For reference only — not a substitute for professional engineering judgement. See Terms.
Track Alignment
Stage 1: add/edit IP points. Stage 2: set curve radius and optional transitions at each interior IP.
Click map to add IP points.
Import Polyline
Paste a GeoJSON LineString, FeatureCollection, or coordinate list (one lat, lng pair per line). The tool reconstructs IP points and approximate curve radii from the polyline geometry. Transitions default to none — add them manually after import.
m
Bearing changes at radii above this are treated as tangents. Reduce for tighter curves.
m
Douglas-Peucker tolerance. Set 2–5 m for noisy GPS traces; leave 0 for clean design data.