Isochrone API

Introduction

An isochrone is a line that connects points of equal travel time or distance around a given location. The NextBillion.ai Isochrone API computes areas that are reachable within a specified amount of time from a location, and returns the reachable regions as contours of polygons or lines that you can display on a map. This API also supports contours based on distance.

With the Isochrone API, you can:

  1. Calculate isochrones up to 40 minutes or 60km with our 4w driving mode.
  2. Define serviceable or delivery zones based on travel times from a starting location.

Parameters

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Response Schema

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Query Limits

Nextbillion.ai allows a maximum rate limit of 6000 queries per minute or 100 queries/second for continuous requests.

Note: We can increase the quota if needed on request. Contact [email protected] for more details.

Examples

Sample API Request

https://api.nextbillion.io/isochrone/json?mode=4w&coordinates=1.29363713,103.8383112&denoise=1&generalize=250&contours_colors=ff4d4f&contours_meters=5000&key=<Your_API_Key>

Sample API Response

1{
2  "features": [
3    {
4      "properties": {
5        "fill": "#ff4d4f",
6        "fillOpacity": 0.33,
7        "fillColor": "#ff4d4f",
8        "color": "#ff4d4f",
9        "contour": 5,
10        "opacity": 0.33,
11        "metric": "distance"
12      },
13      "geometry": {
14        "coordinates": [
15          [103.850311, 1.325869],
16          [103.839311, 1.320282],
17          [103.83517, 1.323778],
18          [103.835311, 1.318229],
19          [103.826534, 1.32086],
20          [103.826311, 1.323716],
21          [103.822284, 1.321664],
22          [103.823769, 1.317179],
23          [103.814311, 1.313211],
24          [103.815413, 1.306637],
25          [103.810311, 1.30875],
26          [103.807269, 1.304679],
27          [103.811639, 1.298309],
28          [103.802102, 1.298637],
29          [103.804577, 1.293903],
30          [103.801, 1.291637],
31          [103.802311, 1.284798],
32          [103.80687, 1.286196],
33          [103.811285, 1.280637],
34          [103.816634, 1.27996],
35          [103.811779, 1.275637],
36          [103.814311, 1.273519],
37          [103.817711, 1.277037],
38          [103.824311, 1.265183],
39          [103.835311, 1.272225],
40          [103.863311, 1.27038],
41          [103.871311, 1.278514],
42          [103.869311, 1.282673],
43          [103.859928, 1.278637],
44          [103.866622, 1.294637],
45          [103.862766, 1.297637],
46          [103.870779, 1.305637],
47          [103.869261, 1.305688],
48          [103.867311, 1.303957],
49          [103.866509, 1.304637],
50          [103.870223, 1.310637],
51          [103.859311, 1.31374],
52          [103.858311, 1.320365],
53          [103.854536, 1.318862],
54          [103.859227, 1.324637],
55          [103.858311, 1.325078],
56          [103.855311, 1.322137],
57          [103.850311, 1.325869]
58        ],
59        "type": "LineString"
60      },
61      "type": "Feature"
62    }
63  ],
64  "type": "FeatureCollection"
65}

Sample Image

https://api.nextbillion.io/isochrone/json?mode=4w&coordinates=1.29363713,103.8383112&denoise=1&generalize=250&contours_colors=ff4d4f&contours_meters=5000&key=<Your_API_Key>
https://nbval-demo.nextbillion.io/isochrone/json?mode=4w&coordinates=1.29578235,103.81968594&denoise=1&generalize=250&contours_colors=ad6800&contours_minutes=30&key=YOUR_API_KEY

API Error Codes

Response CodeDescriptionAdditional Notes
200Normal success case.Normal success case.
400Input validation failed.Such as missing parameter or parameter with invalid value type (for example value cannot be parsed into number).
401APIKEY not supplied or invalid.-
403APIKEY is valid but does not have access to requested resources.You might be querying for a geographical region which is not valid for your account, or requesting a service which is not enabled for you.
404Requested host/path not found.This error occurs when there is a malformed host name used.
422Could not process the request.There is an underlying map issue which prevents the processing of the request.
429Too many requests.QPM reached or something like distance matrix size quota reached.
500Internal Service error.There was an internal issue with Nextbillion.ai services. You can reach out to [email protected] for an explanation.
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