## Calculate an isochrone from a point

`$client->routing->isochronePost(float lat, float lng, float time, ?string format, ?string mode, ?string outputFields, ?bool outputGeometry, ?string outputInclude, ?int outputPrecision, ?float outputSimplify): RoutingIsochronePostResponse`

**post** `/api/v1/isochrone`

Calculate an isochrone from a point

### Parameters

- `lat: float`

  Latitude

- `lng: float`

  Longitude

- `time: float`

  Travel time in seconds (1-7200)

- `format?:optional string`

  Response format: json (default), geojson, csv, ndjson

- `mode?:optional string`

  Travel mode (auto, foot, bicycle)

- `outputFields?:optional string`

  Comma-separated property fields to include

- `outputGeometry?:optional bool`

  Include geometry (default true)

- `outputInclude?:optional string`

  Extra computed fields: bbox, center

- `outputPrecision?:optional int`

  Coordinate decimal precision (1-15, default 7)

- `outputSimplify?:optional float`

  Simplify geometry tolerance in meters

### Returns

- `RoutingIsochronePostResponse`

  - `?list<GeoJsonFeature> features`

    Array of isochrone polygon Features (multi-contour only)

  - `?GeoJsonGeometry geometry`

    GeoJSON Geometry object per RFC 7946. Coordinates use [longitude, latitude] order. 3D coordinates [lng, lat, elevation] are used for elevation endpoints.

  - `?Properties properties`

    Isochrone metadata

  - `?Type type`

    `Feature` for single contour, `FeatureCollection` for multiple contours

### Example

```php
<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'My API Key', environment: 'local');

$response = $client->routing->isochronePost(
  lat: 0,
  lng: 0,
  time: 0,
  format: 'format',
  mode: 'mode',
  outputFields: 'output[fields]',
  outputGeometry: true,
  outputInclude: 'output[include]',
  outputPrecision: 0,
  outputSimplify: 0,
);

var_dump($response);
```

#### Response

```json
{
  "features": [
    {
      "geometry": {
        "coordinates": [
          2.3522,
          48.8566
        ],
        "type": "Point"
      },
      "properties": {
        "@id": "bar",
        "@type": "bar",
        "amenity": "bar",
        "cuisine": "bar",
        "name": "bar"
      },
      "type": "Feature",
      "id": "node/21154906"
    }
  ],
  "geometry": {
    "coordinates": [
      2.3522,
      48.8566
    ],
    "type": "Point"
  },
  "properties": {
    "area_m2": 0,
    "max_cost_s": 0,
    "mode": "auto",
    "time_seconds": 0,
    "vertices_reached": 0
  },
  "type": "Feature"
}
```