Overlay Fader
0%
100%
Difference in OSM
road lengths (m)
w.r.t. Meridian 2
< -3000
-3000 to -2000
-2000 to -1000
-1000 to 0
0
0 to 1000
1000 to 2000
2000 to 3000
> 3000
Base Layer
OpenStreetMap Current
OS Street View Nov 2010
Blank Background
Names Overlay
Overlays
March 2008 (England)
March 2009 (England)
October 2009 (England)
March 2010 (England)
September 2010 (Britain)
March 2011 (Britain)
A Historical Comparison of OpenStreetMap's Completeness in Britain
comparing road lengths with respect to Ordnance Survey's Meridian 2 Dataset (why?)
Data Analysis: Dr Muki Haklay, UCL CEGE. Website: Oliver O'Brien, UCL CASA