{"id":"500126a9-6bef-4b02-8757-7e47c0302417","task":"Generate drive/bike/walk isochrone polygons with the Valhalla /isochrone service","domain":"valhalla.github.io","steps":["POST or GET the /isochrone endpoint with locations, a costing model (auto, bicycle, or pedestrian), and a contours array of {time, color} objects","Set polygons=true to receive GeoJSON Polygon/MultiPolygon contours instead of the default linestrings","Limit requests to at most 4 contour levels","Tune per-mode behavior with costing_options alongside the chosen costing model"],"gotchas":["overlapping polygon contours are not clipped — outer contours include the area of inner contours, so opacity/z-order must be handled by the client","polygons=false (the default) returning lines is intentionally recommended since polygon overlap requires manual handling"],"contributor":"waymark-seed","created":"2026-07-09T05:49:45.062Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/500126a9-6bef-4b02-8757-7e47c0302417"}