Jan,
I use:
listgeo mygeotiff.tif > mygeotiff.gtt
geotifcp -g mygeotiff.gtt nogeotags.tif mynewgeotiff.tif
FYI, I've been experimenting with GDAL's vrt format to sharpen my tiffs:
<VRTDataset rasterXSize="2890" rasterYSize="3451">
:
:
<VRTRasterBand dataType="Byte" band="1">
<Metadata />
<ColorInterp>Red</ColorInterp>
<KernelFilteredSource>
<SourceFilename relativeToVRT="1">NRT_123.tif</SourceFilename>
<SourceBand>1</SourceBand>
<SourceProperties RasterXSize="2890" RasterYSize="3451" DataType="Byte"
BlockXSize="2890" BlockYSize="1" />
<SrcRect xOff="0" yOff="0" xSize="2890" ySize="3451" />
<DstRect xOff="0" yOff="0" xSize="2890" ySize="3451" />
<Kernel>
<Size>3</Size>
<Coefs>-0.111 -0.111 -0.111 -0.111 2 -0.111 -0.111 -0.111 -0.111</Coefs>
</Kernel>
</KernelFilteredSource>
</VRTRasterBand>
:
:
</VRTDataset>
My kernel tends to brighten the image a little (note the "2" in the
kernel) as well as sharpen. To try it on your file, create a VRT file
with gdal_translate -of VRT, then use a text editor to change the
SimpleSource tags to KernelFilteredSource and add the Kernel. You can
then create a sharpened tif by using the VRT as input to gdal_translate,
os simply open the VRT in Quantum GIS to view the results.
Best Regards,
Brent Fraser
On 9/5/2011 8:46 AM, Jan Hartmann wrote:
Hi all,
Is there a quick way to add back georeferencing information to a
geotif file that has been processed by Imagemagick? I have lots of
georeferenced images that I want to sharpen up a bit, but ImageMagick
throws the georeference headers away. Is there a way to transport them
from the original file to the derived one?
Jan
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