Monday, 26 March 2018

google earth engine - Filter Landsat images base on cloud cover over a region of interest



My goal is to create an image collection that has 100% free cloud over a small region of interest, for example a lake.


This script filters landsat 8 images based on location and cloud cover:


var nocloudimages =  landsat8.filterBounds(ROI)
.filter(ee.Filter.lt('CLOUD_COVER', value))
.sort('system:time_start', true)

However, as we know, the 'CLOUD_COVER' accounted for the whole landsat 8 image percentage of cloud, not a particular Region of Interest (ROI) cloud cover.


Is there a method to achieve that?




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