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Results tagged with union
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user 7360
In set theory, the union (denoted by ∪) of a collection of sets is the set of all distinct elements in the collection. It is one of the fundamental operations through which sets can be combined and related to each other.
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PostGIS Dissolve/Union close polygons
It probably needs to be based on a tolerance or buffer.
1) Using Union and SnapToGrid as explained by Paul Ramsey in another question
(Joining lots of small polygons to form larger polygon using PostGIS … CREATE TABLE merged AS
SELECT ST_Union(ST_SnapToGrid(the_geom,0.0001))
FROM parishes
GROUP BY county_name;
This did a great job of doing a union on the parts of each polygon, however, I was left …
- 3,330