[GIS] Assigning categories to a single band raster in Google Earth Engine

google-earth-enginereclassify

I'm trying to assign bins to a raster containing values between -1 and 1 in GEE. The bins would be 0.41<x<0.60, 0.61<x<0.80 for example. Is there a function for this?

The only function I can find is image.remap which works for individual values rather than ranges.

Best Answer

var thresholds = ee.Image([0.4, 0.6, 0.8]);
var zones = image.lt(thresholds).reduce('sum');
Map.addLayer(zones, {min: 0, max: 3}, 'zones');

Related Solutions

MODIS – How to Reclassify NDWI Using Google Earth Engine

What about values equal to 0.4?

.gt(): greater than

.gte(): greater or equal than

Then:

// Reclassify each image in NDWI collection and calculate yearly composite
var reclassified = NDWI.map(function(img){
  return img.gte(0.4) // or gt()
})

[GIS] LinearRegression with Google Earth Engine

Add a time-band to your images before doing the linear fit. See docs on regression.

// This function adds a time band to the image.
var createTimeBand = function(image) {
  // Scale milliseconds by a large constant to avoid very small slopes
  // in the linear regression output.
  return image.addBands(image.metadata('system:time_start').divide(1e18));
};

Best Answer

Related Solutions

MODIS – How to Reclassify NDWI Using Google Earth Engine

[GIS] LinearRegression with Google Earth Engine

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