca\u6253\u5f00\u65b9\u5f0f\uff08GDAL_OF_READONLY (exclusive)or GDAL_OF_UPDATE or GDAL_OF_SHARED\uff09\uff0c\u8fd9\u5173\u7cfb\u5230\u80fd\u5426\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002<br><a href=\"https:\/\/gdal.org\/api\/raster_c_api.html#gdal_8h_1a9cb8585d0b3c16726b08e25bcc94274a\" target=\"_blank\"  rel=\"nofollow\" >gdal.h: Raster C API \u2014 GDAL documentation<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/.h\n#include &lt;iostream&gt;\n#include \"ogrsf_frmts.h\"\nvoid OpenESRIShp(const char*);\n\n\/\/.cpp\nvoid OpenESRIShp(const char* FileDIR) {\n    \/\/\u652f\u6301\u4e2d\u6587\u8def\u5f84 \n    CPLSetConfigOption(\"GDAL_FILENAME_IS_UTF8\", \"NO\");\n    \/\/\u5c5e\u6027\u8868\u5b57\u7b26\u7f16\u7801\n    \/\/CPLSetConfigOption(\"SHAPE_ENCODING\", \"\");\n    \/\/\u6ce8\u518c\u6240\u6709\u9a71\u52a8\n    OGRRegisterAll();\n    \/\/\u6253\u5f00\u6570\u636e\n    \/\/\u6307\u9488\u6253\u5f00\n    \/\/auto *poDS = (GDALDataset*)GDALOpenEx(FileDIR, GDAL_OF_VECTOR, NULL, NULL, NULL);\n    \/\/\u667a\u80fd\u6307\u9488\u6253\u5f00\n    GDALDatasetUniquePtr poDS(GDALDataset::Open(FileDIR, GDAL_OF_VECTOR));\n\tif (poDS == NULL)\n\t{\n\t\tstd::cout &lt;&lt; \"Open failed\" &lt;&lt; std::endl;\n\t\texit(1);\n\t}\n    \/\/\u83b7\u53d6\u56fe\u5c42\u4e2a\u6570\n    int layerNum = poDS-&gt;GetLayerCount();\n    std::cout &lt;&lt; layerNum &lt;&lt; std::endl;\n\n    \/\/\u6253\u5f00\u7b2c\u4e00\u4e2a\u56fe\u5c42\uff08Layer\uff09\n    auto poLayer = poDS-&gt;GetLayer(0);\n    std::cout &lt;&lt; poLayer-&gt;GetFeatureCount() &lt;&lt; std::endl;\n\n    \/\/\u6253\u5f00\u7b2c\u4e00\u4e2a\u8981\u7d20\uff08feature\uff09\n    \/\/auto poFeature = poLayer-&gt;GetFeature(0);\n    \/\/std::cout &lt;&lt; poFeature-&gt;GetFID() &lt;&lt; std::endl;\n\n    \/\/\u6253\u5f00\u5c5e\u6027\u8868\uff0c\u8f93\u51fa\u8868\u5934\n    OGRFeatureDefn* poFDefn = poLayer-&gt;GetLayerDefn();\n    std::cout &lt;&lt; poFDefn-&gt;GetFieldCount() &lt;&lt; std::endl;\n    for (int FieldIndex = 0; FieldIndex &lt; poFDefn-&gt;GetFieldCount(); FieldIndex++)    {\n        auto&amp;&amp; layerField0 = poFDefn-&gt;GetFieldDefn(FieldIndex);\n        std::cout &lt;&lt; layerField0-&gt;GetNameRef() &lt;&lt; \" \";\n    }\n\n    \/\/\u83b7\u5f97\u6bcf\u4e2a\u8981\u7d20\u7684\u5c5e\u6027\u8868\n    \/\/c++ 11 \u5199\u6cd5\n    \/\/\u4e07\u80fd\u5f15\u7528\uff0coField\u5b9e\u9645\u7c7b\u578b\u4e3a\u5de6\u503c\u5f15\u7528\u8fed\u4ee3\u5668 const OGRFeature::FiledValue&amp;\n    \/\/\u4e5f\u53ef\u4ee5\u4e0d\u5224\u65ad\u6bcf\u4e2aoField\u7684\u7c7b\u578b\uff0c\u76f4\u63a5GetFieldAsString\n    \/\/printf\u61d2\u5f97\u6539\u6210cout\u4e86\n    for (const auto&amp; poFeature : poLayer) {\n        for (auto&amp;&amp; oField : *poFeature)\n        {\n            if (oField.IsUnset())\n            {\n                printf(\"(unset),\");\n                continue;\n            }\n            if (oField.IsNull())\n            {\n                printf(\"(null),\");\n                continue;\n            }\n            switch (oField.GetType())\n            {\n            case OFTInteger:\n                printf(\"%d,\", oField.GetInteger());\n                break;\n            case OFTInteger64:\n                printf(CPL_FRMT_GIB \",\", oField.GetInteger64());\n                break;\n            case OFTReal:\n                printf(\"%.3f,\", oField.GetDouble());\n                break;\n            case OFTString:\n                \/\/ GetString() returns a C string\n                printf(\"%s,\", oField.GetString());\n                break;\n            default:\n                \/\/ Note: we use GetAsString() and not GetString(), since\n                \/\/ the later assumes the field type to be OFTString while the\n                \/\/ former will do a conversion from the original type to string.\n                printf(\"%s,\", oField.GetAsString());\n                break;\n            }\n        }\n        std::cout &lt;&lt; std::endl;\n    }\n    \n\n    \/\/\u65e7\u5199\u6cd5\n    \/\/OGRFeatureDefn* poFDefn = poLayer-&gt;GetLayerDefn();\n    \/\/for (int iField = 0; iField &lt; poFDefn-&gt;GetFieldCount(); iField++)\n    \/\/{\n    \/\/    if (!poFeature-&gt;IsFieldSet(iField))\n    \/\/    {\n    \/\/        printf(\"(unset),\");\n    \/\/        continue;\n    \/\/    }\n    \/\/    if (poFeature-&gt;IsFieldNull(iField))\n    \/\/    {\n    \/\/        printf(\"(null),\");\n    \/\/        continue;\n    \/\/    }\n    \/\/    OGRFieldDefn* poFieldDefn = poFDefn-&gt;GetFieldDefn(iField);\n\n    \/\/    switch (poFieldDefn-&gt;GetType())\n    \/\/    {\n    \/\/    case OFTInteger:\n    \/\/        printf(\"%d,\", poFeature-&gt;GetFieldAsInteger(iField));\n    \/\/        break;\n    \/\/    case OFTInteger64:\n    \/\/        printf(CPL_FRMT_GIB \",\", poFeature-&gt;GetFieldAsInteger64(iField));\n    \/\/        break;\n    \/\/    case OFTReal:\n    \/\/        printf(\"%.3f,\", poFeature-&gt;GetFieldAsDouble(iField));\n    \/\/        break;\n    \/\/    case OFTString:\n    \/\/        printf(\"%s,\", poFeature-&gt;GetFieldAsString(iField));\n    \/\/        break;\n    \/\/    default:\n    \/\/        printf(\"%s,\", poFeature-&gt;GetFieldAsString(iField));\n    \/\/        break;\n    \/\/    }\n    \/\/}\n\n    \/\/\u8bfb\u53d6\u51e0\u4f55\u56fe\u5f62\uff08Geometry\uff09\n    \/\/\u8bfb\u53d6\u56fe\u5c42\u7b2c\u4e00\u4e2a\u8981\u7d20\uff08feature\uff09\n    auto poFeature = poLayer-&gt;GetFeature(0);\n    OGRGeometry* poGeometry;\n    poGeometry = poFeature-&gt;GetGeometryRef();\n    \/\/\u5982\u679c\u4e3a\u70b9\n    if (poGeometry != NULL\n        &amp;&amp; wkbFlatten(poGeometry-&gt;getGeometryType()) == wkbPoint)\n    {\n        OGRPoint* poPoint = poGeometry-&gt;toPoint();\n        printf(\"%.3f,%3.f\\n\", poPoint-&gt;getX(), poPoint-&gt;getY());\n    }\n    \/\/\u5982\u679c\u4e3a\u591a\u8fb9\u5f62\uff0c\u5219\u8f93\u51fa\u591a\u8fb9\u5f62\u6240\u6709\u70b9\n    else if(poGeometry != NULL &amp;&amp; wkbFlatten(poGeometry-&gt;getGeometryType()) == wkbPolygon)\n    {\n        OGRPolygon* poPolygon = poGeometry-&gt;toPolygon();\n        \/\/\u770b\u770b\u591a\u8fb9\u5f62\u6709\u51e0\u6761\u8fb9\uff0c\u4e00\u822c\u90fd\u662f\u4e00\u6761\u8fb9\u4ece\u5934\u5230\u5e95\uff0c\u5373\u5916\u73af\uff08\u6709\u7a7a\u6d1e\u7684\u60c5\u51b5\u4e0d\u80fd\u8fd9\u4e48\u5199\uff09\n        int CurveNum = 0;\n        for (auto poCurve : *poPolygon) {\n            CurveNum++;\n            for (auto poPoint : *poCurve) {\n                std::cout &lt;&lt; \"x=\" &lt;&lt; poPoint.getX() &lt;&lt; \" ,\";\n                std::cout &lt;&lt; \"y=\" &lt;&lt; poPoint.getY() &lt;&lt; std::endl;\n            }\n            std::cout &lt;&lt; CurveNum &lt;&lt; std::endl;  \n        }\n    }\n    else {\n        std::cout &lt;&lt; poGeometry-&gt;getGeometryName() &lt;&lt; std::endl;\n        std::cout &lt;&lt; poGeometry-&gt;getGeometryType() &lt;&lt; std::endl;\n        std::cout &lt;&lt; \"\u51e0\u4f55\u56fe\u6848\u8bfb\u53d6\u5931\u8d25\" &lt;&lt; std::endl;\n    }\n    \/\/\u4fdd\u9669\u8d77\u89c1\uff0c\u9500\u6bc1\u5bf9\u8c61\uff0cgdal\u7684\u6587\u6863\u641e\u4e0d\u660e\u767d\u65b0\u7248\u672c\u8fd9\u4e2a\u5bf9\u8c61\u8981\u4e0d\u8981\u91ca\u653e\n    OGRFeature::DestroyFeature(poFeature);\n\n    \/\/gdal3 c++ 11 \u4e0d\u9700\u8981\u91ca\u653e\u8d44\u6e90\n    \/\/GDALClose(poDS);\n\n}\n\n\/\/\u53c2\u8003\u4ee3\u7801\n\/\/ gdal2.3+ c++11\n\/\/{\n\/\/GDALAllRegister();\n\/\/\n\/\/GDALDatasetUniquePtr poDS(GDALDataset::Open(\"point.shp\", GDAL_OF_VECTOR));\n\/\/if (poDS == nullptr)\n\/\/{\n\/\/    printf(\"Open failed.\\n\");\n\/\/    exit(1);\n\/\/}\n\/\/\n\/\/for (const OGRLayer* poLayer : poDS-&gt;GetLayers())\n\/\/{\n\/\/    for (const auto&amp; poFeature : *poLayer)\n\/\/    {\n\/\/        for (const auto&amp; oField : *poFeature)\n\/\/        {\n\/\/            if (oField.IsUnset())\n\/\/            {\n\/\/                printf(\"(unset),\");\n\/\/                continue;\n\/\/            }\n\/\/            if (oField.IsNull())\n\/\/            {\n\/\/                printf(\"(null),\");\n\/\/                continue;\n\/\/            }\n\/\/            switch (oField.GetType())\n\/\/            {\n\/\/            case OFTInteger:\n\/\/                printf(\"%d,\", oField.GetInteger());\n\/\/                break;\n\/\/            case OFTInteger64:\n\/\/                printf(CPL_FRMT_GIB \",\", oField.GetInteger64());\n\/\/                break;\n\/\/            case OFTReal:\n\/\/                printf(\"%.3f,\", oField.GetDouble());\n\/\/                break;\n\/\/            case OFTString:\n\/\/                \/\/ GetString() returns a C string\n\/\/                printf(\"%s,\", oField.GetString());\n\/\/                break;\n\/\/            default:\n\/\/                \/\/ Note: we use GetAsString() and not GetString(), since\n\/\/                \/\/ the later assumes the field type to be OFTString while the\n\/\/                \/\/ former will do a conversion from the original type to string.\n\/\/                printf(\"%s,\", oField.GetAsString());\n\/\/                break;\n\/\/            }\n\/\/        }\n\/\/\n\/\/        const OGRGeometry* poGeometry = poFeature-&gt;GetGeometryRef();\n\/\/        if (poGeometry != nullptr\n\/\/            &amp;&amp; wkbFlatten(poGeometry-&gt;getGeometryType()) == wkbPoint)\n\/\/        {\n\/\/            const OGRPoint* poPoint = poGeometry-&gt;toPoint();\n\/\/\n\/\/            printf(\"%.3f,%3.f\\n\", poPoint-&gt;getX(), poPoint-&gt;getY());\n\/\/        }\n\/\/        else\n\/\/        {\n\/\/            printf(\"no point geometry\\n\");\n\/\/        }\n\/\/    }\n\/\/}\n\/\/return 0;\n\/\/}\n\n\/\/\u65e7\u7248\u672cint main()\n\/\/{\n\/\/GDALAllRegister();\n\/\/\n\/\/GDALDataset* poDS = static_cast&lt;GDALDataset*&gt;(\n\/\/    GDALOpenEx(\"point.shp\", GDAL_OF_VECTOR, NULL, NULL, NULL));\n\/\/if (poDS == NULL)\n\/\/{\n\/\/    printf(\"Open failed.\\n\");\n\/\/    exit(1);\n\/\/}\n\/\/\n\/\/OGRLayer* poLayer = poDS-&gt;GetLayerByName(\"point\");\n\/\/OGRFeatureDefn* poFDefn = poLayer-&gt;GetLayerDefn();\n\/\/\n\/\/poLayer-&gt;ResetReading();\n\/\/OGRFeature* poFeature;\n\/\/while ((poFeature = poLayer-&gt;GetNextFeature()) != NULL)\n\/\/{\n\/\/    for (int iField = 0; iField &lt; poFDefn-&gt;GetFieldCount(); iField++)\n\/\/    {\n\/\/        if (!poFeature-&gt;IsFieldSet(iField))\n\/\/        {\n\/\/            printf(\"(unset),\");\n\/\/            continue;\n\/\/        }\n\/\/        if (poFeature-&gt;IsFieldNull(iField))\n\/\/        {\n\/\/            printf(\"(null),\");\n\/\/            continue;\n\/\/        }\n\/\/        OGRFieldDefn* poFieldDefn = poFDefn-&gt;GetFieldDefn(iField);\n\/\/\n\/\/        switch (poFieldDefn-&gt;GetType())\n\/\/        {\n\/\/        case OFTInteger:\n\/\/            printf(\"%d,\", poFeature-&gt;GetFieldAsInteger(iField));\n\/\/            break;\n\/\/        case OFTInteger64:\n\/\/            printf(CPL_FRMT_GIB \",\", poFeature-&gt;GetFieldAsInteger64(iField));\n\/\/            break;\n\/\/        case OFTReal:\n\/\/            printf(\"%.3f,\", poFeature-&gt;GetFieldAsDouble(iField));\n\/\/            break;\n\/\/        case OFTString:\n\/\/            