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<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi
All <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have done some searching to try solve my problem, but have been unsuccessful. I
am relatively new to gdal, but not new to GIS. I apologise if my question's are
basics..but an answer would help me significantly. I am running the latest
build of Gdal for windows (1.43), and using the pre-compiled binaries. So here
is my primary and secondary question: <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have a tif file which i want to clip at certain coordinates, so I call the
following command: <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>"gdal_translate
-projwin 16.25 -28.5 16.5 -28.75
H:\1_50000_April2007\2816\2816CB_2003_ED2_GEO.TIF 2816cb.tif" <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>On
running this i get the following error: <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>"Input
file size is 8267, 10629 <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
-projwin option was used, but the geotransform is <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>rotated.
This configuration is not supported." <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have checked my input images and coordinates passed through with projwin, and
all seem fine. Gdalinfo of the files reveals the following coordinate
information: <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Upper
Left ( 16.1928674, -28.4559735) ( 16d11'34.32"E,
28d27'21.50"S) <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Lower
Left ( 16.1904570, -28.8619556) ( 16d11'25.65"E,
28d51'43.04"S) <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Upper
Right ( 16.5508568, -28.4576272) ( 16d33'3.08"E, 28d27'27.46"S)
<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Lower
Right ( 16.5484465, -28.8636093) ( 16d32'54.41"E,
28d51'48.99"S) <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Center
( 16.3706569, -28.6597914) ( 16d22'14.36"E,
28d39'35.25"S) <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>So
my question is...what do I do to correct the error. I see no related messages
between gdal_translate and geotransform. Do I need to do some programming to
solve this problem? I shouldn’t think so, as what I am doing is pretty
basic.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Second/third
question is..if i do a straight translate to geotiff, my output image is 85Mb,
while my input is only 6Mb (also tif, but with LZW compression) - how do I
force LZW or export a file of the same size, or smaller, as the original?. I
tried ECW but i received a "no support" message. Is ECW supported? <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sorry
for the long winded message, but i need to resolve this to do in Gdal. If it
were just one image, I would use other GIS packages, but I have 2000 odd images
to do and need to batch them <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks
<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Andrew<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
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