{"id":6238,"date":"2018-12-21T11:31:29","date_gmt":"2018-12-21T02:31:29","guid":{"rendered":"https:\/\/gunmagisgeek.com\/wordpress\/?p=6238"},"modified":"2022-07-01T02:41:35","modified_gmt":"2022-06-30T17:41:35","slug":"gee%e5%85%a5%e9%96%80%e9%9b%b2%e3%81%ae%e3%81%aa%e3%81%84%e7%94%bb%e5%83%8f%e3%82%92%e6%8e%a2%e3%81%99%ef%bc%8f%e9%9b%b2%e3%82%92%e6%b6%88%e3%81%99","status":"publish","type":"post","link":"https:\/\/gunmagisgeek.com\/blog\/googleearthengine\/6238","title":{"rendered":"[Google Earth Engine\u5165\u9580]\u96f2\u306e\u306a\u3044\u753b\u50cf\u3092\u63a2\u3059\uff0f\u96f2\u3092\u6d88\u3059"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u885b\u661f\u5199\u771f\u306e\u4e2d\u306b\u306f\u3001\u64ae\u5f71\u7bc4\u56f2\u306e\u307b\u3068\u3093\u3069\u304c\u96f2\u306b\u8986\u308f\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u3082\u306e\u3082\u591a\u6570\u3042\u308a\u307e\u3059\u3002<br \/>\n\u306a\u308b\u3079\u304f\u96f2\u306b\u8986\u308f\u308c\u3066\u3044\u306a\u3044\u885b\u661f\u5199\u771f\u304c\u898b\u3064\u304b\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u7d5e\u308a\u8fbc\u307f\u3092\u304b\u3051\u305f\u671f\u9593\u3084\u4f4d\u7f6e\u306b\u3088\u3063\u3066\u306f\u3001\u96f2\u304c\u8986\u308f\u308c\u3066\u3044\u306a\u3044\u753b\u50cf\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u30a4\u30e1\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u306a\u304b\u304b\u3089\u88ab\u96f2\u7387\u306e\u4f4e\u3044\u30a4\u30e1\u30fc\u30b8\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u3068\u3001\u8907\u6570\u306e\u30a4\u30e1\u30fc\u30b8\u3092\u5408\u6210\u3057\u3066\u96f2\u3092\u524a\u9664\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a18\u8f09\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30ed\u30fc\u30c9\u3059\u308b<\/h2>\n<pre class=\"lang:js decode:true \">\/\/ 1\u5e74\u9593\u306eLandsat 8 TOA\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\nvar ImageCollection = ee.ImageCollection('LANDSAT\/LC08\/C01\/T1_TOA')\n    .filterDate('2016-01-01', '2016-12-31')\n    .filterBounds(geometry)\n\nvar image = ImageCollection.first()\n   \nMap.addLayer(image, {bands: ['B4', 'B3', 'B2'], max: 0.3});<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude1-1024x666.png\" alt=\"\" width=\"680\" height=\"442\" class=\"alignnone size-large wp-image-6267 border\" srcset=\"https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude1-1024x666.png 1024w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude1-231x150.png 231w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude1-768x499.png 768w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude1.png 1983w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/p>\n<h2>\u88ab\u96f2\u7387\u304c\u4f4e\u3044\u9806\u306b\u4e26\u3079\u308b<\/h2>\n<p>\u30a4\u30e1\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u4e2d\u304b\u3089\u3001\u3067\u304d\u308b\u3060\u3051\u88ab\u96f2\u7387\u304c\u4f4e\u3044\u30a4\u30e1\u30fc\u30b8\u3092\u629c\u304d\u51fa\u3059\u305f\u3081\u306b\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u300cCLOUD_COVER\u300d\u306e\u5024\u3092\u4f7f\u3063\u3066\u30bd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">var ImageCollection = ee.ImageCollection('LANDSAT\/LC08\/C01\/T1_TOA')\n    .filterDate('2016-01-01', '2016-12-31')\n    .filterBounds(geometry)\n    .sort(\"CLOUD_COVER\", true) \/\/properties\u306eCLOUD_COVER\u5024\u3067\u30bd\u30fc\u30c8\u3059\u308b\uff08true:\u6607\u9806\u3001false:\u964d\u9806\uff09\n\nvar image = ImageCollection.first()\n   \nMap.addLayer(image, {bands: ['B4', 'B3', 'B2'], max: 0.3});<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudsort-1024x664.png\" alt=\"\" width=\"680\" height=\"441\" class=\"alignnone size-large wp-image-6268 border\" srcset=\"https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudsort-1024x664.png 