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    <p>If you cannot change dbs to one that has spatial operators implemented correctly like PostgreSQL's PostGIS extension <code>http://postgis.refractions.net/</code> , you can solve this problem using a two-part approach.</p> <p>First let MySQL give you an bounding box pre-filtering result based on the bounding box (that is what it does by default) using their intersects operator (<code>http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html#function_intersects</code>). If queries are slow, make sure that you have an index on your geometry field first.</p> <p>Then hydrate the original geometry that you used in your query into a geometry object of GIS geometry library like GEOS (<code>http://trac.osgeo.org/geos/</code>) (C++ based, although it also has bindings for different languages like Python), Shapely (<code>http://trac.gispython.org/lab/wiki/Shapely)</code>, <a href="http://www.gdal.org/ogr/" rel="noreferrer">OGR</a> ( or the Java Topology Suite (JTS) <code>http://www.vividsolutions.com/jts/jtshome.htm</code>). </p> <p>Test each of the geometries that you get back from your query result using the appropriate operator like <strong>within</strong> or <strong>intersects</strong>. Any of these libraries will give you a boolean result.</p> <p>Personally, I would look at the samples for OGR since it has a big community that is ready to help.</p> <p>Oh yeah, and sorry for putting the links like that... I guess since I am "new" I can only post one link (?)</p>
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