I'm trying to extract all the polygons for the buildings in my country, however, it seems osm2pgsql is extracting very little information compared to what I need.
My idea was that I will rely on the empty.style file and I've set everything to have the "delete" flag, and keep only the tag=[building=yes], importing the building footprints should work. A brief extract from the style file:
# OsmType Tag Type Flags # Insert your own columns here, or change polygon,nocolumn to polygon below .... node,way amenity text delete node,way building=yes text polygon,nocolumn ....
The problem with this is I am seeing more unwanted polygons (administrative delimitation in Luxembourg) and less of the needed polygons (all the "mapped" buildings footprint polygons).
This is how my file looks like atm: http://pastebin.com/hwtYth22
This is how things look where the tag building=yes, notice the administrative areas polygons making it into the database, but also the lack of all the known polygons:
If I revert from "building=yes", and I leave it only "building", I get more polygons, but still, not all the buildings, yet more compared to using the "building=yes" tag.
Any advice on what I can do to:
- prevent the administrative boundaries from showing up in postgres
- have all the building footprints in postgres so I can filter them out by Office/amenity/etc.