I'm having some trouble on how to delineate the glacier area automatically using TM4/TM5 band rations.
Guess I need to use raster calculator. But I can't seem to get the coding right.
I want to insert a threshold aswell.
Any suggestions?
Best regards, Marius
what's the coding?
The Map Algebra expression I want to run in raster calculator
Composite band image (band543)
Band ratio: TM4/TM5
Threshold: >3
screen grab the raster calculator...are the bands not showing up or something?
as per my last post...it would be useful to see if the bands are showing up in the raster calculator and if so, you should be able to select them and the / to do the math