1024w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudsort-231x150.png 231w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudsort-768x498.png 768w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudsort.png 1987w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/p>\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u65b9\u6cd5\u306f\uff11\u679a\u306e\u885b\u661f\u753b\u50cf\u3092\u9078\u3073\u51fa\u3059\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3001\u8907\u6570\u306e\u885b\u661f\u753b\u50cf\u3092\u5408\u6210\u3057\u305f\u753b\u50cf\u306a\u3069\u306b\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002<\/p>\n<h2>\u5408\u6210\u3057\u305f\u885b\u661f\u753b\u50cf\u3092\u5730\u56f3\u306b\u30aa\u30fc\u30d0\u30fc\u30ec\u30a4\u3059\u308b<\/h2>\n<p>\u30a4\u30e1\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4e2d\u592e\u5024\u3067\u5408\u6210\u3057\u5730\u56f3\u4e0a\u306b\u30aa\u30fc\u30d0\u30fc\u30ec\u30a4\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">\/\/ 1\u5e74\u9593\u306eLandsat 8 TOA\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\nvar composite = ee.ImageCollection('LANDSAT\/LC08\/C01\/T1_TOA')\n    .filterDate('2016-01-01', '2016-12-31')\n    .median();\n\nMap.addLayer(composite, {bands: ['B4', 'B3', 'B2'], max: 0.3});<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude-1024x667.png\" alt=\"\" width=\"680\" height=\"443\" class=\"alignnone size-large wp-image-6265 border\" srcset=\"https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude-1024x667.png 1024w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude-230x150.png 230w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude-768x501.png 768w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/manycloude.png 1987w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/p>\n<p>\u30e2\u30b6\u30a4\u30af\u3068\u3057\u3066\u5408\u6210\u3059\u308b\u305f\u3081\u306b\u306f\u591a\u304f\u306e\u885b\u661f\u753b\u50cf\u304c\u5fc5\u8981\u306b\u306a\u308b\u305f\u3081\u3001\u3069\u3046\u3057\u3066\u3082\u96f2\u304c\u542b\u307e\u308c\u305f\u753b\u50cf\u3082\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u3082\u3061\u308d\u3093\u3001\u52a0\u5de5\u524d\u306e\u30a4\u30e1\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u6bb5\u968e\u3067\u88ab\u96f2\u7387\u306e\u9ad8\u3044\u753b\u50cf\u3092\u7701\u304f\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u306e\u5834\u5408\u30e2\u30b6\u30a4\u30af\u306e\u3068\u3053\u308d\u3069\u3053\u308d\u306b\u7a7a\u304d\u304c\u767a\u751f\u3057\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001\u30e2\u30b6\u30a4\u30af\u5316\u3059\u308b\u969b\u306e\u5408\u6210\u306e\u6bb5\u968e\u3067\u96f2\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30af\u30aa\u30ea\u30c6\u30a3\u30a2\u30bb\u30b9\u30e1\u30f3\u30c8\u30d0\u30f3\u30c9\u5024\u3092\u5229\u7528\u3057\u3066\u96f2\u3092\u30de\u30b9\u30af\u3059\u308b<\/h2>\n<p>Landsat 8\u53f7\u306b\u306f\u3001\u300cQuality Assessment Band\u300d\u3068\u3044\u3046\u30e1\u30bf\u30c7\u30fc\u30bf\u30928\u30d3\u30c3\u30c8\u306e\u30d0\u30a4\u30ca\u30ea\u30b9\u30c8\u30ea\u30f3\u30b0\u3068\u3057\u3066\u8868\u73fe\u3057\u305f\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u30d0\u30a4\u30ca\u30ea\u30fc\u30c7\u30fc\u30bf\u306b\u306f\u3001\u96f2\u306e\u6709\u7121\u3092\u8868\u3059\u30d3\u30c3\u30c8\u304c\u3042\u308a\u30aa\u30f3\u30aa\u30d5(0 or 