Elevations for GPS waypoints

[walker]

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?

[global_mapper]

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

[walker]

Thanks. That worked perfectly.