[OSM-talk] Obtaining course of footpaths from a farmer's map

[Nick Whitelegg]

Hello everyone,

Whilst out walking/mapping on Monday, I came across this hand-painted map 
of a farmer's field:

http://www.nickw.uklinux.net/stuff/28072008028.jpg

As can be seen it shows the course of several footpaths, which unusually 
all cross the same field (which isn't that bit).
Of these only two can be ascertained ont he ground by signposting (the one 
to the north fo the field, and the one which cuts across from NE-SW). The 
others are invisible.

Can this farmer's map be used as legitimate evidence of adding the 
footpaths to OSM? Or should one take the approach that the farmer might 
have copied the courses of the footpaths from an OS map and thus no can 
do?

Thanks,
Nick