Spatial - Get Geofence
Use to get the proximity of a coordinate to a geofence.
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 Get Geofence
API is an HTTP GET
request that retrieves the proximity of a coordinate to a geofence that has been uploaded to the Data registry. You upload a geofence or set of fences into an Azure Storage Account, then register it with your Azure Maps Account using the Data registry, for more information see How to create data registry. For more information on on the geofence data format, see Geofencing GeoJSON data. To query the proximity of a coordinate, you supply the location of the object you are tracking as well as the ID for the fence or set of fences, and the response will contain information about the distance from the outer edge of the geofence. A negative value signifies that the coordinate is inside of the fence while a positive value means that it is outside of the fence.
This API can be used for a variety of scenarios that include things like asset tracking, fleet management, or setting up alerts for moving objects.
The API supports integration with Event Grid. The isAsync parameter is used to enable integration with Event Grid (disabled by default). To test this API, you can upload the sample data from Post Geofence API examples (Request Body) using the Data registry service and replace the {udid}
from the sample request below with the udid
used to create the Data registry. For more information on the data registry service, see How to create data registry.
Geofencing InnerError code
In geofencing response error contract, innererror
is an object containing service specific information about the error. code
is a property in innererror
which can map to a specific geofencing error type. The table belows shows the code mapping between all the known client error type to the corresponding geofencing error message
.
innererror.code | error.message |
---|---|
NullDeviceId | Device Id should not be null. |
NullUdid | Udid should not be null. |
UdidWrongFormat | Udid should be acquired from user data ingestion API. |
InvalidUserTime | Usertime is invalid. |
InvalidSearchBuffer | Searchbuffer is invalid. |
InvalidSearchRange | The value range of searchbuffer should be from 0 to 500 meters. |
InvalidLatLon | Lat and/or lon parameters are invalid. |
InvalidIsAsyncValue | The IsAsync parameter is invalid. |
InvalidModeValue | The mode parameter invalid. |
InvalidJson | Geofencing data is not a valid json file. |
NotSupportedGeoJson | Geofencing data can't be read as a Feature or FeatureCollections. |
InvalidGeoJson | Geofencing data is invalid. |
NoUserDataWithAccountOrSubscription | Can't find user geofencing data with provided account-id and/or subscription-id. |
NoUserDataWithUdid | Can't find user geofencing data with provided udid. |
GET https://{geography}.atlas.microsoft.com/spatial/geofence/json?api-version=2022-08-01&deviceId={deviceId}&udid={udid}&lat={lat}&lon={lon}
GET https://{geography}.atlas.microsoft.com/spatial/geofence/json?api-version=2022-08-01&deviceId={deviceId}&udid={udid}&lat={lat}&lon={lon}&z={z}&userTime={userTime}&searchBuffer={searchBuffer}&isAsync={isAsync}&mode={mode}
URI Parameters
Name | In | Required | Type | Description |
---|---|---|---|---|
format
|
path | True |
Desired format of the response. Only |
|
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 |
api-version
|
query | True |
string |
Version number of Azure Maps API. |
device
|
query | True |
string |
ID of the device |
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. |
udid
|
query | True |
string |
The unique id used when creating a Data registry to upload a valid GeoJSON FeatureCollection object. Please refer to RFC 7946 for details. All the feature's properties should contain |
is
|
query |
boolean |
If true, the request will use async event mechanism; if false, the request will be synchronized and do not trigger any event. The default value is false. |
|
mode
|
query |
Mode of the geofencing async event mechanism. |
||
search
|
query |
number |
The radius of the buffer around the geofence in meters that defines how far to search inside and outside the border of the fence against the coordinate that was provided when calculating the result. The minimum value is 0, and the maximum is 500. The default value is 50. |
|
user
|
query |
string date-time |
The user request time. If not presented in the request, the default value is DateTime.Now. |
|
z
|
query |
number |
