# 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