I'm doing some tests on fTools/Processing spatial operators, with a cover
multilinestring layer and a base polygon layer.
Running the following query on PostGIS I get similar timings with
st_intersection and st_difference:
select l.osm_id,ST_intersection(l.geom,e.geom) as geom from
To be correct, the two postgis queries are:
select min(l.osm_id),st_difference(l.geom,st_union(e.geom)) as geom from
linee_selezione_s l join edifici_buffer_s e
on ST_Intersects(l.geom, e.geom) group by l.geom
select min(l.osm_id),st_intersection(l.geom,st_union(e.geom)) as geom from
Just two graphics two show a brutal benchmark (measuring time in every
cycle step).
Clip: http://cdn.img42.com/31e0205c1273a1d1c705e5109da48db1.png
Difference: http://cdn.img42.com/eeba68e62ea7d4db50662c2745a6d912.png
2014-07-01 20:05 GMT+02:00 G. Allegri gioha...@gmail.com:
To be correct,
