Stefan Keller wrote: > We're not targeting a rendering system but OSM web services which > deliver OSM data in geospatial formats (incl. point, linestring and > polygon). > > We're using heavily the hstore option and recently tried the slim mode > (with varying success) because of out-of-memory problems:
If you aim at delivering OSM data in geospatial formats (incl. point, linestring and polygon, why not to try WFS? It is pretty easy to set up a OSM WFS service by using osm2pgsql for getting data into PostGIS and then some standard WFS server for serving data out. Most obvious open source alternatives are TinyOWS, deegree, GeoServer and MapServer. TinyOWS and MapServer can also send all the tags from the hstore, but they are not queryable yet. There is an open ticket about that http://tinyows.org/trac/ticket/70 and Olivier Courtin has made some preliminary thinking about how to make hstore queryable through WFS. My demo service at http://188.64.1.61/cgi-bin/tinyows is already serving osm_point, osm_line and osm_polygon feature types from Finland. It is also serving all the free datasets from the National Land Survey of Finland, for example 800000 named places. Perhaps by the end of this week there will be a new Kosmo 2.0.1 release (http://opengis.es/) which can do pretty nice attribute and spatial queries in a very user friendly way. There was a need to make some enhancements to the current 2.0 version but they are about ready now. Spatial queries do not mean just BBOX, also these are supported: Disjoint, Equals, DWithin, Beyond, Intersects, Touches, Crosses, Within, Contains, Overlaps. In addition, these comparison operators are supported: EqualTo, NotEqualTo, LessThan, GreaterThan, LessOrEqualTo, GreaterOrEqualTo, Between, Like. I do know that OSM prefers to do things differently, but I would suggest to have at least a look at WFS even it is an OGC standard and soon used by thousands of INSPIRE download services. -Jukka Rahkonen- _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
