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What processing is done on DN when loading a IMD file?

Question asked by on Oct 25, 2017

Hi, the metadata IMD file contain info about the location date, and satellite sensor calibration factors for WorldView imagery. I'm also loading Landsat8 the same way using a metadata txt file. I am wondering if arcgis is preprocessing the tiles to get a top of the atmosphere reflectance image from the DN when adding the IMD/txt file as a raster. It does something as all the tiles are displayed nicely without any change/step tile to tile. Thanks!