Softwareentwicklung Heinz Lüdert
The Elevation Profile (1 km):
Use the expansible 1-km-resolution elevation profile to get a background image for your generated maps and
to compare your flight altitudes with the elevations (above mean sea level).
In the elevation views, this kind of profile will be visualized by dark brown lines.
Additional elevation profiles are offered free of charge from the
"National Geophysical Data Center, Colorado (USA)".