printf(\"%s,\", poFeature-&gt;GetFieldAsString(iField));\n\/\/            break;\n\/\/        default:\n\/\/            printf(\"%s,\", poFeature-&gt;GetFieldAsString(iField));\n\/\/            break;\n\/\/        }\n\/\/    }\n\/\/\n\/\/    OGRGeometry* poGeometry = poFeature-&gt;GetGeometryRef();\n\/\/    if (poGeometry != NULL\n\/\/        &amp;&amp; wkbFlatten(poGeometry-&gt;getGeometryType()) == wkbPoint)\n\/\/    {\n\/\/        OGRPoint* poPoint = (OGRPoint*)poGeometry;\n\/\/\n\/\/        printf(\"%.3f,%3.f\\n\", poPoint-&gt;getX(), poPoint-&gt;getY());\n\/\/    }\n\/\/    else\n\/\/    {\n\/\/        printf(\"no point geometry\\n\");\n\/\/    }\n\/\/    OGRFeature::DestroyFeature(poFeature);\n\/\/}\n\/\/\n\/\/GDALClose(poDS);\n\/\/}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u7279\u522b\u8bf4\u660e\uff1a\u7f16\u7801\u95ee\u9898<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">vs2019\u7684\u7f16\u7801\u95ee\u9898\u975e\u5e38\u5934\u75bc\uff0c\u9996\u5148vs\u548cwin\u7cfb\u7edf\u90fd\u662fgbk\u7f16\u7801\uff0c\u5c24\u5176\u662fwin\u7cfb\u7edf\u7684gbk\u7f16\u7801\uff0c\u610f\u5473\u7740\u5982\u679c\u4f60\u5f3a\u884c\u8bbe\u7f6e\u5168\u5c40utf-8\u7f16\u7801\u540e\u4f1a\u5bfc\u81f4\u6839\u672c\u8bfb\u53d6\u4e0d\u4e86\u4e2d\u6587\u6587\u4ef6\uff0c\u6240\u4ee5\u4e2d\u6587\u8def\u5f84\u8bfb\u53d6\u7684\u65f6\u5019\u4e00\u5b9a\u662fgbk\u7f16\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u8bbe\u7f6e\u6587\u4ef6\u540d\u4e0d\u662futf-8\u7f16\u7801\nCPLSetConfigOption(\"GDAL_FILENAME_IS_UTF8\", \"NO\");<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u6b21gdal\u5185\u90e8\u5b8c\u5168\u662futf-8\u7f16\u7801\u7684\uff0c\u8fd9\u70b9\u6211\u4eec\u4e5f\u6539\u53d8\u4e0d\u4e86\uff0c\u4f46\u7531\u4e8ewin\u7cfb\u7edf\u662fgbk\u7f16\u7801\uff0c\u56e0\u6b64cmd\u63a7\u5236\u53f0\u4e5f\u53ea\u652f\u6301gbk\uff0c\u6743\u8861\u4e4b\u4e0b\u6211\u4eec\u53ea\u80fd\u653e\u5f03\u63a7\u5236\u53f0\uff0c\u63a5\u53d7\u63a7\u5236\u53f0\u8c03\u8bd5\u7684\u65f6\u5019\u770b\u5230\u4e71\u7801\uff0c\u624d\u80fd\u4fdd\u8bc1\u6d89\u53ca\u5230\u4e2d\u6587\u529f\u80fd\u7684\u6b63\u5e38\u8fd0\u884c\u3002\u6211\u4eec\u53ea\u8981\u4fdd\u8bc1\u6700\u540e\u8f93\u51fa\u5230\u6587\u4ef6\u7684\u7ed3\u679c\u662f\u6b63\u5e38\u7684\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u5916c++ 11\u4e4b\u540e\u652f\u6301string\u5f3a\u5236utf-8\u7f16\u7801\uff0c\u51ed\u501f\u8fd9\u70b9\u6211\u4eec\u53ef\u4ee5\u5bf9\u5c5e\u6027\u8868\u7684\u5b57\u7b26\u4e32\u8fdb\u884c\u6bd4\u8f83\u4e86\uff0c\u540e\u9762\u5b9e\u4f8b\u65f6\u8be6\u7ec6\u8bf4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>string s1 = u8\"\u5e02\u8f96\u533a\";<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7f51\u4e0a\u67e5\u9605\u4e86\u76f8\u5f53\u591a\u7684\u8d44\u6599\uff0c\u65e0\u975e\u662f\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 \u6e90\u7801\u6587\u4ef6\u4fdd\u5b58\u4e3autf-8<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 \u8bbe\u7f6e\u5168\u5c40\u73af\u5883utf-8<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>system(\"chcp 65001\");<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">3 \u901a\u8fc7\u547d\u4ee4\u884c\u8bbe\u7f6e\u8f93\u5165\u4e3autf-8\uff0c\u6267\u884c\u65f6\u4e3agbk\uff08\u9879\u76ee-&gt;\u5c5e\u6027-&gt;c\/c++-&gt;\u547d\u4ee4\u884c\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/source-charset:utf-8 \/execution-charset:gbk <\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd8\u6ca1\u5b8c\u5168\u641e\u660e\u767d\u5230\u5e95\u600e\u4e48\u6700\u5408\u9002\uff0c\u4ee5\u540e\u518d\u66f4<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5750\u6807\u7cfb\u76f8\u5173<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f85\u66f4\u65b0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u51c6\u5907\u5355\u72ec\u5199\u4e00\u7bc7\u6587\u7ae0\u5c06\u6805\u683c\u548c\u77e2\u91cf\u6570\u636e\u7684\u5750\u6807\u7cfb\u76f8\u5173\u64cd\u4f5c\u7edf\u4e00\u5f52\u7eb3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5c5e\u6027\u76f8\u5173<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u672c\u64cd\u4f5c\u4e2d\u5df2\u7ecf\u4ea4\u4ee3\u4e86\u5c5e\u6027\u8868\u7684\u8bfb\u53d6\u65b9\u6cd5\uff0c\u4e0b\u9762\u8bb0\u5f55\u4e00\u4e9b\u7f16\u8f91\u64cd\u4f5c\u3002\u65b0\u5efa\u4e00\u4e2a\u7c7b\u7528\u9759\u6001\u6210\u5458\u51fd\u6570\u53bb\u5b9e\u73b0\u5404\u7c7b\u529f\u80fd\u3002\u9996\u5148\u6ce8\u610f\u7684\u662f\u6587\u4ef6\u6253\u5f00\u7684\u5c5e\u6027\uff0c\u4e0a\u6587\u63d0\u5230\u4e86GDAL_OF_READONLY (exclusive)or GDAL_OF_UPDATE or GDAL_OF_SHARED\u8fd9\u4e09\u4e2a\u9009\u9879\uff0c\u5982\u679c\u4e0d\u8bbe\u7f6e\u7684\u8bdd\u9ed8\u8ba4\u662freadonly\uff0c\u518d\u4fee\u6539\u5c5e\u6027\u8868\u65f6\u5c31\u4f1a\u62a5\u9519\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/CRS_defn.h\n#pragma once\n#include \"gdal_priv.h\"\n#include \"ogrsf_frmts.h\"\n#include &lt;iostream&gt;\n\nclass CRS_defn {\npublic:\n\t\/\/\u6dfb\u52a0\u5c5e\u6027\u5217\n\tstatic void addDefn(OGRLayer* , OGRFieldDefn*);\n\t\/\/\u7ed9\u5c5e\u6027\u8868\u67d0\u5217\u8d4b\u503c\n\ttemplate &lt;typename F&gt;\n\tstatic void assignDefn(OGRLayer* , int&amp; , F&amp;&amp;);\n\t\/\/\u5220\u9664\u6307\u5b9a\u5c5e\u6027\u8868\u5217\n\tstatic void deleteDefn(OGRLayer*, int);\n};<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u5c5e\u6027\u8868\u4e2d\u63d2\u5165\u5217<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">api\u5c31\u662fOGRLayer::createField\uff0c\u53c2\u6570\u8f93\u5165OGRFieldDefn*\u3002OGRFieldDefn\u7c7b\u4e2d\u8bbe\u7f6e\u5c5e\u6027\u8868\u5217\u7684\u540d\u79f0\u548c\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u91cc\u5217\u540d\u8bbe\u7f6e\u6210testDefn\uff0c\u6570\u636e\u7c7b\u578b\u4e3aint\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\u4ee3\u7801\u89c4\u8303\uff0c\u8bbe\u7f6e\u6709\u6548\u6027\u68c0\u67e5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/CRS_defn.cpp\nvoid