I need to continue working with a mosaic in ArcMap, I wanted to optimize my work so as not to download for monitoring many pictures. I am attaching my code, I tried to make a mosaic, but I can not export.

var collection = ee.ImageCollection('COPERNICUS/S2')
  .filter(ee.Filter.lt("CLOUDY_PIXEL_PERCENTAGE", 10)) 
  .filterDate('2021-08-01' ,'2021-08-30') 
  .filterBounds(polygon) ;
  print(collection) ;
   //Let's centre the map view over our ROI
Map.centerObject(polygon, 5);
var medianpixels = collection.median(); // This finds the median value of all the pixels which meet the criteria. 
var medianpixelsclipped = medianpixels.clip(polygon).divide(10000);
// Now visualise the mosaic as a natural colour image. 
Map.addLayer(medianpixelsclipped, {bands: ['B4', 'B3', 'B2'], min: 0, max: 1, gamma: 1.5}, 'Sentinel_2 mosaic',false)

2 Answers 2


add maxPixels: 1e13
To the export function as given below:

Export.image.toDrive({ image:medianpixelsclipped.select(['B4','B3','B2']), description: 'myMosaic', scale: 10, region: polygon, maxPixels: 1e13, crs: 'EPSG:4326' // or the one you prefer });

  • 2
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    – Community Bot
    Apr 27, 2022 at 14:38
  • thanx!!!!!!!))))))))
    – Ayazhan
    Apr 28, 2022 at 5:15

You can export your RGB mosaic to Google Drive by using the following code:

  image: medianpixelsclipped.select(['B4','B3','B2']),
  description: 'myMosaic',
  scale: 10,
  region: polygon,
  maxPixels: 1e13,
  crs: 'EPSG:4326' // or the one you prefer
  • it shows error - Error: Export too large: specified 8291273144 pixels (max: 100000000). Specify higher maxPixels value if you intend to export a large area. (Error code: 3)
    – Ayazhan
    Apr 27, 2022 at 11:41
  • Have a look at this gis.stackexchange.com/questions/267523/…
    – HMSP
    Apr 27, 2022 at 11:51

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