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Importing to PostGIS
See the separate PostGIS page for overview.
Edit PostgreSQL 8.4.x settings:
shared_buffers = 1024MB
maintenance_work_mem = 4096MB
checkpoint_segments = 20
autovacuum = off
Import with a command like:
osm2pgsql --merc --slim -C 26000 -d geo /Volumes/Data/osm/planet-110803.osm
osm2pgsql Style files - Import population of cities and other special flags.
Also ability to clip (crop, filter) just a tiny bit of OSM by geography or tag:
/usr/local/osm/osmfilter planet-latest.osm --keep-ways=building= --drop-relations -o=buildings.osm
Further reading: OSMfilter
Get planet.osm from (many confusing links):
Inspecting data attributes (tags) on OSM.org
Use the + on the right side of the OSM.org map viewer. Then check the Data box. Make sure you're zoomed in far enough. The features will highlight in the map and list in the left sidebar. Click on to get a summary. There is also a link to the full details. Note: some features are part of larger "relations", the relation carries the attributes and you'll need to link up to that to read them.
More about tags:
- TagInfo for learning all values associated with key
- Boundary example on the OSM wiki
- Tag:boundary_maritime on OSM wiki
OSM Data Dictionary:
- Geofabrik OSM - GIS Guide (pdf) - What's actual in there?
Is a bitch. Potlatch 1 is more useful for editing roads and such. Hover over the Edit tab until you see that option, click on the appropriate link.
Guide from MapBox - Getting started with JOSM editor, tracing from satellite imagery.