CAD Forum - tips, tricks, discussion and utilities for AutoCAD, Inventor, Revit and other Autodesk products []
Cesky English Deutsch
 Visitors: 3466 

CAD tip CAD tip # 3515:

Question CAD 
 %  platform  category 
Q - question

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

A - answer 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.
100% *  CAD 
5.1.2004    89991×  
applies to: AutoCAD Map 3D · Raster Design ·

See also:
Tip 9564:What are the .TFWX world files?
Tip 9255:Align image, change width/height independently.
Tip 9139:How to place GeoTIFF images automatically to right positions?
Tip 7087:How to reconstruct a world file from a raster image?
Tip 6802:Draping an aerial image on a Civil 3D terrain surface.

Back   All CAD Tips All CAD tips&tricks

Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above). You may also add a link to your web - like this "fan" link: CAD Forum - tips, utilities, blocks for Autodesk products
CAD:    OS:    Categ: 
Text:  FAQ glossary   

Save your floating licenses (NLS) consumed by inactive users - free unused licenses with
LogOff 2006 More info

Please use these tips at your own risk.
CAD Studio is not responsible for possible problems that may occur as a result of using any of these tips.