See everywhere you can reach.
Generate drive-time and distance polygons — the geometry behind delivery zones, service coverage, and expansion planning.
What it does
The Isochrones API answers “what can I reach from here in N minutes?” with real road-network polygons, not circles. Stack multiple contours (10/20/30 min) in a single call, for any vehicle profile and any time of day.
Zones built from isochrones can be saved as named, versioned assets and referenced from other Symt APIs — assign orders by zone, price by zone, report by zone.
curl "https://api.symt.ai/v1/isochrone?origin=24.7136,46.6753&contours=10,20,30&profile=car&format=geojson" \
-H "Authorization: Bearer $SYMT_API_KEY"Run it right here.
Press “Run request” to see a live-shaped response.
Engineered for the hot path.
True network polygons
Computed on the road graph — a 15-minute zone follows highways and dead-ends, not a radius.
Stacked contours
Multiple time or distance bands in one call, returned as clean nested GeoJSON.
Zone management
Persist polygons as named zones with versions; query point-in-zone at high QPS.
Reverse isochrones
“Who can reach this dark store in 12 minutes?” — inbound reachability for site selection.
Traffic-time aware
Compute the 8 pm zone, not just the free-flow zone, using your probe data.
Rendering-ready
GeoJSON output drops straight onto Symt Vector Maps with one layer definition.
Most cloud map platforms have no isochrone API — teams approximate each polygon with hundreds of matrix calls.
Symt returns the polygon directly: one call instead of an expensive matrix workaround, and it is exact.
Ship Isochrones & Zones this week.
Free plan, real endpoints, no credit card. Bring the workload you already have — the migration is designed to be boring.