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
<<attachment: gps_traces_only.png>>
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