I’d like to get NDVI images as the result in the EO/Copernicus browser, that is intense green for vivid vegetation, through pale yellow for dry surfaces, to gray for water.
Well, I tried with both a simple NodeJS app and also by the Sentinel configurator.
Let’s start from the latter.
I copied the script as in the EO/Copernicus browser, NDVI section, as the resulting image looks fine to me. Then, I pasted the script as-is in the configurator, as custom script for the id:NDVI, finally saved the layer. Yet the preview signals an error
Something went wrong fetch the tiles
Apparently, the same error results in the NodeJS app, which leverages the sentinelhub-js package: the
getMap call raises a HTTP 400 error. Both when I use the script in the configurator and when I try to specify the same one in the
S2L2ALayer instance creation.
If I choose any other preset, both the preview and the app do work fine.
The secondary problem is that the presets given in the configurator, seem to colorize in a different way the map. E.g. the green NDVI yields kind of “negative” result than the EO/Copernicus browser’s one.