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ee.ImageCollection("LANDSAT/LT04/C01/T1_32DAY_NDSI")Sign up for Earth Engine
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Description
These Landsat 4 TM Collection 1 Tier 1 composites are made from Tier 1 orthorectified scenes, using the computed top-of-atmosphere (TOA) reflectance. See Chander et al. (2009) for details on the TOA computation.
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.These composites are created from all the scenes in each 32-day period beginning from the first day of the year and continuing to the 352nd day of the year. The last composite of the year, beginning on day 353, will overlap the first composite of the following year by 20 days. All the images from each 32-day period are included in the composite, with the most recent pixel as the composite value.
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var dataset = ee.ImageCollection('LANDSAT/LT04/C01/T1_32DAY_NDSI')
.filterDate('1989-01-01', '1992-12-31');
var colorized = dataset.select('NDSI');
var colorizedVis = {
palette: ['000088', '0000FF', '8888FF', 'FFFFFF'],
};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(colorized, colorizedVis, 'Colorized');