osm_map_processing/custom_polys_and_extracts.md

# Creating custom polys (some rough notes)

Head to https://www.openstreetmap.org/ and find the relation id of the boundry you want as a poly

Grab an appropriate pbf/osm.bz2 from http://download.geofabrik.de/ that INCLUDES the region you want to extract if not available

Head to http://polygons.openstreetmap.fr/index.py and enter relation id

Extract the region using osmosis
	https://wiki.openstreetmap.org/wiki/Osmosis/Examples
	http://blog.geofabrik.de/?p=75
	../bin/osmosis/bin/osmosis --read-pbf central-america-latest.osm.pbf \
        --tee 3 \
        --bp file=costa_rica.poly --write-pbf costa-rica-latest.osm.pbf \
        --bp file=nicaragua.poly --write-pbf nicaragua-latest.osm.pbf \
        --bp file=panama.poly --write-pbf panama-latest.osm.pbf

../bin/osmosis/bin/osmosis --read-pbf australia-latest.osm.pbf \
    --tee 3 \
    --bp file=new-south-wales.poly --write-pbf new-south-wales.osm.pbf \
    --bp file=queensland.poly --write-pbf queensland-latest.osm.pbf \
    --bp file=victoria.poly --write-pbf victoria-latest.osm.pbf

../bin/osmosis/bin/osmosis --read-pbf us-midwest-latest.osm.pbf \
    --tee 15 \
    --bp file=marquette-county.poly --write-pbf marquette-county-latest.osm.pbf \
    --bp file=keweenaw-county.poly --write-pbf keweenaw-county-latest.osm.pbf \
    --bp file=houghton-county.poly --write-pbf houghton-county-latest.osm.pbf \
    --bp file=ontonagon-county.poly --write-pbf ontonagon-county-latest.osm.pbf \
    --bp file=gogebic-county.poly --write-pbf gogebic-county-latest.osm.pbf \
    --bp file=baraga-county.poly --write-pbf baraga-county-latest.osm.pbf \
    --bp file=iron-county.poly --write-pbf iron-county-latest.osm.pbf \
    --bp file=dickinson-county.poly --write-pbf dickinson-county-latest.osm.pbf \
    --bp file=alger-county.poly --write-pbf alger-county-latest.osm.pbf \
    --bp file=delta-county.poly --write-pbf delta-county-latest.osm.pbf \
    --bp file=luce-county.poly --write-pbf luce-county-latest.osm.pbf \
    --bp file=chippewa-county.poly --write-pbf chippewa-county-latest.osm.pbf \
    --bp file=menominee-county.poly --write-pbf menominee-county-latest.osm.pbf \
    --bp file=schoolcraft-county.poly --write-pbf schoolcraft-county-latest.osm.pbf \
    --bp file=mackinac-county.poly --write-pbf mackinac-county-latest.osm.pbf