Thursday, 22 November 2018

remote sensing - NDVI image value changes from -1 to 1 in ENVI to 0-255 in ArcGIS Desktop and ERDAS Imagine?


When i open NDVI image in ENVI, its value is still within the range (-1 to 1).


But when I open this NDVI image in ERDAS and ArcGIS Desktop, its value is 0-255.


What does it mean?


Is the NDVI image some problem?




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