CRS_defn::addDefn(OGRLayer* tarLayer , OGRFieldDefn* newField) {\n\tif (tarLayer == NULL || newField == NULL) {\n\t\tstd::cout &lt;&lt; \"\u8f93\u5165\u65e0\u6548\" &lt;&lt; std::endl;\n\t\treturn;\n\t}\n\tif (tarLayer-&gt;CreateField(newField) == OGRERR_NONE) {\n\t\tstd::cout &lt;&lt; \"\u65b0\u589e\u5c5e\u6027\u5217\u6210\u529f\" &lt;&lt; std::endl;\n\t}\n}\n\n    \/\/int main()\n    \/\/\u5168\u5c40utf-8\u7f16\u7801\n    system(\"chcp 65001\");\n    \/\/ \u589e\u52a0\u5c5e\u6027\u5217\n    GDALAllRegister();\n    const char* chongqingDIR = \"C:\/Users\/23005\/Desktop\/chongqing\/chongqing.shp\";\n    GDALDatasetUniquePtr poDS(GDALDataset::Open(chongqingDIR, GDAL_OF_VECTOR || GDAL_OF_UPDATE));\n    if (poDS == NULL)\n    {\n        printf(\"Open failed.\\n\");\n        exit(1);\n    }\n    OGRLayer* poLayer = poDS-&gt;GetLayer(0);\n    OGRFieldDefn* testFieldDefn = new OGRFieldDefn(\"testDefn\",OFTInteger);\n    CRS_defn::addDefn(poLayer,testFieldDefn);\n    delete testFieldDefn;<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u5c5e\u6027\u5217\u5220\u9664<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c5e\u6027\u5217\u5220\u9664\u6bd4\u8f83\u7b80\u5355\uff0c\u8c03\u7528OGRLayer::deleteDefn\u5373\u53ef<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/CRS_defn.cpp\nvoid CRS_defn::deleteDefn(OGRLayer* tarLayer, int fieldIndex)\n{\n\tif (tarLayer == NULL || fieldIndex &lt; 0 || fieldIndex &gt;= tarLayer-&gt;GetLayerDefn()-&gt;GetFieldCount()) {\n\t\tstd::cout &lt;&lt; \"\u8f93\u5165\u65e0\u6548\" &lt;&lt; std::endl;\n\t\treturn;\n\t}\n\ttarLayer-&gt;DeleteField(fieldIndex);\n}\n\/\/int main()\n\/\/\u83b7\u5f97\u5c5e\u6027\u8868\u6700\u540e\u4e00\u5217\u7684\u5e8f\u53f7\nint lastFieldIndex = poLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() - 1;\n\/\/\u5220\u9664\nCRS_defn::deleteDefn(poLayer, lastFieldIndex);<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u5c5e\u6027\u8868\u503c\u4fee\u6539<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c5e\u6027\u8868\u503c\u4fee\u6539\u590d\u6742\u4e00\u70b9\uff0c\u9700\u8981\u5bf9\u56fe\u5c42\uff08Layer\uff09\u5faa\u73af\uff0c\u5bf9\u56fe\u5c42\u4e2d\u6bcf\u4e2a\u8981\u7d20\uff08Feature\uff09\u8fdb\u884c\u8d4b\u503c\u64cd\u4f5c\uff0capi\u662fOGRFeature::SetField()\uff0c\u8fd9\u4e2a\u51fd\u6570\u6709\u5f88\u591a\u91cd\u8f7d\uff0c\u5bf9\u5e94\u4e0d\u540c\u6570\u636e\u7c7b\u578b\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u9700\u8981\u4fee\u6539\u5c5e\u6027\u503c\u7684\u5217\u53f7\uff0c\u7b2c\u4e8c\u4e2a\u662f\u5199\u5165\u7684\u503c\uff0c\u6839\u636e\u5199\u5165\u503c\u7684\u7c7b\u578b\u81ea\u52a8\u5339\u914d\u76f8\u5e94\u51fd\u6570\uff0c\u53ef\u4ee5\u4e0e\u8bfb\u53d6\u5c5e\u6027\u503c\u7684\u51fd\u6570\u76f8\u6bd4\u8f83\uff0c\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\uff0c\u4e0d\u8fc7\u8bfb\u53d6\u503c\u7684\u8bdd\u5c31\u9700\u8981\u6307\u5b9a\u8bfb\u53d6\u503c\u7684\u7c7b\u578b\uff0c\u56e0\u6b64\u6709\u6570\u4e2a\u51fd\u6570\u5bf9\u5e94\u4e0d\u540c\u7c7b\u578b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u9996\u5148\u5c1d\u8bd5\u7ed9\u65b0\u589e\u5217\u7b80\u5355\u8d4b\u503c\u4e00\u4e2a\u6570\u5b57\uff0c\u7ed3\u679c\u8fd0\u884c\u540e\u6ca1\u6709\u6548\u679c\uff0c\u67e5\u4e86\u5f88\u4e45\u7684\u6587\u6863\uff0c\u5f97\u77e5\u4fee\u6539feature\u7684\u6570\u636e\u540e\u9700\u8981\u4f7f\u7528setFeature\u6765\u66f4\u65b0\u6570\u636e\uff0c\u540c\u6837\u7684\uff0c\u65b0\u5efa\u4e00\u4e2a\u77e2\u91cf\u6570\u636e\u5728\u8bbe\u7f6e\u5b8c\u76f8\u5e94\u6570\u636e\u540e\u4e5f\u9700\u8981\u7528createFeature\u6765\u6fc0\u6d3b\u3002\u53ea\u662f\u5bf9feature\u5c42\u9762\u7684\u4fee\u6539\u9700\u8981\u8c03\u7528setFeature\uff0c\u50cf\u4e0a\u9762\u76f4\u63a5\u5728Layer\u5c42\u9762\u589e\u51cf\u5c5e\u6027\u5217\u662f\u4e0d\u7528\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662fOGRLayer::setFeature\u8fd9\u4e2a\u51fd\u6570\u7684\u8f93\u5165\u662fOGRFeature*\uff0c\u800c\u6211\u4eec\u7528\u7684\u65b0\u7248\u672c\u7684\u5199\u6cd5\u904d\u5386\uff0c\u8fed\u4ee3\u5668\u5f97\u5230\u7684\u662fOGRFeature\u7684Unique_Ptr\u667a\u80fd\u6307\u9488\uff0c\u56e0\u6b64\u8fd8\u9700\u8981\u7528get\u51fd\u6570\u83b7\u5f97\u91cc\u9762\u7684\u88f8\u6307\u9488\u4f20\u5165\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd8\u6709\u4e2aapi\u662fOGRLayer::SyncToDisk()\uff0c\u662f\u5199\u5165\u78c1\u76d8\uff0c\u4f46\u6211\u6d4b\u8bd5\u4e0d\u9700\u8981\u8fd9\u4e2a\u51fd\u6570\u4e5f\u80fd\u5bf9shp\u6587\u4ef6\u8fdb\u884c\u4fee\u6539\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>void CRS_defn::assignDefn(OGRLayer* tarLayer, int&amp; fieldIndex)\n{\n\tif (tarLayer == NULL || fieldIndex &lt; 0 || fieldIndex &gt;= tarLayer-&gt;GetLayerDefn()-&gt;GetFieldCount()) {\n\t\tstd::cout &lt;&lt; \"\u8f93\u5165\u65e0\u6548\" &lt;&lt; std::endl;\n\t\treturn;\n\t}\n\tfor (const auto&amp; oFeature : *tarLayer) {\n\t\toFeature-&gt;SetField(fieldIndex, 