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  1. #1
    walker is offline Global Mapper User
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    Default Elevations for GPS waypoints

    I have a series of 50 or so waypoints from a garmin GPS. I can bring these into Global Mapper no problem. The elevation data the handheld GPS collects is not very accurate. Can I download a digital elevation model into global mapper and then interpolate elevations for these waypoints? Which DEM should I be looking for for the greatest accuracy?

  2. #2
    global_mapper is online now Administrator
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    Default

    Yes, you can do that by selecting the points with the Digitizer Tool, then right clicking and selecting the option to apply elevations from the loaded terrain data.

    I would suggest perhaps the NED data (assuming you are in the US) available from the File->Download Online Imagery/Data menu command, or you might go to <i>The National Map</i> Seamless Server and pull down the even higher resolution (1/3 arc second or about 10 meter resolution) NED data and load that.

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Support
    support@globalmapper.com

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    walker (06-25-2009)

  4. #3
    walker is offline Global Mapper User
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    Default

    Thanks. That worked perfectly.

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