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POmysql polygon search fails
 

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  1. POmysql polygon search fails
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    <p>In my table I have three geospatial fields:</p> <pre><code>`lat` decimal(12,7) NOT NULL, `lon` decimal(12,7) NOT NULL, `location` point NOT NULL, </code></pre> <p>And three geospatial indices:</p> <pre><code>KEY `lat` (`lat`), KEY `lon` (`lon`), SPATIAL KEY `location` (`location`) </code></pre> <p>I then have a trigger defined as 'on before update' which sets the <code>location</code> from the lat/lon pair like this:</p> <pre><code>FOR EACH ROW SET NEW.location = PointFromText(CONCAT('POINT(',NEW.lat,' ',NEW.lon,')')) </code></pre> <p>I'm pretty certain the data is correct because I can do all sorts of circle queries. Now, I also need to do some polygon queries and just can't get it to return any results! Here's my polygon query:</p> <pre><code>SET @bbox = 'POLYGON((32.70 -117.16, 47.97 -122.19, 44.80 -68.77, 25.77 -80.19, 32.70 -117.16))'; SELECT * , AsText( location ) FROM geo_table WHERE Intersects( location, GeomFromText( @bbox ) ); </code></pre> <p>Running this query through phpMyAdmin I get the following message for both SQL statements:</p> <pre><code># MySQL returned an empty result set (i.e. zero rows). </code></pre> <p>As an FYI, the data points shown in the above SET @bbox are from 4 corners of the US (entered clockwise) and should return 99% of all points but returns nothing. Here are the coordinates: San Diego, CA: +32.70 -117.16 Seatle, WA: 47.97 -122.19 Bangor, Maine: 44.80 -68.77 Miami, FL: 25.77 -80.19 </p> <p>I have also tried this against over 3500 polygons from the NWS CAP 1.1 feed and I get nothing! I figure I must be doing something wrong but, for the life of me, I can't figure out what it is!</p> <p>Any suggestions?</p>
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