1);\n\t\ttarLayer-&gt;SetFeature(oFeature.get());\n\t}\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u518d\u6df1\u5165\u7684\u8fdb\u884c\u4e00\u4e9b\u4fee\u6539\uff0c\u663e\u7136\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u4e0d\u53ef\u80fd\u5c31\u8fd9\u4e48\u7b80\u5355\u7684\u7ed9\u5c5e\u6027\u8d4b\u4e00\u4e2a\u5e38\u503c\uff0c\u80af\u5b9a\u662f\u8981\u5c06\u9700\u8981\u8ba1\u7b97\u7684\u7ed3\u679c\u8fdb\u884c\u8d4b\u503c\u3002\u4e0a\u9762\u8bf4\u8fc7\u7ed9\u5c5e\u6027\u8868\u8d4b\u503c\u9700\u8981\u904d\u5386\u56fe\u5c42\u4e2d\u7684\u8981\u7d20\uff0c\u5b9e\u9645\u4e0a\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\u6211\u4eec\u4e5f\u9700\u8981\u5bf9\u6bcf\u4e2a\u8981\u7d20\u8fdb\u884c\u5355\u72ec\u8ba1\u7b97\u518d\u8d4b\u503c\u3002\u6bd4\u5982\u8bf4\u6211\u4eec\u73b0\u5728\u9700\u8981\u5bf9\u793a\u4f8b\u6570\u636e\u4e2d\u7c7b\u578b\u8fd9\u4e00\u9879\u8fdb\u884c\u4e00\u4e2a\u7f16\u7801\u5904\u7406\uff0c\u7c7b\u578b\u4e2d\u4e00\u5171\u6709\u5e02\u8f96\u533a\uff0c\u53bf\uff0c\u81ea\u6cbb\u53bf\u4e09\u79cd\uff0c\u6211\u4eec\u5206\u522b\u4ee50\uff0c1\uff0c2\u6765\u6620\u5c04\u5e76\u5199\u5165testDefn\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"677\" src=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-2-1024x677.png\" alt=\"\" class=\"wp-image-742\" srcset=\"https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-2-1024x677.png 1024w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-2-300x198.png 300w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-2-768x508.png 768w, https:\/\/www.gislxz.com\/wp-content\/uploads\/2023\/03\/image-2.png 1419w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4e00\u6b65\u4e00\u6b65\u6765\uff0c\u9996\u5148\u6700\u7b80\u5355\u7684\u5199\u6cd5\u5f00\u59cb\u3002\u6700\u57fa\u7840\u7684\u5199\u6cd5\u5c31\u662f\u5728\u5faa\u73af\u5185\u90e8\u8fdb\u884c\u6620\u5c04\u5904\u7406\uff0c\u793a\u610f\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\tif (tarLayer == NULL || fieldIndex &lt; 0 || fieldIndex &gt;= tarLayer-&gt;GetLayerDefn()-&gt;GetFieldCount()) {\n\t\tstd::cout &lt;&lt; \"\u8f93\u5165\u65e0\u6548\" &lt;&lt; std::endl;\n\t\treturn;\n\t}\n\tfor (const auto&amp; oFeature : *tarLayer) {\n                \/\/\u5728\u8fd9\u91cc\u8fdb\u884c\u6620\u5c04\u8ba1\u7b97,\u5206\u4e09\u7c7b\u5bf9result\u8d4b\u503c\n                int result;\n                switch(){...}\n\t\toFeature-&gt;SetField(fieldIndex, result);\n\t\ttarLayer-&gt;SetFeature(oFeature.get());\n\t}\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u5199\u6cd5\u6ca1\u6709\u95ee\u9898\uff0c\u4f46\u95ee\u9898\u5728\u4e8e\u5982\u679c\u6211\u4eec\u9700\u8981\u5176\u4ed6\u8d4b\u503c\u7b56\u7565\u7684\u65f6\u5019\uff0c\u6bcf\u6b21\u90fd\u8981\u65b0\u5199\u4e00\u4e2a\u8fd9\u6837\u7684\u51fd\u6570\uff0c\u4e8b\u5b9e\u4e0a\u6211\u4eec\u6bcf\u6b21\u9700\u8981\u5199\u7684\u53ea\u662f\u5faa\u73af\u4e2d\u95f4\u8ba1\u7b97\u7684\u90a3\u5757\uff0c\u4e0a\u4e0b\u90fd\u662f\u91cd\u590d\u7684\uff0c\u7528\u8f6f\u4ef6\u5de5\u7a0b\u7684\u8bdd\u6765\u8bf4\u5c31\u662f\u4e0d\u7b26\u5408\u4f4e\u5185\u805a\u9ad8\u8026\u5408\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u4e0a\u6211\u4eec\u53ef\u4ee5\u628a\u8d4b\u503c\u7b56\u7565\u5199\u6210\u4e00\u4e2a\u51fd\u6570\uff0c\u7136\u540e\u4f5c\u4e3a\u51fd\u6570\u6307\u9488\u4f20\u8fdb\u53bb\uff0c\u5728\u5faa\u73af\u65f6\u8c03\u7528\u5c31\u884c\u4e86\u3002\u6211\u4eec\u5f53\u7136\u53ef\u4ee5\u628a\u51fd\u6570\u6307\u9488\u4f5c\u4e3a\u53c2\u6570\u6765\u4f20\u5165\u6211\u4eec\u5199\u7684\u51fd\u6570\uff0c\u4f46\u662f\u53c8\u6709\u4e00\u4e2a\u95ee\u9898\u662f\u51fd\u6570\u6307\u9488\u7684\u8fd4\u56de\u7c7b\u578b\u662f\u8981\u7ed9\u5b9a\u7684\uff0c\u6bd4\u5982\u6211\u4eec\u5f53\u524d\u8fd9\u4e2a\u8981\u505a\u7684\u8fd9\u4e2a\u6620\u5c04\uff0c\u8fd4\u56de\u7684\u662f0\uff0c1\uff0c2\uff0cint\u7c7b\u578b\uff0c\u51fd\u6570\u6307\u9488\u5c31\u5f97\u662fint*\uff0c\u4e14\u5f62\u53c2\u7c7b\u578b\u548c\u4e2a\u6570\u4e5f\u8981\u786e\u5b9a\uff0c\u8fd9\u8fd8\u662f\u4e0d\u7b26\u5408\u6211\u4eec\u7684\u9700\u6c42\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u51fd\u6570\u6307\u9488\nInt (*p)(int x, int y);\/\/*p\u7684\u62ec\u53f7\u5f88\u91cd\u8981\nInt max(int x , int y){\n\treturn (x&gt;y)? x : y;\n};\np=max;\np(3,4);\n\n\/\/\u5c06\u6307\u5411\u51fd\u6570\u7684\u6307\u9488\u53d8\u91cf\u4f5c\u4e3a\u51fd\u6570\u53c2\u6570\nint wm ( int x, int y, (*midfunc)(int,int)){\n\tInt result=midfunc(x,y);\n\tReturn result;\n};\nWm(3,5,max);\/\/\u51fd\u6570\u540d\u672c\u8eab\u5c31\u662f\u6307\u9488\nWm(3,5,p);\/\/\u4e5f\u884c\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u5c31\u9700\u8981\u7528\u5230\u6a21\u677f\u6765\u8fdb\u884c\u7c7b\u578b\u63a8\u5bfc\u4ee5\u4fbf\u8ba9\u6211\u4eec\u4f20\u5165\u4e00\u4e2a\u4e0d\u53d7\u7c7b\u578b\u9650\u5236\u7684\u51fd\u6570\u6307\u9488\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u901a\u7528\u7684\u6548\u679c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u6ce8\u610f\u6a21\u677f\u6210\u5458\u51fd\u6570\u7684\u5b9e\u73b0\u5fc5\u987b\u5199\u5728\u5934\u6587\u4ef6\u91cc\n\/\/CRS_defn.h\ntemplate &lt;typename F&gt;\nvoid CRS_defn::assignDefn(OGRLayer* tarLayer, int&amp; fieldIndex, F assignRule)\n{\n\tif (tarLayer == NULL || fieldIndex &lt; 0 || fieldIndex &gt;= tarLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() || assignRule == NULL) {\n\t\tstd::cout &lt;&lt; \"\u8f93\u5165\u65e0\u6548\" &lt;&lt; std::endl;\n\t\treturn;\n\t}\n\tfor (const auto&amp; oFeature : *tarLayer) {\n\t\toFeature-&gt;SetField(fieldIndex, assignRule());\n\t\ttarLayer-&gt;SetFeature(oFeature.get());\n\t}\n\t\/\/tarLayer-&gt;SyncToDisk();\n}\n\n\/\/\u5148\u4f20\u5165\u4e00\u4e2a\u7b80\u5355\u7684\u51fd\u6570\nint func1() {\n    return 1;\n}\n\n\/\/\u4e3b\u51fd\u6570\u4e2d\u8fdb\u884c\u8c03\u7528\n\/\/\u4fee\u6539\u5c5e\u6027\u5217\u7684\u503c\nint lastFieldIndex = poLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() - 