Spatial - Post Closest Point

Reference

Service:: Maps

API Version:: 2022-08-01

Use to get the closest point between a base point and a given set of target points.

Note

Azure Maps Spatial service retirement

The Azure Maps Spatial service is now deprecated and will be retired on 9/30/25. For more information, see End of Life Announcement of Azure Maps Spatial.

The Post Closest Point API is an HTTP POST request that returns the closest point between a base point and a given set of target points. The set of target points is provided by user data in post request body. The user data may only contain a collection of Point geometry. MultiPoint or other geometries will be ignored if provided. The algorithm does not take into account routing or traffic. The maximum number of points accepted is 100,000. Information returned includes closest point latitude, longitude, and distance in meters from the closest point.

POST https://{geography}.atlas.microsoft.com/spatial/closestPoint/json?api-version=2022-08-01&lat={lat}&lon={lon}

With optional parameters:

POST https://{geography}.atlas.microsoft.com/spatial/closestPoint/json?api-version=2022-08-01&lat={lat}&lon={lon}&numberOfClosestPoints={numberOfClosestPoints}

URI Parameters

Name	In	Required	Type	Description
format	path	True	JsonFormat	Desired format of the response. Only `json` format is supported.
geography	path	True	string	Location of the Azure Maps Account. Valid values are us (East US, West Central US, West US 2) and eu (North Europe, West Europe). This parameter is required when a `udid` is supplied in the request. For example, if the Azure Maps Account is located in East US, only requests to us geography will be accepted.
api-version	query	True	string	Version number of Azure Maps API.
lat	query	True	number	The latitude of the location being passed. Example: 48.36.
lon	query	True	number	The longitude of the location being passed. Example: -124.63.
numberOfClosestPoints	query		integer	The number of closest points expected from response. Default: 1, minimum: 1 and maximum: 50

Request Header

Name	Required	Type	Description
x-ms-client-id		string	Specifies which account is intended for usage in conjunction with the Microsoft Entra ID security model. It represents a unique ID for the Azure Maps account and can be retrieved from the Azure Maps management plane Account API. To use Microsoft Entra ID security in Azure Maps see the following articles for guidance.

Request Body

Name	Required	Type	Description
features	True	GeoJsonFeature[]	Contains a list of valid `GeoJSON Feature` objects.
type	True	string: FeatureCollection	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

Responses

Name	Type	Description
200 OK	ClosestPointResponse	OK
Other Status Codes	ErrorResponse	An unexpected error occurred.

Security

AADToken

These are the Microsoft Entra OAuth 2.0 Flows. When paired with Azure role-based access control it can be used to control access to Azure Maps REST APIs. Azure role-based access controls are used to designate access to one or more Azure Maps resource account or sub-resources. Any user, group, or service principal can be granted access via a built-in role or a custom role composed of one or more permissions to Azure Maps REST APIs.

To implement scenarios, we recommend viewing authentication concepts. In summary, this security definition provides a solution for modeling application(s) via objects capable of access control on specific APIs and scopes.

Notes

This security definition requires the use of the x-ms-client-id header to indicate which Azure Maps resource the application is requesting access to. This can be acquired from the Maps management API.

The Authorization URL is specific to the Azure public cloud instance. Sovereign clouds have unique Authorization URLs and Microsoft Entra ID configurations. * The Azure role-based access control is configured from the Azure management plane via Azure portal, PowerShell, CLI, Azure SDKs, or REST APIs. * Usage of the Azure Maps Web SDK allows for configuration based setup of an application for multiple use cases.

For more information on Microsoft identity platform, see Microsoft identity platform overview.

Type: oauth2
Flow: implicit
Authorization URL: https://login.microsoftonline.com/common/oauth2/authorize

Scopes

Name	Description
https://atlas.microsoft.com/.default	https://atlas.microsoft.com/.default

subscription-key

This is a shared key that is provisioned when creating an Azure Maps resource through the Azure management plane via Azure portal, PowerShell, CLI, Azure SDKs, or REST APIs.

With this key, any application is authorized to access all REST APIs. In other words, these can currently be treated as master keys to the account which they are issued for.

For publicly exposed applications, our recommendation is to use server-to-server access of Azure Maps REST APIs where this key can be securely stored.

