SUM=[Google Earth] * [Ordnance survey]^2
OS maps "borrowed" from Multimap, overlayed onto Google Earth = crafty trail finding tool.
All the detailed markings of "creative" b.o.a.t.s from OS explorers, onto the detail and advantage of actually being able to see the terrain from google. classy, im sure you will agree. if only they would get themselves sorted out with Wales at google! maybe ill scan in some MBR and singletrack route cards and overlay them too.