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Elevation Data Questions about using elevation data; exporting, importing, converting, etc.

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Old 06-25-2009, 04:13 PM
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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?
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Old 06-25-2009, 06:02 PM
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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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Old 06-25-2009, 07:57 PM
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Thanks. That worked perfectly.
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