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Elevation Data

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Contact

tom@segelflug.io

Terrain-aware glide range visualization

Mapglide

Place your glider on the map and see where you can reach — accounting for terrain, glide ratio, and safety altitude.

Flight Planning
Click anywhere to drop your glider, then click inside the ring to chain glide legs across terrain. Supports glider presets or a custom glide ratio, adjustable safety altitude, flat and terrain modes, and undo/redo.
Open planner ↗
IGC Replay
Load an IGC flight log and watch your glide ring evolve throughout the flight. Auto-detects the glider from the IGC header. Scrub to any moment, toggle follow-flight or track overlay, replay at 1×, 10×, 30×, or 120× speed.
Open replay ↗

How it works

Not a circle —
a reachable area.

01 — TERRAIN

Real terrain elevation

Samples DEM elevation data at every point along every potential route. Mountains, ridges, and valleys all factor into the result.

02 — ROUTING

Dijkstra path-finding

A grid-based Dijkstra algorithm propagates reachable altitude in all directions, routing around terrain obstacles.

03 — GLIDER

Glider-specific presets

Choose from a library of real gliders — Discus, ASW-27, DG-808, Duo Discus, and more — or enter any glide ratio. IGC replay auto-detects the glider from the log header.