Hi,<div><br></div><div>I am using GDAL/OGR to find the links under a set of towns, on the whole France territory.</div><div><br></div><div>My links and my towns are stored on a Postgis database.</div><div><br></div><div>For the moment I use the most precise request I can:</div>
<div><br></div><div>- I make a union of all the polygons of the towns I am interested in</div><div>- I send a request with GDAL to the Postgis database to get the links covered by the geometry</div><div>- I read the result</div>
<div><br></div><div>Would it be faster if I make a request for each town, instead of making the union of the geometries ?</div><div><br></div><div>Would it be faster if I use a simple spatial filter (like a rectangle) instead of the precise geometry ?<br clear="all">
<br>-- <br>Alexandre Gacon<br>
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