[FWTools] ESRI JPG/ with JGW files conversion

Shaun Kolomeitz shaun.kolomeitz at epa.qld.gov.au
Thu Aug 17 21:26:10 EDT 2006

Dear Listers,

I have struck a problem converting a JPG file with an ESRI world file (JGW) and trying to maintain the position of the image in "real world" coordinates.
When I do a GDALINFO on the images for example -

Z:\image\9541\0.6>gdalinfo 9541-1122.jpg
Size is 1608, 3227
Coordinate System is `'
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0, 3227.0)
Upper Right ( 1608.0,    0.0)
Lower Right ( 1608.0, 3227.0)
Center      (  804.0, 1613.5)
Band 1 Block=1608x1 Type=Byte, ColorInterp=Red
Band 2 Block=1608x1 Type=Byte, ColorInterp=Green
Band 3 Block=1608x1 Type=Byte, ColorInterp=Blue

This is despite a JGW (world file) existing.
As such when I try to translate the image it loses the appropriate conversion parameters listed in the JGW file.

Any suggestions on how I could convert these files using GDAL commands ?

Thanks in advance,


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