[OSM-dev] Website to generate polygons from OSM relations
jocelyn.jaubert at gmail.com
Tue Jun 11 21:45:31 UTC 2013
I have put into production a website to generate various outputs from
OSM relations, by taking into account inclusion of other relations. It
is available at:
What it can do:
- generate whole geometry from an OSM relation ID, with handling of
sub-relations - this works especially well with the recursive French
model for administrative relations, and can be used as a sanity check.
- generate simplified geometries, even bigger or smaller - this is
useful to cut a .osm file with a good .poly file.
- export WKT, .poly, GeoJSON, or even a picture.
- import a user .poly file, and then do an Union from an OSM relation.
I used this to fix some polygons used for Geofabrik extracts.
A few examples:
OSM relation for Corsica:
Same thing for France (image is a little longer to generate)
Union of Geofabrik and OSM relation for PACA, a french region:
(you can see that some part of the region were missing from the yellow
The source code is available at:
This uses an osmosis database, containing the whole word, and some
Postgis functions. If you have any suggestion, don't hesitate to propose
More information about the dev