[postgis-users] How to check if two linestring are near to each other

[Raghavan Krishnasamylakshmanaperumal]

Hi,

I have formed a graph using my GPS traces of running/biking activities in
which I have many edges representing the same path. For example every time
I run from node-A to node-B my GPS traces are noted close to each other
like the red,green,blue lines in the attached image. Actually those 3 lines
are same(representing the same path), so I want to detect such linestrings
automatically and keep only one linestring and ignore others. Is there any
way in PostGIS which can help me to detect the nearness/closeness of the
linestrings?

-- 
Thanks and Regards,
Raghavan KL
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