1;\nCRS_defn::assignDefn(poLayer, lastFieldIndex, func1);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u529f\u80fd\u6bd4\u8f83\u7b80\u5355\uff0c\u50cf\u8fd9\u79cd\u8d4b\u4ee5\u4e00\u4e2a\u5e38\u503c\u7684\u9700\u6c42\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u7528\u4f20\u5165lambda\u51fd\u6570\u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u4e3b\u51fd\u6570\u4e2d\nint lastFieldIndex = poLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() - 1;\nCRS_defn::assignDefn(poLayer, lastFieldIndex, &#91;] {return 1; });<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u6211\u4eec\u6765\u5b9e\u73b0\u8fd9\u4e2a\u6620\u5c04\u529f\u80fd\u3002\u672c\u6765\u60f3\u7528static enum\u52a0switch\u6765\u5199\u7684\uff0c\u7136\u800c\u4e0d\u4f1a\uff0c\u7b97\u4e86\uff0c\u76f4\u63a5if\u5224\u65ad\u597d\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8fb9\u5c31\u6d89\u53ca\u5230\u4e86\u4e0a\u9762\u8bf4\u7684\u7f16\u7801\u95ee\u9898\uff0c\u591a\u6b21\u5c1d\u8bd5\u540e\u53d1\u73b0\u8fd9\u6837\u5199\u662fok\u7684<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/CRS_defn.h\ntemplate &lt;typename F&gt;\nvoid CRS_defn::assignDefn(OGRLayer* tarLayer, int&amp; fieldIndex, F assignRule)\n{\n\tif (tarLayer == NULL || fieldIndex &lt; 0 || fieldIndex &gt;= tarLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() || assignRule == NULL) {\n\t\tstd::cout &lt;&lt; \"\u8f93\u5165\u65e0\u6548\" &lt;&lt; std::endl;\n\t\treturn;\n\t}\n\tfor (const auto&amp; oFeature : *tarLayer) {\n\t\toFeature-&gt;SetField(fieldIndex, assignRule(oFeature.get()));\n\t\ttarLayer-&gt;SetFeature(oFeature.get());\n\t}\n\t\/\/tarLayer-&gt;SyncToDisk();\n}\n\/\/\u8ba1\u7b97\u51fd\u6570\nint func1(OGRFeature* poFeature) {\n\tstring xianType = poFeature-&gt;GetFieldAsString(6);\n\tif (xianType == u8\"\u5e02\u8f96\u533a\")\n\t\treturn 0;\n\telse if (xianType == u8\"\u53bf\")\n\t\treturn 1;\n\telse if (xianType == u8\"\u81ea\u6cbb\u53bf\")\n\t\treturn 2;\n\telse\n\t\treturn -1;\n}\n\/\/\u4e3b\u51fd\u6570\nGDALAllRegister();\nCPLSetConfigOption(\"GDAL_FILENAME_IS_UTF8\", \"NO\");\nconst char* chongqingDIR = \"C:\/Users\/23005\/Desktop\/chongqing\/\u91cd\u5e86.shp\";\nGDALDatasetUniquePtr poDS(GDALDataset::Open(chongqingDIR, GDAL_OF_VECTOR || GDAL_OF_UPDATE));\nif (poDS == NULL)\n{\n\tprintf(\"Open failed.\\n\");\n\texit(1);\n}\nCPLSetConfigOption(\"SHAPE_ENCODING\", \"\");\nOGRLayer* poLayer = poDS-&gt;GetLayer(0);\n\/\/\u4fee\u6539\u5c5e\u6027\u5217\u7684\u503c\nint lastFieldIndex = poLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() - 1;\n\nCRS_defn::assignDefn(poLayer, lastFieldIndex, func1);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6d4b\u8bd5\u4e00\u4e0b\u80fd\u5426\u5c06\u4e2d\u6587\u6b63\u5e38\u5199\u5165\u5c5e\u6027\u8868\uff0c\u679c\u7136\u4e0d\u52a0u8\u524d\u7f00\u7ed3\u679c\u5c31\u662f\u4e71\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GDALAllRegister();\nCPLSetConfigOption(\"GDAL_FILENAME_IS_UTF8\", \"NO\");\nconst char* chongqingDIR = \"C:\/Users\/23005\/Desktop\/chongqing\/\u91cd\u5e86.shp\";\nGDALDatasetUniquePtr poDS(GDALDataset::Open(chongqingDIR, GDAL_OF_VECTOR || GDAL_OF_UPDATE));\nif (poDS == NULL)\n{\n\tprintf(\"Open failed.\\n\");\n\texit(1);\n}\nOGRLayer* poLayer = poDS-&gt;GetLayer(0);\n\n\/\/\u65b0\u5efastring\u7c7b\u578b\u5c5e\u6027\u8868\u5217\u5e76\u63d2\u5165\nOGRFieldDefn* testFieldDefn = new OGRFieldDefn(\"testStringDefn\", OFTString);\nCRS_defn::addDefn(poLayer, testFieldDefn);\ndelete testFieldDefn;\n\n\/\/\u4fee\u6539\u5c5e\u6027\u5217\u7684\u503c\uff0c\u6ce8\u610futf-8\u7f16\u7801\nint lastFieldIndex = poLayer-&gt;GetLayerDefn()-&gt;GetFieldCount() - 1;\nCRS_defn::assignDefn(poLayer, lastFieldIndex, &#91;](OGRFeature* poFeature) {return u8\"\u4f60\u597d1\"; });<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u5f00\u53d1\u65f6\u8fd9\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5e94\u8be5\u662f\u4e00\u4e2a\u4fe1\u53f7\uff0c\u7528\u6765\u4f20\u9012\u662f\u5426\u6210\u529f\u4fee\u6539\uff0c\u800c\u4e0d\u662f\u73b0\u5728\u7684void<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8981\u7d20\u76f8\u5173<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b0\u5efaCRS_feature\u7c7b\u5b9e\u73b0\u8981\u7d20\u76f8\u5173\u64cd\u4f5c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include \"gdal_priv.h\"\n#include \"ogrsf_frmts.h\"\n#include &lt;iostream&gt;\n\nclass CRS_feature {\npublic:\n\tstatic void addFeature(OGRLayer*);\n\tstatic void deleteFeature(OGRLayer*, long);\n\tstatic void moveFeature(OGRLayer*, long, const std::vector&lt;float&gt;&amp;);\n};<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u5220\u9664\u8981\u7d20<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5220\u9664\u8981\u7d20\u5f88\u7b80\u5355\uff0c\u8c03\u7528api\u5c31\u4e00\u53e5\u8bdd<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u6839\u636eFID\u5220\u9664\u6307\u5b9a\u8981\u7d20\nvoid CRS_feature::deleteFeature(OGRLayer* tarLayer, long FID) {\n\ttarLayer-&gt;DeleteFeature(FID);\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u4fee\u6539\u8981\u7d20<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fee\u6539\u8981\u7d20\u4e2d\u96c6\u5408\u4f53\u7684\u5750\u6807\u3002\u4e00\u5f00\u59cb\u7528auto\u5faa\u73af\u53d1\u73b0\u5e76\u4e0d\u80fd\u5bf9\u6e90\u6570\u636e\u751f\u6548\uff0c\u53ea\u80fd\u901a\u8fc7\u6307\u9488\u6765\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u7b80\u5355\u8bf4\u660e\u4e00\u4e0bpolygon\u7684\u683c\u5f0f\u3002OGRPolygon\u5927\u6982\u662f\u6211\u4eec\u6700\u5e38\u78b0\u5230\u7684\u8981\u7d20\u7c7b\u578b\uff0c\u4e0a\u9762\u77e2\u91cf\u57fa\u672c\u64cd\u4f5c\u7684\u4ee3\u7801\u5bf9polygon\u7684\u64cd\u4f5c\u592a\u7b80\u5355\u7c97\u66b4\u4e86\u3002\u5b9e\u9645\u4e0apolygon\u53ef\u80fd\u7531\u4e8e\u5b58\u5728\u7a7a\u6d1e\u95ee\u9898\u800c\u6709\u6570\u6761\u73af\uff08OGRLinearRing\uff09\uff0c\u5982\u679cpolygon\u662f\u7b80\u5355\u591a\u8fb9\u5f62\uff0c\u90a3\u5c31\u53ea\u6709\u4e00\u6761\u5916\u73af\u3002\u81f3\u4e8esetPoint\u8fd9\u4e2a\u51fd\u6570\u5e94\u8be5\u8fd8\u662f\u590d\u5236\u4e86\u4f20\u5165\u70b9\u7684\u5750\u6807\uff0c\u4e0d\u7528\u62c5\u5fc3\u76f8\u5173\u91ca\u653e\u95ee\u9898\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u5e73\u79fb\u8981\u7d20\uff08\u7b80\u5355\u591a\u8fb9\u5f62\uff09\nvoid