Jay,<br><br>You can do all the stuff using OGR's SQL engine. OGR also supports memory layers.<br>Refer to GDAL's RFC 28 [1], and the test scripts [2] & [3]<br><br>[1]: <a href="http://trac.osgeo.org/gdal/wiki/rfc28_sqlfunc">http://trac.osgeo.org/gdal/wiki/rfc28_sqlfunc</a><br>
[2]: <a href="http://trac.osgeo.org/gdal/browser/trunk/autotest/ogr/ogr_sql_rfc28.py">http://trac.osgeo.org/gdal/browser/trunk/autotest/ogr/ogr_sql_rfc28.py</a><br>[3]: <a href="http://trac.osgeo.org/gdal/browser/trunk/autotest/ogr/ogr_sql_test.py">http://trac.osgeo.org/gdal/browser/trunk/autotest/ogr/ogr_sql_test.py</a><br>
<br><div class="gmail_quote">On Wed, May 25, 2011 at 12:13 AM, Jay L. <span dir="ltr"><<a href="mailto:jzl5325@psu.edu">jzl5325@psu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
I have a script, written to use ESRI's ArcPy, which I am attempting to re-write using the ogr/gdal python bindings. One of the parameters that I can pass to ESRI's MakeFeatureLayer function is an SQL Query. This creates a featurelayer (in memory) which contains only those rows which meet the criteria. For this script I am iterating through each feature, placing it into it's own feature layer, intersecting with another in memory feature layer, and finally writing out the newly created geometry(s).<div>
<br></div><div>feature.GetFID() returns the unique ID as expected. Can I use OGR SQL to format this query? How about creating an in memory feature layer with only the selected feature?</div><div><br></div><div>Thanks, </div>
<div>Jay </div>
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