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postgis problem with shortest distance calculation

while working with POSTGIS pgrouting, for calculateing the distance between two roads(lines) i got the shortest_path function. But the logic is based on Start_point(Start_id) and end_point(end_id) ...
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2answers
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Trying to create PostGIS database

I am trying to create a spatially enabled PostGIS database. I am following the PostGIS documentation, http://postgis.refractions.net/documentation/manual-1.5/ch02.html#id2648455. In the short ...