CRS_feature::moveFeature(OGRLayer* tarLayer, long FID, const std::vector&lt;float&gt;&amp; offset) {\n\tOGRFeature* tarFeature = tarLayer-&gt;GetFeature(FID);\n\tOGRGeometry* tarGeometry = tarFeature-&gt;GetGeometryRef();\n\tOGRPolygon* poPolygon = tarGeometry-&gt;toPolygon();\n\tOGRLinearRing* tarRing = poPolygon-&gt;getExteriorRing();\n\tfor (int i = 0; i &lt; tarRing-&gt;getNumPoints(); i++) {\n\t\tOGRPoint* originPoint = new OGRPoint();\n\t\ttarRing-&gt;getPoint(i, originPoint);\n\t\toriginPoint-&gt;setX(originPoint-&gt;getX() + offset&#91;0]);\n\t\toriginPoint-&gt;setY(originPoint-&gt;getY() + offset&#91;1]);\n\t\ttarRing-&gt;setPoint(i, originPoint);\n\t\tdelete originPoint;\n\t}\n\ttarLayer-&gt;SetFeature(tarFeature);\n\ttarLayer-&gt;SyncToDisk();\n\tOGRFeature::DestroyFeature(tarFeature);\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u63d2\u5165\u8981\u7d20<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b0\u589e\u8981\u7d20\uff0c\u9700\u8981\u51c6\u5907\u597d\u65b0\u8981\u7d20\u7684\u96c6\u5408\u4f53\u548c\u5c5e\u6027\uff0c\u7ed1\u5b9a\u540e\u7528\u56fe\u5c42\u52a0\u5165\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u65b0\u589e\u8981\u7d20\nvoid CRS_feature::addFeature(OGRLayer* tarLayer) {\n\t\/\/\u62ff\u56fe\u5c42\u4e2d\u7b2c\u4e00\u4e2a\u8981\u7d20\uff08\u4e07\u5dde\u533a\uff09\u5e73\u79fb\u4e00\u4e0b\uff0c\u4f5c\u4e3a\u65b0\u8981\u7d20\u7684\u51e0\u4f55\u4f53\n\tOGRFeature* copyFeature = tarLayer-&gt;GetFeature(0);\n\tOGRPolygon* newPolygon = (OGRPolygon*)OGRGeometryFactory::createGeometry(wkbPolygon);\n\tOGRLinearRing* newLinearRing = (OGRLinearRing*)OGRGeometryFactory::createGeometry(wkbLinearRing);\n\tOGRPoint newPoint;\n\tauto copyGeometry = copyFeature-&gt;GetGeometryRef();\n\tauto copyPolygon = copyGeometry-&gt;toPolygon();\n\tauto copyRing = copyPolygon-&gt;getExteriorRing();\n\tfor (auto copyPoint : copyRing) {\n\t\tnewPoint.setX(copyPoint.getX() + 1.0);\n\t\tnewPoint.setY(copyPoint.getY() + 1.0);\n\t\tnewLinearRing-&gt;addPoint(&amp;newPoint);\n\t}\n\t\/\/\u5c06\u73af\u5c01\u95ed\n\tnewLinearRing-&gt;closeRings();\n\t\/\/\u5c06\u73af\u8d4b\u7ed9\u591a\u8fb9\u5f62\u4f5c\u4e3a\u5916\u73af\n\tnewPolygon-&gt;addRing(newLinearRing);\n\t\/\/\u6839\u636e\u539f\u56fe\u5c42\u5c5e\u6027\u65b0\u5efa\u4e00\u4e2a\u5143\u7d20\n\tOGRFeature* newFeature = OGRFeature::CreateFeature(tarLayer-&gt;GetLayerDefn());\n\t\/\/\u586b\u5165\u5c5e\u6027\uff08\u586b\u4e2aname\uff0c\u5176\u4ed6\u61d2\u5f97\u586b\uff09\n\tnewFeature-&gt;SetField(1, u8\"\u4e07\u5dde\u533a\u5e73\u79fb\"); \n\t\/\/\u7ed1\u5b9a\u51e0\u4f55\u4f53\n\tnewFeature-&gt;SetGeometry(newPolygon);\n\t\/\/\u5c06\u8981\u7d20\u52a0\u5165\u56fe\u5c42\n\ttarLayer-&gt;CreateFeature(newFeature);\n\t\/\/\u91ca\u653e\u76f8\u5173\u6307\u9488\n\tOGRFeature::DestroyFeature(newFeature);\n\tstd::cout &lt;&lt; \"\u63d2\u5165\u8981\u7d20\u6210\u529f\" &lt;&lt; std::endl;\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u9009\u62e9\u8981\u7d20<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6309\u7a7a\u95f4\u8303\u56f4\u9009\u62e9\u8981\u7d20\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528SetSpatialFilter\u8bbe\u7f6e\u7a7a\u95f4\u8fc7\u6ee4\u5668\uff0c\u4e5f\u53ef\u4ee5\u7528SetSpatialFilterRect\u4f20\u5165\u4e00\u4e2a\u77e9\u5f62\u8303\u56f4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u6309\u56db\u81f3\u8303\u56f4\u7684\u56db\u5206\u4e4b\u4e00\uff08\u5de6\u4e0b\u89d2\uff09\u9009\u62e9\u5143\u7d20\nvoid CRS_feature::selectBySpatialFilter(OGRLayer* tarLayer) {\n\tOGREnvelope tarLayerExtent;\n\ttarLayer-&gt;GetExtent(&amp;tarLayerExtent);\n\ttarLayerExtent.MaxX = tarLayerExtent.MaxX - (tarLayerExtent.MaxX - tarLayerExtent.MinX) \/ 2;\n\ttarLayerExtent.MaxY = tarLayerExtent.MaxY - (tarLayerExtent.MaxY - tarLayerExtent.MinY) \/ 2;\n\ttarLayer-&gt;SetSpatialFilterRect(tarLayerExtent.MinX, tarLayerExtent.MinY, tarLayerExtent.MaxX, tarLayerExtent.MaxY);\n\t\/\/\u91cd\u7f6e\u9009\u62e9\n\t\/\/tarLayer-&gt;SetSpatialFilter(NULL);\n\t\/\/\u8bfb\u53d6\u6240\u6709\u8981\u7d20\u7684\u6240\u6709\u5c5e\u6027\n\tfor (const auto&amp; poFeature : tarLayer) {\n\t\tfor (auto&amp;&amp; oField : *poFeature)\n\t\t{\n\t\t\tif (oField.IsUnset())\n\t\t\t{\n\t\t\t\tprintf(\"(unset),\");\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tif (oField.IsNull())\n\t\t\t{\n\t\t\t\tprintf(\"(null),\");\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tswitch (oField.GetType())\n\t\t\t{\n\t\t\tcase OFTInteger:\n\t\t\t\tprintf(\"%d,\", oField.GetInteger());\n\t\t\t\tbreak;\n\t\t\tcase OFTInteger64:\n\t\t\t\tprintf(CPL_FRMT_GIB \",\", oField.GetInteger64());\n\t\t\t\tbreak;\n\t\t\tcase OFTReal:\n\t\t\t\tprintf(\"%.3f,\", oField.GetDouble());\n\t\t\t\tbreak;\n\t\t\tcase OFTString:\n\t\t\t\t\/\/ GetString() returns a C string\n\t\t\t\tprintf(\"%s,\", oField.GetString());\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\t\/\/ Note: we use GetAsString() and not GetString(), since\n\t\t\t\t\/\/ the later assumes the field type to be OFTString while the\n\t\t\t\t\/\/ former will do a conversion from the original type to string.