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If i clip a raster in Arcmap (10.5) and the export it so as to import it into autocad 2018(vanilla using georefimg - not map3d or civil). it gives me a error message and will not attach the image. it also will not open in adobe lightroom or infraview. If I open it in QGIS and save it from there it works... Any thoughts on why? would love to skip this step and keep all of my processing in arcmap.

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    What format are you exporting out as? – Keagan Allan Apr 11 '18 at 20:52
  • tif with world file – David Sumner Apr 12 '18 at 13:59
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I determined that to export a tiff that will be compatible with Autocad you must check "Use renderer" and "Force RGB" to produce an 8bit pixel depth raster. Otherwise the the raster will be promoted to a 16bit pixel depth which autocad will not recognize. Compression, at least LZW compression cannot used either.

  • unfortunately this produces a tiff with a white background rather than one capable of being transparent in autocad which would be nice. Any thoughts on how to get a transparent background without promoting pixel depth? – David Sumner Apr 13 '18 at 12:09

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