GEE25：获取年均LAI（叶面积指数）和FPAR（光合有效辐射分量）

本文链接：https://blog.youkuaiyun.com/amyniez/article/details/138836385

MODIS/061/MOD15A2H 组合了叶面积指数 (LAI) 和光合有效辐射分数 (FPAR) 产品是分辨率为 500m 的 8 天复合数据集。该算法从Terra传感器8天内的所有采集数据中选择了“最佳”像元。

var table = ee.FeatureCollection("users/yipeizhao736/HefeiProvince");
var collection = ee.ImageCollection('MODIS/061/MOD15A2H')
                  .filterDate('2023-01-01', '2023-12-30')
                  .filterBounds(table);
// LAI配色 
var colorLai = {
  min: 0,
  max: 100,
  palette: [
    'ffffff', 'fde0d4', 'fcc4ac', 'faa784', 'f68c5a', 'f27232', 'ea5811',
    'd43d04', 'b22e03', '8b1f02', '611002', '3b0801', '210401', '140301',
    '0b0101', '060101', '020101'
],
};
// FPAR配色 
var colorFpar = {
  min: 0,
  max: 100,
  palette: [
    'ffffff', 'ce7e45', 'df923d', 'f1b555', 'fcd163', '99b718', '74a901',
    '66a000', '529400', '3e8601', '207401', '056201', '004c00', '023b01',
    '012e01', '011d01', '011301'
  ],
};

Map.centerObject(table,7) 
var LAI = collection.select('Lai_500m').mean().clip(table)
var FPAR = collection.select('Fpar_500m').mean().clip(table)
Map.addLayer(LAI, colorLai, 'Lai');
Map.addLayer(FPAR, colorFpar, 'Fpar');
// 导出数据 
Export.image.toDrive({
        image: LAI,
        fileFormat: "GeoTIFF",
        scale: 500,
        maxPixels : 1e13,
        crs: "EPSG:4326",
        region:table,
        description:'LAI2008'
});
Export.image.toDrive({
        image: FPAR,
        fileFormat: "GeoTIFF",
        scale: 500,
        maxPixels : 1e13,
        region:table,
        description:'Fpar2008',
        crs:"EPS6:4326" //WGS84
});