Xiaodong,<br><br>Have you tried the gdal_polygonize.py script (<a href="http://www.gdal.org/gdal_polygonize.html">http://www.gdal.org/gdal_polygonize.html</a>)? Since your raster is classified, this should work nicely.<br>
<br><div class="gmail_quote">On Fri, Feb 26, 2010 at 3:38 AM, Xiaodong Zhang <span dir="ltr"><<a href="mailto:xiaodong.zhang2@und.edu">xiaodong.zhang2@und.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
<br>
Currently, I'm using gdal and ogr to convert a map after classification into a point shape file. Since the classification map typically consists of zones, a polygon shape file would make more sense. I'm wondering if anyone would know or share the idea of how to convert a map into a polygon shape file directly.<br>
<br>
Thanks<br>
Xiaodong<br>
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