You may want to split not with point but with the projected point one line (use http://postgis.refractions.net/docs/ST_ClosestPoint.html) If it is not enough, you may want to translate all your geometries to reduce the number of digits in coordinates. Another possibility is to use ST_Snap to snap line to point (won't work the other way)
Cheers, Rémi-C 2013/10/28 Nicolas Ribot <[email protected]> > Hi, > > The points are not on the line, probably due to rounding errors. > > st_contains(line, point) returns false. > > Nicolas > > On 28 October 2013 18:07, franco base <[email protected]> wrote: > > Hi. > > I have a set of linestring and point on linestring. > > I want cut the linestring on the point. > > I can have n points for one linestring, > > so I use ST_Split > > (insted of ST_Line_Interpolate_Point and ST_Line_Substring) > > but it doesn't work. > > > > line;geom_line;point;geom_point > > > 7646;"0102000020BB0B000006000000A4703D0A471F37412D211F04AF335341FAEDEBE0491F3741325530C2AE335341BD5296014F1F37418FC2F578AE3353414694F606521F3741D2DEE07BAE3353412D211F74541F37418FC2F578AE33534123B9FC675020374112143FF6BC335341";11764;"0101000020BB0B00005713362F611F37410D996234AF335341" > > > 7646;"0102000020BB0B000006000000A4703D0A471F37412D211F04AF335341FAEDEBE0491F3741325530C2AE335341BD5296014F1F37418FC2F578AE3353414694F606521F3741D2DEE07BAE3353412D211F74541F37418FC2F578AE33534123B9FC675020374112143FF6BC335341";11769;"0101000020BB0B00005EF0DD584620374139BF2762BC335341" > > > 7646;"0102000020BB0B000006000000A4703D0A471F37412D211F04AF335341FAEDEBE0491F3741325530C2AE335341BD5296014F1F37418FC2F578AE3353414694F606521F3741D2DEE07BAE3353412D211F74541F37418FC2F578AE33534123B9FC675020374112143FF6BC335341";11762;"0101000020BB0B0000A5CBC785841F374156A2A33CB1335341" > > > > ST_GeometryType(St_Split(geom_line, geom_point)) > > give "ST_GeometryCollection" > > > > but > > > > (ST_Dump(ST_Split(geom_line, geom_point))).geom > > > > return only 3 linestring (one for record) and the geometry is egual to > > geom_line > > > > > > thanks. > > > > fb > > > > _______________________________________________ > > postgis-users mailing list > > [email protected] > > http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users > _______________________________________________ > postgis-users mailing list > [email protected] > http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users >
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