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v4

latestOpenAPI 3.1.0MITraw.githubusercontent.com2026-08-03123883.7 KB

/expansion

Edges visited during graph expansion (debug)

post/expansion

Request body

idstring

Arbitrary request identifier echoed in the response.

format'json' | 'gpx' | 'osrm' | 'pbf' | 'geotiff' | 'mvt'

Not all formats are supported by all endpoints, e.g. geotiff is isochrone-only.

units'km' | 'miles' | 'mi'
languagestring

BCP47 locale for narrative output. See locales/ for supported values.

costing'auto' | 'bicycle' | 'pedestrian' | 'truck' | 'bus' | 'taxi' | 'motor_scooter' | 'motorcycle' | 'multimodal' | 'bikeshare' | 'auto_pedestrian' required
action'route' | 'isochrone' | 'sources_to_targets' required

Algorithm to expand.

expansion_propertiesExpansionProperty[]
skip_oppositesboolean

Skip reverse-direction edges in the output.

dedupeboolean

Emit each edge only once.

Example request

{
  "format": "json",
  "costing": "auto",
  "costing_options": {
    "multimodal": {
      "filters": {
        "operators": {
          "action": "exclude",
          "ids": [
            "NYC_AUR"
          ]
        },
        "routes": {
          "action": "exclude",
          "ids": [
            "NYC_AUR"
          ]
        }
      }
    },
    "transit": {
      "filters": {
        "operators": {
          "action": "exclude",
          "ids": [
            "NYC_AUR"
          ]
        },
        "routes": {
          "action": "exclude",
          "ids": [
            "NYC_AUR"
          ]
        }
      }
    }
  },
  "exclude_locations": [
    {
      "type": "break",
      "preferred_side": "opposite",
      "street_side_cutoff": "primary",
      "search_filter": {
        "min_road_class": "primary",
        "max_road_class": "primary"
      }
    }
  ],
  "locations": [
    {
      "type": "break",
      "preferred_side": "opposite",
      "street_side_cutoff": "primary",
      "search_filter": {
        "min_road_class": "primary",
        "max_road_class": "primary"
      }
    }
  ],
  "expansion_properties": [
    "durations"
  ]
}

Response

Expansion GeoJSON result