Google Earth Engine ——MODIS Terra/Aqua Daily NDSI归一化差异雪指数数据集

The Normalized Difference Snow Index is used to identify snow, based on its characteristically higher reflectance in the visible portion of the spectrum compared to the mid-IR. NDSI is computed using the Green and Mid-IR bands, and has a range of -1.0 to 1.0. See Riggs et al. (1994) for details. This product is generated from the MODIS/MOD09GA surface reflectance composites.

归一化差异雪指数是用来识别雪的，基于它在光谱的可见部分比中红外更高的反射率的特点。NDSI使用绿色和中红外波段进行计算，范围为-1.0到1.0。详见Riggs等人（1994）。这个产品是由MODIS/MOD09GA表面反射率合成物生成的。

Dataset Availability

2002-07-04T00:00:00 - 2017-03-30T00:00:00

Dataset Provider

Google

Collection Snippet

ee.ImageCollection("MODIS/MYD09GA_NDSI")

使用说明：

MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

代码：

var dataset = ee.ImageCollection('MODIS/MCD43A4_006_NDSI')
                  .filter(ee.Filter.date('2018-04-01', '2018-06-01'));
var colorized = dataset.select('NDSI');
var colorizedVis = {
  palette: ['000088', '0000FF', '8888FF', 'FFFFFF'],
};
Map.setCenter(-7.03125, 31.0529339857, 2);
Map.addLayer(colorized, colorizedVis, 'Colorized');