[OHM] Interesting changeset in OSM for french georeferencing

[Rob H Warren]

Take a look at change-set 4176402, http://www.openstreetmap.org/node/670188926

Someone inserted the French triangulation points into OSM;  these date back to pre-1914 and can be used to geo-reference German and French maps.

Tim, at some point we should add a 'snapping' feature to map warper so we can simply pick (man_made=survey_point) points for geo-referencing.

-rhw