{"id":29793,"date":"2025-04-20T13:05:59","date_gmt":"2025-04-20T05:05:59","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/29793.html"},"modified":"2025-04-20T13:05:59","modified_gmt":"2025-04-20T05:05:59","slug":"%e3%80%90gee%e3%80%91%e4%bb%80%e4%b9%88%e6%97%b6%e5%80%99%e5%9c%a8%e5%ae%a2%e6%88%b7%e7%ab%af%ef%bc%9f%e4%bb%80%e4%b9%88%e6%97%b6%e5%80%99%e5%9c%a8%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/29793.html","title":{"rendered":"\u3010GEE\u3011\u4ec0\u4e48\u65f6\u5019\u5728\u5ba2\u6237\u7aef\uff1f\u4ec0\u4e48\u65f6\u5019\u5728\u670d\u52a1\u5668\uff1f"},"content":{"rendered":"<p>\u5728GEE\u7f16\u5199\u4ee3\u7801\u7684\u65f6\u5019&#xff0c;\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u7684\u4ee3\u7801\u4e0d\u80fd\u6df7\u7528\u3002\u90a3\u4e48\u4ec0\u4e48\u65f6\u5019\u5728\u5ba2\u6237\u7aef&#xff1f;\u4ec0\u4e48\u65f6\u5019\u5728\u670d\u52a1\u5668\u7aef\u5462&#xff1f;<\/p>\n<p>\u6bd4\u55bb&#xff1a;\u5199\u83dc\u8c31&#xff08;\u5ba2\u6237\u7aef&#xff09; vs. \u5927\u53a8\u5728\u53a8\u623f\u505a\u83dc&#xff08;\u670d\u52a1\u5668\u7aef&#xff09;<\/p>\n<ul>\n<li>\n<p>\u4f60&#xff08;\u5ba2\u6237\u7aef \/ Client&#xff09;&#xff1a;\u00a0\u4f60\u5728\u4f60\u7684\u7535\u8111\u524d&#xff0c;\u7528\u6d4f\u89c8\u5668\u91cc\u7684 JavaScript \u4ee3\u7801\u7f16\u8f91\u5668\u5199\u201c\u83dc\u8c31\u201d\u3002\u8fd9\u4e2a\u83dc\u8c31\u63cf\u8ff0\u4e86\u8981\u505a\u4ec0\u4e48\u83dc&#xff08;\u6bd4\u5982\u201c\u5e74\u5ea6\u6c34\u4f53\u9762\u79ef\u53d8\u5316\u56fe\u201d&#xff09;&#xff0c;\u9700\u8981\u4ec0\u4e48\u201c\u539f\u6599\u201d\u7684\u89c4\u683c&#xff08;\u54ea\u4e2a\u536b\u661f\u6570\u636e\u00a0l8\u3001\u54ea\u4e2a\u533a\u57df\u00a0geometry\u3001\u54ea\u4e2a\u65f6\u95f4\u6bb5\u00a0year&#xff09;&#xff0c;\u4ee5\u53ca\u8be6\u7ec6\u7684\u201c\u70f9\u996a\u6b65\u9aa4\u201d&#xff08;\u8fc7\u6ee4\u00a0filter\u3001\u5e94\u7528\u6c34\u4f53\u7b97\u6cd5\u00a0waterMask\u3001\u8ba1\u7b97\u9762\u79ef\u00a0reduceRegion\u3001\u753b\u56fe\u00a0ui.Chart&#xff09;\u3002<\/p>\n<ul>\n<li>\n<p>\u4f60\u7684\u7535\u8111&#xff08;\u6d4f\u89c8\u5668&#xff09;\u8d1f\u8d23\u8fd0\u884c\u8fd9\u4e9b\u5199\u83dc\u8c31\u7684 JavaScript \u4ee3\u7801&#xff0c;\u7ec4\u7ec7\u903b\u8f91&#xff0c;\u5b9a\u4e49\u53c2\u6570\u3002<\/p>\n<\/li>\n<li>\n<p>\u901f\u5ea6\u5feb&#xff0c;\u9002\u5408\u5904\u7406\u7b80\u5355\u7684\u903b\u8f91\u3001\u7528\u6237\u754c\u9762\u4ea4\u4e92\u3002<\/p>\n<\/li>\n<li>\n<p>\u6ca1\u6709\u539f\u6599\u548c\u4e13\u4e1a\u53a8\u5177&#xff1a;\u4f60\u7684\u7535\u8111\u6ca1\u6709\u6d77\u91cf\u7684\u536b\u661f\u6570\u636e&#xff0c;\u4e5f\u6ca1\u6709\u5f3a\u5927\u7684\u5e76\u884c\u8ba1\u7b97\u80fd\u529b\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Google \u7684\u670d\u52a1\u5668&#xff08;\u670d\u52a1\u5668\u7aef \/ Server&#xff09;&#xff1a;\u00a0\u5c31\u50cf\u4e00\u4e2a\u62e5\u6709\u5de8\u5927\u98df\u6750\u5e93&#xff08;PB \u7ea7\u7684\u536b\u661f\u6570\u636e&#xff09;\u548c\u4e13\u4e1a\u81ea\u52a8\u5316\u53a8\u623f&#xff08;\u5206\u5e03\u5f0f\u8ba1\u7b97\u96c6\u7fa4&#xff09;\u7684\u5927\u53a8\u56e2\u961f\u3002<\/p>\n<ul>\n<li>\n<p>\u4ed6\u4eec\u63a5\u6536\u5230\u4f60\u5199\u597d\u7684\u201c\u83dc\u8c31\u201d&#xff08;\u4f60\u901a\u8fc7 GEE API \u53d1\u9001\u7684\u8ba1\u7b97\u6307\u4ee4&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u4ed6\u4eec\u6839\u636e\u83dc\u8c31&#xff0c;\u5728\u81ea\u5df1\u7684\u53a8\u623f\u91cc&#xff0c;\u7528\u81ea\u5df1\u7684\u98df\u6750\u548c\u8bbe\u5907&#xff0c;\u5b9e\u9645\u5730\u8fdb\u884c\u70f9\u996a&#xff08;\u6267\u884c\u6570\u636e\u7b5b\u9009\u3001\u8ba1\u7b97\u3001\u5206\u6790&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u8ba1\u7b97\u80fd\u529b\u5f3a&#xff0c;\u53ef\u4ee5\u5e76\u884c\u5904\u7406\u5927\u91cf\u6570\u636e\u3002<\/p>\n<\/li>\n<li>\n<p>\u76f4\u63a5\u63a5\u89e6\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u5177\u4f53\u6765\u8bf4&#xff0c;\u5728 GEE \u4ee3\u7801\u4e2d&#xff1a;<\/p>\n<p><span style=\"color:#fe2c24\">\u4ec0\u4e48\u65f6\u5019\u662f\u5728\u201c\u5ba2\u6237\u7aef\u201d (\u4f60\u7684\u6d4f\u89c8\u5668)&#xff1f;<\/span><\/p>\n<li>\n<p>\u6807\u51c6\u7684 JavaScript \u4ee3\u7801\u6267\u884c&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5b9a\u4e49\u53d8\u91cf&#xff1a;var year &#061; 2020;,\u00a0var threshold &#061; 0.5;,\u00a0var coords &#061; [&#8230;];<\/p>\n<\/li>\n<li>\n<p>\u63a7\u5236\u6d41\u8bed\u53e5&#xff1a;if (&#8230;) {&#8230;},\u00a0for (&#8230;) {&#8230;},\u00a0while (&#8230;) {&#8230;}\u00a0&#xff08;\u8fd9\u4e9b\u5faa\u73af\u548c\u5224\u65ad\u672c\u8eab\u5728\u6d4f\u89c8\u5668\u8fd0\u884c&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u6253\u5370\u5230\u63a7\u5236\u53f0&#xff1a;print(&#039;Starting analysis&#8230;&#039;);<\/p>\n<\/li>\n<li>\n<p>\u521b\u5efa UI \u5143\u7d20&#xff1a;var chart &#061; ui.Chart&#8230;; print(chart);\u00a0&#xff08;\u521b\u5efa\u56fe\u8868\u5bf9\u8c61\u672c\u8eab&#xff0c;\u5e76\u8bf7\u6c42\u663e\u793a&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u8c03\u7528\u5730\u56fe\u51fd\u6570&#xff1a;Map.setCenter(&#8230;),\u00a0Map.addLayer(&#8230;)\u00a0&#xff08;\u8fd9\u4e9b\u51fd\u6570\u8c03\u7528\u672c\u8eab\u5728\u5ba2\u6237\u7aef\u53d1\u8d77&#xff0c;\u544a\u8bc9\u670d\u52a1\u5668\u8981\u505a\u4ec0\u4e48&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u5b9a\u4e49 GEE \u5bf9\u8c61\u548c\u64cd\u4f5c&#xff08;\u5199\u83dc\u8c31\u6b65\u9aa4&#xff09;&#xff1a;\u00a0\u5f53\u4f60\u5199\u00a0var l8 &#061; ee.ImageCollection(&#039;LANDSAT\/LC08\/C02\/T1_L2&#039;);\u00a0\u6216\u00a0var filtered &#061; l8.filterBounds(geometry);\u00a0\u65f6&#xff0c;\u8fd9\u884c JavaScript \u4ee3\u7801\u662f\u5728\u5ba2\u6237\u7aef\u6267\u884c\u7684\u3002\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u53eb\u505a\u00a0l8\u00a0\u6216\u00a0filtered\u00a0\u7684\u4ee3\u7406\u5bf9\u8c61 (proxy object)\u3002\u8fd9\u4e2a\u5bf9\u8c61\u672c\u8eab\u5f88\u5c0f&#xff0c;\u5b83\u53ea\u662f\u4e00\u4e2a\u6307\u5411\u670d\u52a1\u5668\u7aef\u6570\u636e\u6216\u8ba1\u7b97\u6307\u4ee4\u7684\u5f15\u7528&#xff0c;\u5c31\u50cf\u83dc\u8c31\u4e0a\u7684\u4e00\u4e2a\u6b65\u9aa4\u540d\u79f0\u3002\u8fd9\u65f6\u5e76\u6ca1\u6709\u771f\u6b63\u5904\u7406\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<p><span style=\"color:#fe2c24\">\u4ec0\u4e48\u65f6\u5019\u662f\u5728\u201c\u670d\u52a1\u5668\u7aef\u201d (Google \u7684\u670d\u52a1\u5668)&#xff1f;<\/span><\/p>\n<li>\n<p>\u6267\u884c GEE \u7684\u8ba1\u7b97\u5bc6\u96c6\u578b\u64cd\u4f5c&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5f53\u4f60\u8bf7\u6c42\u7ed3\u679c\u65f6&#xff0c;\u670d\u52a1\u5668\u624d\u5f00\u59cb\u6839\u636e\u4f60\u4e4b\u524d\u5b9a\u4e49\u7684\u201c\u83dc\u8c31\u201d&#xff08;\u4ee3\u7406\u5bf9\u8c61\u94fe&#xff09;\u8fdb\u884c\u8ba1\u7b97\u3002\u8bf7\u6c42\u7ed3\u679c\u7684\u65b9\u5f0f\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\n<p>Map.addLayer(eeObject, &#8230;)&#xff1a;\u670d\u52a1\u5668\u9700\u8981\u8ba1\u7b97\u00a0eeObject\u00a0\u624d\u80fd\u5728\u5730\u56fe\u4e0a\u6e32\u67d3\u74e6\u7247\u3002<\/p>\n<\/li>\n<li>\n<p>eeObject.getInfo()&#xff1a;\u660e\u786e\u8981\u6c42\u670d\u52a1\u5668\u8ba1\u7b97\u00a0eeObject\u00a0\u5e76\u5c06\u7ed3\u679c&#xff08;\u901a\u5e38\u662f\u5c11\u91cf\u6570\u636e&#xff0c;\u5982\u4e00\u4e2a\u6570\u5b57\u3001\u4e00\u4e2a\u5c0f\u5217\u8868\/\u5b57\u5178&#xff09;\