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  1. #1
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    Default 3D Map Garmin Nuvi 3790

    Newbie question: When I update my 3790 map to the 2017.1 version do I update the 3D as well as the DEM map?

    Thanks

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  3. #2
    Global Moderator 3D Map Garmin Nuvi 3790
    3D Map Garmin Nuvi 37903D Map Garmin Nuvi 37903D Map Garmin Nuvi 37903D Map Garmin Nuvi 37903D Map Garmin Nuvi 37903D Map Garmin Nuvi 3790
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    Default

    DEM = Digital Elevation Model. It shows ground contours when zooming out sufficiently.
    3D = 3D buildings and landmarks. It shows when zooming in sufficiently.
    With each new map, there will be a new gmap3d.img file.
    Not with each new map, there will be a new DEM file. Ground contours don't change that often, provided no major land slides have taken place.

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