Global Mapper Pro

Elevations in map catalog

Ice Age Mark
Ice Age Mark Global Mapper UserTrusted User
edited January 2013 in Elevation Data

When I'm exporting GMTED2010 tiles to .gmg format to use in a map catalog, GM prompts me to save in "deci"-units to avoid terracing because the .gmg stores elevations as whole integers. But when I load these files into a map catalog and open it, GM seems to interpret those elevations as whole units, giving an incorrect display. When I export in whole meters, everything is fine. This also brings up a spin-off question. At what resolution do I need to worry about "terracing" and exporting in "deci"-units? (This stuff is only at 7.5 second resolution.) Is something wrong with the map catalog interpreting elevation units, or should I just be exporting as whole elevation units except for very flat, or very high resolution, elevation data? [V 14.1 B011813]




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