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Google Earth Engine(GEE)——利用sentinel-2数据进行农作物提取分析
2022-06-28 22:15:00 【此星光明】
我们利用哨兵数据给农作物进行分类提取,主要有用到得时间节点是春夏秋冬四个季节,通过阈值法和updateMask来实现对农作物得提取。
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代码:
//加载哨兵2号数据
var s2 = ee.ImageCollection("COPERNICUS/S2_HARMONIZED"),
roi =
/* color: #d63000 */
/* displayProperties: [
{
"type": "rectangle"
}
] */
ee.Geometry.Polygon(
[[[114.27025202404155, 33.89965438737615],
[114.27025202404155, 33.27732637743472],
[115.25352839122905, 33.27732637743472],
[115.25352839122905, 33.89965438737615]]], null, false);
Map.centerObject(roi)
Map.addLayer(roi)
//进行QA60去云操作函数
function maskS2clouds(image) {
var qa = image.select('QA60')
var cloudBitMask = 1 << 10;
var cirrusBitMask = 1 << 11;
var ma边栏推荐
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