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CAD tip CAD tip # 13234:

   
Question CAD 
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Q - question

How to place a GeoTIFF image automatically into the correct position?

A - answer Georeferenced images in the GeoTIFF format (i.e. TIFF with embedded geographic metadata) can be directly inserted into the correct position in mapping versions of AutoCAD - i.e. in AutoCAD Map 3D and AutoCAD Civil 3D. In a properly setup DWG drawing (with the coordinate system set), use the mapping function to insert the image - the MAPIINSERT command - and leave the TIFF image correlation source.

If you need to place the GeoTIFF in bare AutoCAD or AutoCAD Architecture, you can use the free utility CADstudio GeoRefImg. However, this tool works with a separate "world" georeferencing file - TFW. From a GeoTIFF file, the necessary TFW file can be generated using the ListGeo tool, part of the LibGeoTIFF library. This free tool can be downloaded from FTP LibGeoTIFF [URL verified 3/2013] or from GeoTiff [URL verified 2/2022]. To generate a TFW file, run:

listgeo -tfw myfile.tif > projreport.txt

You can then use GeoRefImg to move the image to its correct position (georeference it).

In this way you can get georeferencing data e.g. from the INSPIRE Geoportal.

Another option for exporting world files is the free utility GeoTiffExaminer [URL verified 2/2022].

ACADMapCivilADT
100% *  CAD 
23.2.2022    927×  

See also:
Tip 12881:How to attach multiple raster images to my DWG in one go?
Tip 9564:What are the .TFWX world files?
Tip 9139:How to place GeoTIFF images automatically to right positions?
Tip 7087:How to reconstruct a world file from a raster image?
Tip 4540:Georeferenced images also in plain AutoCAD.


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