Within my NDVI function, I want to either reclassify negative values (-1 to 0) as 0, or change them into 'no data'. Specifically, I want to the do this calculation/reclassification in the code provided in response to this question: Google Earth Engine – Get Image with highest max Scene NDVI from a time period.
I suspect I need to alter the NDVI function, but so far any changes have given me error messages or inhibit the previous functions.
function toNdvi(image) {
return image
.normalizedDifference(['B8', 'B4'])
.rename('ndvi')
.updateMask(
image.select('QA60').not()
)}
Code in question found here: https://code.earthengine.google.com/013a113d3f01c192ff7370d236197a8a
Best Answer
You can mask the unwanted values directly in the same function using
updateMask
.}