[Therion] My cave is on the middle of the sea on google maps ...

[Graham Mullan]

Hi Laurent

For one cave in the Dordogne, I used cs UTM31

The co-ordinates to fix the entrance were then read off from a UTM grid 
overlay on the digital (CD) version of the IGN map

You may find this site helps http://www.geoportail.gouv.fr/accueil, 
though I seem to only be getting lat-Long or Lambert co-ordinates at 
present, not UTM

Graham
--
graham.mullan at coly.org.uk