All manufacturers get their maps from the same source (at least in the US and CA not sure of Europe). You will not get topo, you will not get power lines etc. They will show rivers, major bodies of water and some railroad tracks. The U.S. / CA maps get down to the street level but are always a couple of years old. The CA maps are not as detailed as US.


Garmin does sell topo maps (not sure about Magellan). You might see some additional detail on these maps.