Problems with .ecw World Image file

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John Woodall posted 12-12-2025 05:19

I have received an image from the mapper on a roadway project that gives me the following error on import. I am in South Carolina which uses International Feet and all my settings are set to Ift. The image also does not match the linework provided by approximately 3.90' which is about what you would get conversion between the Ift and USft.

does anyone have an idea about a setting i may have missed. I am not drawing from the image just using it a reference but the warning and offset is driving me nuts.

ian bissonnette posted 12-13-2025 09:26

try importing to a blank project that is set to international feet. see if that clears the warning. if this is the problem then convert or get an image with the right settings.

or scale it, or align to known points is likely the fastest.

Zach Edwards posted 12-13-2025 10:31

I would guess that it's not the differences between ift or sft, but rather a datum shift. Whether using Civil 3D or Microstation, be sure to use the NSRS11 (Nad83 2011) datum and realization. I see so many folks still use the legacy Nad83(86) in Civil3D. Also, Ian's suggestion of aligning/georeferencing the image in TBC would be a quick fix as well.