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<div class="moz-cite-prefix">Hi Jan,<br>
<br>
You can cut result raster with the geometry (shape file) using
gdalwarp with cutline option (<a class="moz-txt-link-freetext" href="http://gdal.org/gdalwarp.html">http://gdal.org/gdalwarp.html</a>).<br>
<br>
Best regards,<br>
Dmitry<br>
<br>
27.12.2012 16:38, Jan Hartmann пишет:<br>
</div>
<blockquote cite="mid:50DC415A.30401@uva.nl" type="cite">
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<font face="Times New Roman, Times, serif">Can anyone tell me wath
is happening here? I have a large three-band raster (3.8G)
looking like this:</font><br>
<br>
<font face="Times New Roman, Times, serif"><a
moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://mapserver.sara.nl/map2a.png">http://mapserver.sara.nl/map2a.png</a></font><br>
<br>
<font face="Times New Roman, Times, serif">I compress it (from
information from this list a few days ago) with:<br>
<br>
gdal_translate -co COMPRESS=JPEG -co PHOTOMETRIC=YCBCR big.tif
small.tif<br>
gdaladdo --config COMPRESS_OVERVIEW JPEG --config
PHOTOMETRIC_OVERVIEW YCBCR -ro -r gauss small.tif 2 4 8 16 32 64<br>
<br>
and get a file of 37M, which is nice. However, the map has all
kinds of rubbish at the borders. It looks like this:<br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://mapserver.sara.nl/map2b.png">http://mapserver.sara.nl/map2b.png</a><br>
<br>
The equivalent pictures of a small part of the map look like
this:<br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://mapserver.sara.nl/map1a.png">http://mapserver.sara.nl/map1a.png</a><br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://mapserver.sara.nl/map1b.png">http://mapserver.sara.nl/map1b.png</a>
<br>
<br>
Can anyone help me?<br>
<br>
Jan<br>
</font> <br>
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