Terrain height at the launch point (source: Open-Meteo).
Aerodynamic quality
:1
Glide-ratio degradation 100%
Glider speed
Wind
NESW
0°
Wind speed · blows toward arrow
Terrain
Arrival height above terrain
m
Elevation detail —
Cut the reachable area where the glide slope meets the ground, instead of
assuming flat terrain at the launch elevation.
Range a glider can reach by gliding down from the given altitude at the
entered glide ratio (L/D). Without terrain it is a
true geodesic circle over ground assumed flat at the launch elevation.
Switch terrain on and the circle becomes a dashed reference, with the
shape showing where the glide slope actually still clears the ground —
cut short by ridges, carried further down valleys. Click or drag the pin to
move the launch point.