<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi, all. <div><br></div><div>I’m new to postGis/pgRouting, and am trying to find driving distances to all nodes within a certain distance of a set of starting points/nodes. </div><div><br></div><div>I have some code (thanks to <a href="http://anitagraser.com/2011/05/13/catchment-areas-with-pgrouting-driving_distance/">http://anitagraser.com/2011/05/13/catchment-areas-with-pgrouting-driving_distance/</a>) that seems to work for a single point: </div><div><br></div><div><div>SELECT seq, id1 AS node, cost</div><div> FROM pgr_drivingDistance(</div><div> 'SELECT gid as id, source, target, length::float8 AS cost FROM roads',</div><div> 7, 100000, false, false</div><div> );</div></div><div><br></div><div>However, I have a separate table containing a few hundred points (with lat, lon and geom) for which I need to identify driving distance to other points. Do I need to consider adding some additional join, or perhaps some python code to loop through the other table? </div></body></html>