Type: apiKey
In: header

SAS Token

This is a shared access signature token is created from the List SAS operation on the Azure Maps resource through the Azure management plane via Azure portal, PowerShell, CLI, Azure SDKs, or REST APIs.

With this token, any application is authorized to access with Azure role-based access controls and fine-grain control to the expiration, rate, and region(s) of use for the particular token. In other words, the SAS Token can be used to allow applications to control access in a more secured way than the shared key.

For publicly exposed applications, our recommendation is to configure a specific list of allowed origins on the Map account resource to limit rendering abuse and regularly renew the SAS Token.

Type: apiKey
In: header

Examples

PostClosestPoint

Sample request

HTTP

POST https://us.atlas.microsoft.com/spatial/closestPoint/json?api-version=2022-08-01&lat=47.622942&lon=-122.316456

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "geometryId": 1001
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -105.02860293715861,
          40.51615340677395
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {
        "geometryId": 1002
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -105.02860381672178,
          40.51599099003731
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {
        "geometryId": 1003
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -105.02812292879467,
          40.51605867808856
        ]
      }
    }
  ]
}

Sample response

Status code:: 200

{
  "summary": {
    "sourcePoint": {
      "lat": 47.622942,
      "lon": -122.316456
    },
    "udid": null,
    "information": "3 points processed in user data"
  },
  "result": [
    {
      "distanceInMeters": 1587492.66,
      "position": {
        "lat": 40.51615340677395,
        "lon": -105.02860293715861
      },
      "geometryId": "1001"
    }
  ]
}

Definitions

Name	Description
ClosestPoint	Closest Point Result Entry Object
ClosestPointResponse	This object is returned from a successful Spatial Closest Point call
ClosestPointSummary	Closest Point Summary object
ErrorAdditionalInfo	The resource management error additional info.
ErrorDetail	The error detail.
ErrorResponse	Error response
GeoJsonFeature	A valid `GeoJSON Feature` object type. Please refer to RFC 7946 for details.
GeoJsonFeatureCollection	A valid `GeoJSON FeatureCollection` object type. Please refer to RFC 7946 for details.
GeoJsonGeometry	A valid `GeoJSON` geometry object. The type must be one of the seven valid GeoJSON geometry types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon and GeometryCollection. Please refer to RFC 7946 for details.
GeoJsonGeometryCollection	A valid `GeoJSON GeometryCollection` object type. Please refer to RFC 7946 for details.
GeoJsonLineString	A valid `GeoJSON LineString` geometry type. Please refer to RFC 7946 for details.
GeoJsonMultiLineString	A valid `GeoJSON MultiLineString` geometry type. Please refer to RFC 7946 for details.
GeoJsonMultiPoint	A valid `GeoJSON MultiPoint` geometry type. Please refer to RFC 7946 for details.
GeoJsonMultiPolygon	A valid `GeoJSON MultiPolygon` object type. Please refer to RFC 7946 for details.
GeoJsonPoint	A valid `GeoJSON Point` geometry type. Please refer to RFC 7946 for details.
GeoJsonPolygon	A valid `GeoJSON Polygon` geometry type. Please refer to RFC 7946 for details.
JsonFormat	Desired format of the response. Only `json` format is supported.
LatLongPairAbbreviated	A location represented as a latitude and longitude using short names 'lat' & 'lon'.

ClosestPoint

Closest Point Result Entry Object

Name	Type	Description
distanceInMeters	number	The distance in meters from the source point to the closest point
geometryId	string	The unique id identifies a geometry
position	LatLongPairAbbreviated	A location represented as a latitude and longitude using short names 'lat' & 'lon'.

ClosestPointResponse

This object is returned from a successful Spatial Closest Point call

Name	Type	Description
result	ClosestPoint[]	Closest Point Result Array
summary	ClosestPointSummary	Closest Point Summary object

ClosestPointSummary

Closest Point Summary object

Name	Type	Description
information	string	Processing information
sourcePoint	LatLongPairAbbreviated	A location represented as a latitude and longitude using short names 'lat' & 'lon'.
udid	string	A unique data id (udid) for the uploaded content

ErrorAdditionalInfo

The resource management error additional info.

