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After importing a USGS SDTS DEM, the resulting .img file displays very dark. How to fix?

by Technical Evangelist on ‎03-30-2016 01:43 PM (375 Views)

Symptoms

After importing a USGS SDTS DEM, the resulting .img file displays very dark. How to fix?

Diagnosis

This happens  very often due to a null data value of -32767 within the image. This value dramatically skews the histogram causing your image to appear either very dark or very light.

 

Solution

The simplest solution is to recode this value to zero. This can also be done in  Spatial Modeler by creating a simple model  to automate this process.

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