PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In the first stage, I armchair-map: I use the USGS orthoimagery available for my state (which is 6-inch resolution and excellently rectified and georeferenced) to trace the roads and other major features in the area.
http://www.w3.org/ns/prov#wasQuotedFrom
  • openstreetmap.org