[OSM-newbies] Using existing maps

[Gervase Markham]

I realise that it's not OK to copy any data from existing maps under 
copyright. However, if one is driving around with a GPS, is it OK to use 
them to make sure one has covered all the roads in an area? Or is that 
still indirectly deriving data?

In other words, I want to use my AA road atlas to make sure I hit every 
road, ticking off the roads as I go, noting down the names from the 
signs (not the atlas) and using the GPS tracks I make as the route I 
upload to OSM.

I would expect this to be a FAQ, but I can't see any info on it on the 
wiki or legal pages...

Gerv