CAD tip # 3515:

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What are the .TFW, .JGW or .PGW files?

TFW, JGW, PGW, BPW, EWW, SDW, etc. are the georeference ('World') files for raster images in TIFF (.TIF), JPEG (.JPG), PNG (.PNG), BMP (.BMP), ECW (.ECW or SID (.SID) file formats.

Autodesk Map (or Raster Design or the GeoRefImg AutoCAD utility) can use these 'World' files directly to place the inserted raster images automatically.

A TFW/JGW file has the same filename as the main image file. It uses a textual (ASCII) format - e.g.:

  
1.50000000000000 (X scale, pixel size in meters)  
0.00000000000000 (affinity - Y-scale in X dir.)  
0.00000000000000 (affinity - X-scale in Y dir.)  
-1.50000000000000 (Y scale)  
1934001.50000000000000 (X coordinate of the upper left pixel)  
1187698.50000000000000 (Y coordinate of the upper left pixel)

TFW file can be created also automatically - see the IWORLDOUT command in Autodesk Raster Design product or the latest versions of GeoRefImg.

MapCO

*CAD

5.1.2004 100128×

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this tip shared by ARKANCE experts applies to: AutoCAD Map 3D · Raster Design ·

See also:
Tip 14718:	Activating contextual learning in Eagle Point Pinnacle.
Tip 14565:	MAPIINSERT in version 2026 ignores georeference from the World file.
Tip 14328:	How to verify entitlement of an application from Autodesk Apps using LISP?
Tip 14106:	Printing of the underlay map with a light background.
Tip 13512:	How to open Google Earth directly in your AutoCAD window?

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