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One of the answers to this question (Google Earth Engine - Get Image with highest max Scene NDVI from a time period) provides code which gives a Sentinel image/date with the highest NDVI for each region (https://code.earthengine.google.com/5165eca22f5dbfc8e114919d9315ab73).

This is half of what I want, but I also want the Sentinel image/date of the lowest NDVI for a region, but am not sure how. I have tried changing

return ee.Feature(meanFeatureCollection.sort('mean').first()

to descending order, but it didn't change the console output.

EDIT: I double checked and the link code doesn't actually do as described, it only prints the NDVI and ID of first Sentinel image in the collection. So I also need the correct script to identify highest AND lowest NDVI images.

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  • In the code provided as an answer to the question you referred to, code.earthengine.google.com/013a113d3f01c192ff7370d236197a8a For lowest value, just change to .aggregate_min('mean') in the var highestMean = mosaicsWithMean.aggregate_max('mean')
    – Es_a
    Commented Feb 23, 2022 at 15:04
  • thank you very much. if you want to post this as answer, i'll accept it. either way thanks Commented Feb 23, 2022 at 16:44

1 Answer 1

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In the link here, the code provided as an answer to the question you referred to.
For getting lowest value, you can change max to min

var highestMean = mosaicsWithMean.aggregate_max('mean')

to

var lowestMean = mosaicsWithMean.aggregate_min('mean')
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  • thanks so much. I also want to turn all negative ndvi values used in the calculations to 0, but I can't figure out what/how to alter this code Commented Mar 1, 2022 at 15:29

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