An overlay map of Post Boxes with Edward VIII royal cyphers

Method stolen from http://blog.technomancy.org/2009/9/12/how-to-make-a-map-based-on-openstreetmaps.html

wget -O eviiir.osm http://overpass-api.de/api/xapi_meta?*[royal_cypher%3DEVIIIR] xmlstarlet tr osm2georss.xslt eviiir.osm > eviiir.georss.xml