当前位置:网站首页>Google Earth Engine(GEE)——合并VCI指数和TCI温度得时序影像折线图(危地马拉、萨尔瓦多为例)
Google Earth Engine(GEE)——合并VCI指数和TCI温度得时序影像折线图(危地马拉、萨尔瓦多为例)
2022-06-22 01:12:00 【此星光明2021年博客之星云计算Top3】
本次得实验是适用MODIS影像MODIS/006/MOD13Q1和MODIS/006/MOD11A2对影像进行分析分别选取NDVI波段和LST波段进行时间序列分析,分别先对NDVI最大最小值归一化,然后计算VCI,然后通过LST同样计算TCI,然后分别将两者展示:
代码:
//Add MODIS Vegetation Indices 16-Day Global 250m
var Coll_NDVI = ee.ImageCollection("MODIS/006/MOD13Q1")//MODIS/006/MOD13A1
var Coll_LST = ee.ImageCollection("MODIS/006/MOD11A2")//MODIS/006/MOD11A1
var startYear = 2010;
var endYear = 2022;
var startDate = ee.Date.fromYMD(startYear, 1, 1);
var endDate = ee.Date.fromYMD(endYear, 12, 31);
Coll_NDVI = Coll_NDVI.filterDate(startDate, endDate).select("NDVI");
Coll_NDVI = ee.ImageCollection(ee.Algorithms.If(Coll_NDVI.size().eq(0),
ee.ImageCollection(ee.Image(0).selfMask().rename('NDVI')),
Coll_NDVI
));
Coll_LST = Coll_LST.filterDate(startDate, endDate).select("LST_Day_1km");
Coll_LST = ee.ImageCollection边栏推荐
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