Hi, Stephan Knauss wrote: > I'm trying to create lists of features inside a specific country. > What would be the most convenient way to do this?
There is no convenient way I know of ;-) > As source I could either use a planet file and use a SAX parser or > PostgreSQL with the osm2pgsql mapnik schema. I suggest using osmosis with the --bp option. > As a boundary polygon I would prefer the borders already in the database > as these are more accurate compared to the polygon files of cloudmade. In 95% of cases you will find that the borders in the database are unsuitable because they do not form a proper closed polygon. Plus, PostGIS definitely sucks at point-in-polygon performance, especially if your polygon has 30k points. I suggest that you use Gary68's polygon tool (perl script in SVN) to derive .poly files from a suitable OSM exctract (or use .poly files that are already in SVN). Then simplify these files with the simplify-poly script also in SVN unless you really, really want super-exact and super-slow cutting. Then use Osmosis to cut out an area. Pay attention to the various options (idTrackerType, clipIncompleteEntities, completeWays, completeRelations - the latter two being perfect ways to keep your server busy for a few days if you work with the full planet file). Bye Frederik _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
