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How do I convert a .img file into a raster file that Arcmap can recognize

January 10 2012 | 1 comment
Categories: Map Data

Hello,

I am trying to convert a DEM that can be downloaded as a .img file to a raster file type that ArcGIS can recognize. The .img file I am working with is from the USGS Global Land Cover Characteristics Geodatabase (GLCC) Version 2.

Description of data:
http://edc2.usgs.gov/glcc/sadoc2_0.php

Data:
http://edc2.usgs.gov/glcc/tablambert_sa.php

Thank you for your help!

Mapping Center Answer:

We tried to download an .img file from this site, too, and also had problems.  In this case, you have to contact the data provider (UISFGS) because it appears that the files are corrupt or that there is some other problem with the source. You should be able to open and ERDAS .img file in ArcGIS without having to convert formats at all. Please contact the USGS to see if they can help you with this problem.

When .img files were just .img files posted by John Hutchinson on May 30 2012 2:11PM
This dataset was originally developed before ERDAS or ArcGIS existed. The ".img" back then was just a generic file extension. I don't have time to check on specifics, but you'll need to follow the directions in the FAQ at http://edc2.usgs.gov/glcc/technote.php, which describe how to create a header file and input the downloaded image as a BSQ with the old Arc workstation Imagegrid command. Sorry for the antiquated workflow.

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