\n\t\t\t\tprintf(\"%s,\", oField.GetAsString());\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t\tstd::cout &lt;&lt; std::endl;\n\t}\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6309\u5c5e\u6027\u9009\u62e9\u89c1\u4e0b\u4e00\u7ae0SQL\u8bf4\u660e<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">SQL\u8bf4\u660e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528SQL\u8fdb\u884c\u5c5e\u6027\u67e5\u8be2\/\u7b5b\u9009<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/gdal.org\/user\/ogr_sql_dialect.html\" target=\"_blank\"  rel=\"nofollow\" >OGR SQL dialect \u2014 GDAL documentation<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SQL\u67e5\u8be2\u53ef\u4ee5\u4ece\u6570\u636e\u6e90\u5f00\u59cb\uff08\u5b8c\u6574SQL\u8bed\u53e5\uff09\uff0c\u4e5f\u53ef\u4ee5\u4ece\u56fe\u5c42\u67e5\u8be2\uff08WHERE\u5b50\u53e5\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610fGDALDatasetUniquePtr\u4f20\u5165\u4e00\u5b9a\u662f\u5f15\u7528\uff0c\u53e6\u5916\u4e2d\u6587\u7684\u8bdd\u8981\u7528\u8f6c\u4e49\u7b26\\\u524d\u540e\u52a0\u4e0a\u5f15\u53f7\uff0c\u5e76\u4e14\u7ed3\u679c\u8981\u56de\u6536\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u6309\u5c5e\u6027\u9009\u62e9\u8981\u7d20(\u8f93\u5165\u6570\u636e\u6e90)\nvoid CRS_feature::selectByAttribute(GDALDatasetUniquePtr&amp; tarDS) {\n\tstring tarLayerName = tarDS-&gt;GetLayer(0)-&gt;GetName();\n\tstring SQLCommand = \"SELECT * FROM \\\"\" + tarLayerName + \"\\\" WHERE testDefn = 2\";\n\tOGRLayer* tarLayer = tarDS-&gt;ExecuteSQL(SQLCommand.c_str(), NULL, NULL);\n\t\/\/\u8bfb\u53d6\u6240\u6709\u8981\u7d20\u7684\u6240\u6709\u5c5e\u6027\n\tfor (const auto&amp; poFeature : tarLayer) {\n\t\tfor (auto&amp;&amp; oField : *poFeature)\n\t\t{\n\t\t\tif (oField.IsUnset())\n\t\t\t{\n\t\t\t\tprintf(\"(unset),\");\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tif (oField.IsNull())\n\t\t\t{\n\t\t\t\tprintf(\"(null),\");\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tswitch (oField.GetType())\n\t\t\t{\n\t\t\tcase OFTInteger:\n\t\t\t\tprintf(\"%d,\", oField.GetInteger());\n\t\t\t\tbreak;\n\t\t\tcase OFTInteger64:\n\t\t\t\tprintf(CPL_FRMT_GIB \",\", oField.GetInteger64());\n\t\t\t\tbreak;\n\t\t\tcase OFTReal:\n\t\t\t\tprintf(\"%.3f,\", oField.GetDouble());\n\t\t\t\tbreak;\n\t\t\tcase OFTString:\n\t\t\t\t\/\/ GetString() returns a C string\n\t\t\t\tprintf(\"%s,\", oField.GetString());\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\t\/\/ Note: we use GetAsString() and not GetString(), since\n\t\t\t\t\/\/ the later assumes the field type to be OFTString while the\n\t\t\t\t\/\/ former will do a conversion from the original type to string.\n\t\t\t\tprintf(\"%s,\", oField.GetAsString());\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t\tstd::cout &lt;&lt; std::endl;\n\t}\n\ttarDS-&gt;ReleaseResultSet(tarLayer);\n}\n\n\/\/\u6309\u5c5e\u6027\u9009\u62e9\u8981\u7d20(\u8f93\u5165\u6570\u636e\u6e90)\nvoid CRS_feature::selectByAttribute(OGRLayer* tarLayer) {\n\tstring SQLCommand = \"testDefn = 2\";\n\ttarLayer-&gt;SetAttributeFilter(SQLCommand.c_str());\n\t\/\/\u8bfb\u53d6\u6240\u6709\u8981\u7d20\u7684\u6240\u6709\u5c5e\u6027\n\tfor (const auto&amp; poFeature : tarLayer) {\n\t\tfor (auto&amp;&amp; oField : *poFeature)\n\t\t{\n\t\t\tif (oField.IsUnset())\n\t\t\t{\n\t\t\t\tprintf(\"(unset),\");\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tif (oField.IsNull())\n\t\t\t{\n\t\t\t\tprintf(\"(null),\");\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\tswitch (oField.GetType())\n\t\t\t{\n\t\t\tcase OFTInteger:\n\t\t\t\tprintf(\"%d,\", oField.GetInteger());\n\t\t\t\tbreak;\n\t\t\tcase OFTInteger64:\n\t\t\t\tprintf(CPL_FRMT_GIB \",\", oField.GetInteger64());\n\t\t\t\tbreak;\n\t\t\tcase OFTReal:\n\t\t\t\tprintf(\"%.3f,\", oField.GetDouble());\n\t\t\t\tbreak;\n\t\t\tcase OFTString:\n\t\t\t\t\/\/ GetString() returns a C string\n\t\t\t\tprintf(\"%s,\", oField.GetString());\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\t\/\/ Note: we use GetAsString() and not GetString(), since\n\t\t\t\t\/\/ the later assumes the field type to be OFTString while the\n\t\t\t\t\/\/ former will do a conversion from the original type to string.\n\t\t\t\tprintf(\"%s,\", oField.GetAsString());\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t\tstd::cout &lt;&lt; std::endl;\n\t}\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">OGRSQL\u7684\u5185\u5bb9\u8fd8\u4e0d\u5c11\uff0c\u7b49\u7528\u5230\u4e86\u518d\u6765\u66f4\u65b0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u77e2\u91cf\u6570\u636e\u4fdd\u5b58<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f85\u66f4\u65b0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00\uff0cGDAL\u914d\u7f6e\uff0c\u5750\u6807\u7cfb\uff0c\u77e2\u91cf\u6587\u4ef6\u64cd\u4f5c\uff08GEOS\u5e93\uff09\u2014\u2014\u66f4\u65b0\u4e2d\u3002\u3002\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[25],"tags":[],"class_list":["post-608","post","type-post","status-publish","format-standard","hentry","category-gis"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts\/608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/comments?post=608"}],"version-history":[{"count":22,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts\/608\/revisions"}],"predecessor-version":[{"id":803,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/posts\/608\/revisions\/803"}],"wp:attachment":[{"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/media?parent=608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/categories?post=608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gislxz.com\/index.php\/wp-json\/wp\/v2\/tags?post=608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}