1)\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u3001\u30a4\u30e1\u30fc\u30b8\u306a\u3044\u306e\u96f2\u306e\u9818\u57df\u3092\u5224\u5225\u3057\u30de\u30b9\u30af\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u96f2\u306b\u3088\u3063\u3066\u96a0\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u9818\u57df\u306b\u3001\u4ed6\u306e(\u96f2\u304c\u304b\u304b\u3063\u3066\u3044\u306a\u3044)\u885b\u661f\u5199\u771f\u306e\u30c7\u30fc\u30bf\u3092\u5408\u6210(\u30de\u30b9\u30af\u51e6\u7406)\u3059\u308b\u3053\u3068\u3067\u3001\u885b\u661f\u753b\u50cf\u304b\u3089\u96f2\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u53c2\u8003\uff1a<\/strong><\/p>\n<blockquote><p>\u30de\u30b9\u30af\u51e6\u7406\u306f\u3001\u7279\u5b9a\u306e\u90e8\u5206\u306e\u307f\u3092\u8868\u793a\uff08\u62bd\u51fa\uff09\u3057\u3001\u305d\u308c\u4ee5\u5916\u306e\u90e8\u5206\u3092\u8868\u793a\u3057\u306a\u3044\uff08\u9ed2\u8272\u753b\u50cf\u307e\u305f\u306f\u767d\u8272\u753b\u50cf\uff09\u3088\u3046\u306b\u3059\u308b\u753b\u50cf\u51e6\u7406\u306e\u3053\u3068\u3092\u3044\u3044\u307e\u3059\u3002<\/p>\n<div style=\"text-align:right\"><a href=\"http:\/\/rs.aoyaman.com\/img_pro\/b5.html\">\u30ea\u30e2\u30fc\u30c8\u30bb\u30f3\u30b7\u30f3\u30b0\u753b\u50cf\u51e6\u7406\uff1e\u30de\u30b9\u30af<\/a><\/div>\n<\/blockquote>\n<pre class=\"lang:js decode:true \">\/\/ \u30af\u30aa\u30ea\u30c6\u30a3\u30a2\u30bb\u30b9\u30e1\u30f3\u30c8\u30d0\u30f3\u30c9\u3092\u5229\u7528\u3057\u3066\u96f2\u3092\u30de\u30b9\u30af\u3059\u308b\nvar mask = function(image) {\n  var qa = image.select('BQA');\n  \/\/\/ \u30af\u30e9\u30a6\u30c9\u30d3\u30c3\u30c8\u304c\u30aa\u30d5\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\n  \/\/ \u53c2\u8003 https:\/\/landsat.usgs.gov\/collectionqualityband\n  var mask = qa.bitwiseAnd(1 &lt;&lt; 4).eq(0);\n  return image.updateMask(mask);\n}\n\n\/\/ 1\u5e74\u9593\u306eLandsat 8 TOA\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\nvar composite = ee.ImageCollection('LANDSAT\/LC08\/C01\/T1_TOA')\n    .filterDate('2016-01-01', '2016-12-31')\n   .map(mask)\n    .median();\n\nMap.addLayer(composite, {bands: ['B4', 'B3', 'B2'], max: 0.3});<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudmask-1024x698.png\" alt=\"\" width=\"680\" height=\"464\" class=\"alignnone size-large wp-image-6266 border\" srcset=\"https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudmask-1024x698.png 1024w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudmask-220x150.png 220w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudmask-768x523.png 768w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2018\/12\/cloudmask.png 1992w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/p>\n<h2>\u30a2\u30c9\u30d9\u30f3\u30c8\u30ab\u30ec\u30f3\u30c0\u30fc<\/h2>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u3001<a href=\"https:\/\/qiita.com\/advent-calendar\/2018\/googleearth?fbclid=IwAR3kO5kBRJhrwyYPkmMUBPk1IAAu-pJupq9ip_N1KZ8joHdfPDlTEPTM3tE\">Google Earth \/ Google Earth Engine Advent Calendar 2018<\/a>\u3078\u306e\u53c2\u52a0\u6295\u7a3f\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 \u885b\u661f\u5199\u771f\u306e\u4e2d\u306b\u306f\u3001\u64ae\u5f71\u7bc4\u56f2\u306e\u307b\u3068\u3093\u3069\u304c\u96f2\u306b\u8986&hellip;<\/p>\n","protected":false},"author":1,"featured_media":6288,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-6238","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-googleearthengine","has-post-thumbnail-archive"],"_links":{"self":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts\/6238","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/comments?post=6238"}],"version-history":[{"count":1,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts\/6238\/revisions"}],"predecessor-version":[{"id":7959,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts\/6238\/revisions\/7959"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/media\/6288"}],"wp:attachment":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/media?parent=6238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/categories?post=6238"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/tags?post=6238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}