You could do the ST_Segmentize and then use my GetVector function to explode the line at those points.
http://www.spatialdbadvisor.com/postgis_tips_tricks/128/exploding-a-linestring-or-polygon-into-individual-vectors-in-postgis The only thing is that ST_Segmentize may introduce shorter vectors around the existing vertices as in the following example: select ST_Distance(ST_MakePoint((vect.*).startcoord.x,(vect.*).startcoord.y), ST_MakePoint((vect.*).endcoord.x,(vect.*).endcoord.y)) from ST_GetVector(ST_Segmentize('LINESTRING(0 0, 1 1, 2 2, 3 3)'::geometry,0.25)) as vect; st_distance double precision ---------------- 0.25 0.25 0.25 0.25 0.25 0.164213562373095 0.25 0.25 0.25 0.25 0.25 0.164213562373094 0.25 0.25 0.25 0.25 0.25 0.164213562373094 HTH regards Simon On Tue, 03 Apr 2012 03:38:02 +1000, Ed Linde <edoli...@gmail.com> wrote:
Hi All, I see that ST_Segmentize allows me to introduce points to a line string "x" meters apart. I was wondering ifthere was a way to break the line string so that I can get lines "x" meters in length returned as separate rows.. all belonging to the one segment ID? Cheers, Ed
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