Docs
Request an API key

Map reachable areas

Draw the area a driver can reach from a point within a given time.

/docs/guides/isochrones.md

Before you start, you need an API key. Isochrones are expensive to compute, so ask for the fewest values you need.

Ask for one to three travel times

time_s takes 1 to 3 comma-separated values, each a multiple of 60 from 60 to 1800, strictly ascending. This asks for 10 and 20 minutes.

bash
curl -s -H "X-API-Key: $QUADRUPER_KEY" \
  'https://quadruper.com/v2/isochrone?point=122.5621,10.7202&profile=car&time_s=600,1200'

Draw the features

The response is a GeoJSON FeatureCollection, which most map libraries can display directly. It has one feature per time_s value, in ascending order. Each geometry is a Polygon or a MultiPolygon, so handle both.

javascript
for (const feature of isochrone.features) {
  console.log(feature.properties.time_s, feature.geometry.type);
}

Draw the largest area first so the smaller ones stay visible, and show the attribution text on the map.

What to expect

Times come from typical road speeds, not live traffic, so present the area as an estimate. See the GET /v2/isochrone reference for the response shape.