Geospatial · Geocoding and routing

Isochrone

Draws the area you can reach from each point within a time or distance, such as a 15-minute drive.

Also known as: Drive-time area, reachability

How it works

Pick the Origin latitude and Origin longitude columns, a Travel mode (Car by default, or Bike, Walk or Truck), and the Budget: a number with Minutes or Metres, 15 minutes by default. Choose the Routing tiles to run on; the node works offline against the tile set installed in the app. Every input row comes back with its columns plus isochrone_geometry, the polygon of everything reachable within the budget. An origin outside the tiles gets NULL geometry.

Inputs and outputs

Settings

{
  lat: string
  lon: string
  costing: "auto"|"bicycle"|"pedestrian"|"truck"
  budget: number
  budgetType: "minutes"|"metres"
}

Example

You want a 15-minute drive catchment around each clinic. Set the origin columns to lat and lon, Travel mode to Car, Budget to 15 Minutes. A Spatial Join with population points then counts the people each clinic can reach. For several bands at once, use Trade Areas with the Drive time method.

More in Geocoding and routing

• Geocode — Finds the latitude and longitude for addresses or place names and adds a point. Works offline at city level, at street level with an address index you build, or through an online service you opt into.
• Reverse Geocode — Finds the nearest place or street address for each point and adds place, region, country, street, city and postcode columns. Works offline at city level, at street level with an address index you build, or through an online service you opt into.
• Route — Works out the road route between each row's start and end point, with distance, travel time and the route line. By car, bicycle, foot or truck.
• Matrix — Works out road distance and travel time between every pair of points, or from each start to each destination. For example, drive time from every store to every customer.
• Map-match — Snaps noisy GPS points onto the road network, one matched path per trip or each point with its confidence.
• Optimize stops — Puts stops in the visiting order with the least total travel time or distance on the road, for one or several vehicles.