Co-linearity.
On Mon, Mar 19, 2012 at 10:44 AM, Bob Pawley <rjpaw...@shaw.ca> wrote: > Hi > > I am querying a geometry looking for intersection point between a line and > an other geometry. > > The return is 2 points and 2 linestrings. (when I use st_union a geometry > collection results) > > Can anyone tell me under what conditions that a st_intersection would return > a linestring?? > > insert into num_search (the_geom3) > select st_intersection(Num_Search.the_geom1, entities.wkb_geometry) > from entities, Num_Search > where Num_Search.seq = 'R' > and st_intersects(entities.wkb_geometry, Num_Search.the_geom1) = True > > Bob > > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users > _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
