I want to make a NDSI with a ten days period from daily MOD09GA with Google Earth Engine.

The code is a adaptation from this code from Nicholas Clinton at Maximum ndvi for 3 months average in Google Earth Engine

When I use the code (the comment in the code) for renaming images after their dates, all goes well but when i try to download it, gives me error. The error is

Error: Expected a homogeneous image collection, but an image with incompatible bands was encountered: First image type: 1 bands ([2001_01_21]). Current image type: 1 bands ([2001_01_22]). Image ID: 2001_01_22 Some bands might require explicit casts.

How can I rename those NDSI's with the date name so that I can export it right?

var pol3=ee.FeatureCollection('users/georgeboldeanu20/front_WGS');
var batch = require('users/fitoprincipe/geetools:batch')

var NDSI = ee.ImageCollection('MODIS/006/MOD09GA').map(function(image) {
  return image.select().addBands(image.normalizedDifference(['sur_refl_b04','sur_refl_b07'])).rename('NDSI').clip(pol3);
//This is the rename code 
////var NDSI_name = NDSI.map( function(img){ 
/// var id  = img.id()
 ///img = img.select('NDSI').rename(id);
///return img.copyProperties(img,['system:time_start','system:time_end']); });

var COLlection = function(collection, start, count, interval, units) {
  var sequence = ee.List.sequence(0, ee.Number(count).subtract(1));

var originalStartDate = ee.Date(start);

  return ee.ImageCollection(sequence.map(function(i) {
    var startDate = originalStartDate.advance(ee.Number(interval).multiply(i), units);

    var endDate = originalStartDate.advance(
      ee.Number(interval).multiply(ee.Number(i).add(1)), units);

    return collection.filterDate(startDate, endDate)

var days= COLlection(NDSI_name, ee.Date('2001-01-01'),10, 10, 'day');

var test = ee.Image(days.first());

batch.Download.ImageCollection.toDrive(luni, "Folder", {region:pol3.geometry().bounds(),crs:'EPSG:4326', scale:300});


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.