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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>At this point it sounds like you are getting squarely into
raster geoprocessing. Unless you need to do it standalone for some reason, you
might consider using GRASS or QGis with the GRASS extensions as GRASS is a
fantastic raster analysis package.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Craig<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> gdal-dev-bounces@lists.osgeo.org
[mailto:gdal-dev-bounces@lists.osgeo.org] <b>On Behalf Of </b>Seth G<br>
<b>Sent:</b> Tuesday, October 20, 2009 2:06 AM<br>
<b>To:</b> gdal-dev@lists.osgeo.org<br>
<b>Subject:</b> [gdal-dev] GDAL Sieve Script<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;
font-family:"-moz-fixed","serif"'>Hi, <br>
<br>
I have been looking at the <a href="http://www.gdal.org/gdal_sieve.html">http://www.gdal.org/gdal_sieve.html</a>
script, and it almost meets my requirements. <br>
However rather than replacing small pixel areas with neighbouring values, I'd
like to set all these pixels to a "no data" or 0 value. <br>
<br>
I guess I could use the script as it is, and then run a raster analysis to find
the difference between the two grids to create a mask, but just wondering if
there was another way. <br>
I need to remove areas of land that are not economically viable to plant
bioenergy crops as they are too small. <br>
<br>
Thanks for any help. <br>
<br>
Seth <o:p></o:p></span></p>
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