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NDVI in Raster Calculator
Added by Daniel Flaim about 11 years ago
Hi
Tried to post this a while ago but can't find my question anywhere and have no replies so here goes again.
When attempting to produce a simple NDVI raster from landsat data in Rastar Calculator my results always come back as pretty much single tone map - ie containing no information.
The formula I'm entering is Float(B4 - B3)/ Float (B4 + B3)
where B3 and B4 are pre-loaded Raster Maps.
This formula works fine in Grass GIS.
I've tried without the Float command, with and without spaces, with quotation marks around each map. What am I doing wrong?
Cheers
Daniel
I think you're posting to the wrong forum, this one is for Redmine development and general support.
OK I'll try elsewhere,
Thanks
RE: NDVI in Raster Calculator
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Added by Jean-Baptiste Barth about 11 years ago