<div>Hi Frank,</div>
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<div>I am using your latest version FWTools, and it's helping me do perfect job. Now I am trying to process my raster tif images with the utilities in the bin folder.</div>
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<div>Since the tiepoint info is written in the file header, I use the command geotifcp.exe to overwrite the tiepoint information with the option "-e", but there is one problem here, I use the listgeo command to get the tiff information, and here is the differences between the source file and the destination file:
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<div>Source file:</div>
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<div> Tagged_Information:<br> ModelTiepointTag (2,3):<br> 0 0 0<br> 379331.313 5201160.5 0<br> ModelPixelScaleTag (1,3):<br> 0.499941386 0.499941386
0<br> End_Of_Tags.</div>
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<div>Destination file:</div>
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<div> Tagged_Information:<br> ModelTiepointTag (2,3):<br> 0.5 0.5 0<br> 379255.02 5200948.64 0<br> ModelPixelScaleTag (1,3):<br> 0.5 0.5 0
<br> End_Of_Tags.</div>
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<div>The worldfile I used for the update:</div>
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<div>0.500000000000<br>0.000000000000<br>0.000000000000<br>-0.500000000000<br>379255.019591209250<br>5200948.639273808300</div>
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<div>Usually, the ModelTiepointTag info should like (in my opinions):</div>
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<div>ModelTiepointTag (2,3):<br> 0 0 0<br> 379255.02 5200948.64 0</div>
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<div>but the destination file gives another information.</div>
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<div>after the update, I can not open the updated tif image any more, therefore I am wondering if the tiepoint info causes this problem.</div>
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<div>I found the tiffset.exe information here:</div>
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<div><a href="http://www.remotesensing.org/libtiff/man/tiffset.1.html">http://www.remotesensing.org/libtiff/man/tiffset.1.html</a></div>
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<div>but there is no such a command in the FWTools. I've tried to compile the tiff library downloaded from :</div>
<div><a href="http://dl.maptools.org/dl/libtiff/">http://dl.maptools.org/dl/libtiff/</a></div>
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<div>unfortunately, I did not get it.</div>
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<div>is there any other way to modify the tif header? or to force the tif images to use a existing tfw file?</div>
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<div>thanks for any hints to solve the problem.</div>
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<div>kind regards</div>
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<div>zhonghai </div>
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