New answers tagged idrisi
with ArcGIS, you can use the "copy raster" tools to convert the img file in a ENVI file. Just write ".dat" at the end of the name of the output file. With ENVI you just need to convert to an ENVI file and use the file that has no extension. By the way, you don't need to write code to use gdal. You can install it with OSGEO4W, then you type gdal_translate ...
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