Altitude model used is not in accordance with local altitude model

Question

The altitude model used in the "topo" map is quite different from the local altitude. 
 With the topo "topo pro" map the contours lines is the same as our local altitude model (in France) 
 But if you pin a point on the map. It will give you the false altitude from the "topo" map. Even when the "topo pro" map is activated. 
 Personnaly I think that's quite a shame to pay for the "topo pro" data. While in France the local topographic authority is giving access for free

Garmin - JH · Answer

I can't speak to a specific location on a Topo Pro map for France based on so many factors and needed detail. The best suggestion for something like this is to contact the local support office there in France. 
 You can reach them at +33 1 55 69 33 99 (toll-free call) Monday to Thursday, 9:00 AM to 5:00 PM, and Friday, 9:00 AM to 4:00 PM. Closed weekends and public holidays.