Thread: TOPO Austria v4 PRO

Originally Posted by pietu

or new devices software use additional protection or both (new maps and new devices) ?????

Previously TOPO maps did not contain Map Signatures unlike the CN maps.
Map signatures are a digital signature that is written to the map files that Garmin produces. These digital signatures can then be used to verify that the map data has not been altered since the signature was written. On devices that support reading map signatures, any map that has been altered and does not pass the signature test will not be opened.