Name	Type	Description
info	object	The additional info.
type	string	The additional info type.

ErrorDetail

The error detail.

Name	Type	Description
additionalInfo	ErrorAdditionalInfo[]	The error additional info.
code	string	The error code.
details	ErrorDetail[]	The error details.
message	string	The error message.
target	string	The error target.

ErrorResponse

Error response

Name	Type	Description
error	ErrorDetail	The error object.

GeoJsonFeature

A valid GeoJSON Feature object type. Please refer to RFC 7946 for details.

Name	Type	Description
featureType	string	The type of the feature. The value depends on the data model the current feature is part of. Some data models may have an empty value.
geometry	GeoJsonGeometry: GeoJsonGeometryCollection GeoJsonLineString GeoJsonMultiLineString GeoJsonMultiPoint GeoJsonMultiPolygon GeoJsonPoint GeoJsonPolygon	A valid `GeoJSON` geometry object. The type must be one of the seven valid GeoJSON geometry types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon and GeometryCollection. Please refer to RFC 7946 for details.
id	string	Identifier for the feature.
type	string: Feature	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonFeatureCollection

A valid GeoJSON FeatureCollection object type. Please refer to RFC 7946 for details.

Name	Type	Description
features	GeoJsonFeature[]	Contains a list of valid `GeoJSON Feature` objects.
type	string: FeatureCollection	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonGeometry

A valid GeoJSON geometry object. The type must be one of the seven valid GeoJSON geometry types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon and GeometryCollection. Please refer to RFC 7946 for details.

Name	Type	Description
type	GeoJsonObjectType	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonGeometryCollection

A valid GeoJSON GeometryCollection object type. Please refer to RFC 7946 for details.

Name	Type	Description
geometries	GeoJsonGeometry[]: GeoJsonGeometryCollection[] GeoJsonLineString[] GeoJsonMultiLineString[] GeoJsonMultiPoint[] GeoJsonMultiPolygon[] GeoJsonPoint[] GeoJsonPolygon[]	Contains a list of valid `GeoJSON` geometry objects. Note that coordinates in GeoJSON are in x, y order (longitude, latitude).
type	string: GeometryCollection	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonLineString

A valid GeoJSON LineString geometry type. Please refer to RFC 7946 for details.

Name	Type	Description
coordinates	number[]	Coordinates for the `GeoJson LineString` geometry.
type	string: LineString	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonMultiLineString

A valid GeoJSON MultiLineString geometry type. Please refer to RFC 7946 for details.

Name	Type	Description
coordinates	number[]	Coordinates for the `GeoJson MultiLineString` geometry.
type	string: MultiLineString	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonMultiPoint

A valid GeoJSON MultiPoint geometry type. Please refer to RFC 7946 for details.

Name	Type	Description
coordinates	number[]	Coordinates for the `GeoJson MultiPoint` geometry.
type	string: MultiPoint	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonMultiPolygon

A valid GeoJSON MultiPolygon object type. Please refer to RFC 7946 for details.

Name	Type	Description
coordinates	number[]	Contains a list of valid `GeoJSON Polygon` objects. Note that coordinates in GeoJSON are in x, y order (longitude, latitude).
type	string: MultiPolygon	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonPoint

A valid GeoJSON Point geometry type. Please refer to RFC 7946 for details.

Name	Type	Description
coordinates	number[]	A `Position` is an array of numbers with two or more elements. The first two elements are longitude and latitude, precisely in that order. Altitude/Elevation is an optional third element. Please refer to RFC 7946 for details.
type	string: Point	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

GeoJsonPolygon

A valid GeoJSON Polygon geometry type. Please refer to RFC 7946 for details.

Name	Type	Description
coordinates	number[]	Coordinates for the `GeoJson Polygon` geometry type.
type	string: Polygon	Specifies the `GeoJSON` type. Must be one of the nine valid GeoJSON object types - Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature and FeatureCollection.

JsonFormat

Desired format of the response. Only json format is supported.

Name	Type	Description
json	string	The JavaScript Object Notation Data Interchange Format

LatLongPairAbbreviated

A location represented as a latitude and longitude using short names 'lat' & 'lon'.

Name	Type	Description
lat	number	Latitude property
lon	number	Longitude property

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