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>eeObject.evaluate(function(result) {&#8230;})&#xff1a;\u7c7b\u4f3c\u00a0getInfo()&#xff0c;\u4f46\u5f02\u6b65\u6267\u884c&#xff0c;\u7ed3\u679c\u5728\u56de\u8c03\u51fd\u6570\u4e2d\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<\/li>\n<li>\n<p>Export.image.toDrive(&#8230;)\u00a0\/\u00a0Export.table.toDrive(&#8230;)\u00a0\u7b49&#xff1a;\u8981\u6c42\u670d\u52a1\u5668\u6267\u884c\u8ba1\u7b97\u5e76\u5c06\u7ed3\u679c\u4fdd\u5b58\u5230\u4f60\u7684 Google Drive \u7b49\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9 GEE \u65b9\u6cd5\u65f6&#xff1a;\u5f53\u4f60\u628a\u4e00\u4e2a JavaScript \u51fd\u6570\u4f20\u9012\u7ed9\u50cf\u00a0.map()\u00a0\u6216\u00a0.iterate()\u00a0\u8fd9\u6837\u7684 GEE \u65b9\u6cd5\u65f6&#xff0c;\u8fd9\u4e2a\u51fd\u6570\u7684\u5185\u5bb9\u4f1a\u88ab\u53d1\u9001\u5230\u670d\u52a1\u5668&#xff0c;\u5e76\u5728\u670d\u52a1\u5668\u4e0a\u5bf9\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u3002<\/p>\n<p> collection.map(function(image) {<br \/>\n  \/\/ \u8fd9\u90e8\u5206\u4ee3\u7801\u5c06\u5728\u670d\u52a1\u5668\u4e0a\u5bf9 collection \u4e2d\u7684\u6bcf\u4e2a image \u6267\u884c<br \/>\n  var processed &#061; image.multiply(2).add(1);<br \/>\n  return processed;<br \/>\n}); <\/p>\n<p>content_copydownload<\/p>\n<p> Use code\u00a0with caution.JavaScript<\/li>\n<li>\n<p>\u6267\u884c\u00a0reduceRegion,\u00a0reduceColumns,\u00a0classify,\u00a0expression\u00a0\u7b49\u5206\u6790\u51fd\u6570&#xff1a;\u00a0\u8fd9\u4e9b\u590d\u6742\u7684\u8ba1\u7b97\u663e\u7136\u53d1\u751f\u5728\u670d\u52a1\u5668\u7aef\u3002<\/p>\n<\/li>\n<li>\n<p>\u6267\u884c\u00a0ee.Algorithms.If&#xff1a;\u00a0\u6761\u4ef6\u5224\u65ad\u548c\u5206\u652f\u9009\u62e9\u90fd\u5728\u670d\u52a1\u5668\u7aef\u8fdb\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<p>\u5173\u952e\u70b9\u548c\u6613\u6df7\u6dc6\u5904&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5ef6\u8fdf\u6267\u884c (Deferred Execution):\u00a0\u5b9a\u4e49 GEE \u5bf9\u8c61\u548c\u64cd\u4f5c\u94fe&#xff08;\u5199\u83dc\u8c31&#xff09;\u5e76\u4e0d\u4f1a\u7acb\u5373\u6267\u884c\u8ba1\u7b97\u3002\u8ba1\u7b97\u88ab\u63a8\u8fdf\u5230\u4f60\u660e\u786e\u8bf7\u6c42\u7ed3\u679c&#xff08;\u5982\u00a0getInfo,\u00a0Map.addLayer&#xff09;\u65f6\u624d\u5728\u670d\u52a1\u5668\u4e0a\u89e6\u53d1\u3002<\/p>\n<\/li>\n<li>\n<p>\u4ee3\u7406\u5bf9\u8c61 (Proxy 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