The sea level in meter of the location being passed. If this parameter is presented, 2D extrusion is used. Example: 200. |
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. |
Responses
Name | Type | Description |
---|---|---|
200 OK |
OK The X-Correlation-id header value is present in an async call's response and the Event Grid event data. It helps correlate the async call’s response with the corresponding Event Grid event. Headers X-Correlation-id: string |
|
Other Status Codes |
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
GetGeofence
Sample request
GET https://us.atlas.microsoft.com/spatial/geofence/json?api-version=2022-08-01&deviceId=unique_device_name_under_account&udid=f6495f62-94f8-0ec2-c252-45626f82fcb2&lat=48.36&lon=-124.63&userTime=2022-08-21T17:32:28Z&searchBuffer=50&isAsync=True&mode=EnterAndExit
Sample response
{
"geometries": [
{
"deviceId": "unique_device_name_under_account",
"udId": "f6495f62-94f8-0ec2-c252-45626f82fcb2",
"geometryId": "2",
"distance": 999,
"nearestLat": 47.621954,
"nearestLon": -122.131841
},
{
"deviceId": "unique_device_name_under_account",
"udId": "f6495f62-94f8-0ec2-c252-45626f82fcb2",
"geometryId": "1",
"distance": -999,
"nearestLat": 47.609833,
"nearestLon": -122.148274
}
],
"expiredGeofenceGeometryId": [
"5"
],
"invalidPeriodGeofenceGeometryId": [
"3",
"4"
],
"isEventPublished": true
}
Definitions
Name | Description |
---|---|
Error |
The resource management error additional info. |
Error |
The error detail. |
Error |
Error response |
Geofence |
This object is returned from a geofence proximity call. |
Geofence |
The geofencing geometry. |
Geofence |
Mode of the geofencing async event mechanism. |
Json |
Desired format of the response. Only |
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 |
The error additional info. |
|
code |
string |
The error code. |
details |
The error details. |
|
message |
string |
The error message. |
target |
string |
The error target. |
ErrorResponse
Error response
Name | Type | Description |
---|---|---|
error |
The error object. |
Geofence
This object is returned from a geofence proximity call.
Name | Type | Description |
---|---|---|
expiredGeofenceGeometryId |
string[] |
Lists of the geometry ID of the geofence which is expired relative to the user time in the request. |
geometries |
Lists the fence geometries that contain the coordinate position or overlap the searchBuffer around the position. |
|
invalidPeriodGeofenceGeometryId |
string[] |
Lists of the geometry ID of the geofence which is in invalid period relative to the user time in the request. |
isEventPublished |
boolean |
True if at least one event is published to the Azure Maps event subscriber, false if no event is published to the Azure Maps event subscriber. This will only be presented in response when 'isAsync' query parameter is set to true. |
GeofenceGeometry
The geofencing geometry.
Name | Type | Description |
---|---|---|
deviceId |
string |
ID of the device. |
distance |
number |
Distance from the coordinate to the closest border of the geofence (in meters except when special values -999/999 are used). Positive means the coordinate is outside of the geofence. If the coordinate is outside of the geofence, but more than the value of searchBuffer away from the closest geofence border, then the value is 999. Negative means the coordinate is inside of the geofence. If the coordinate is inside the polygon, but more than the value of searchBuffer away from the closest geofencing border, then the value is -999. A value of 999 means that there is great confidence the coordinate is well outside the geofence. A value of -999 means that there is great confidence the coordinate is well within the geofence. |
geometryId |
string |
The unique id identifies a geometry. |
nearestLat |
number |
Latitude of the nearest point of the geometry. |
nearestLon |
number |
Longitude of the nearest point of the geometry. |
nearestZ |
number |
Sea level in meter of the nearest point on the 2D extrusion geometry. This will only be presented in response when value is provided for 'zInMeter' in the request. |
udId |
string |
The unique id used when creating a Data registry to upload a valid GeoJSON FeatureCollection object. Please refer to RFC 7946 for details. All the feature's properties should contain |
GeofenceMode
Mode of the geofencing async event mechanism.
Name | Type | Description |
---|---|---|
All |
string |
Publish all the query results to Azure Maps account event subscription. |
EnterAndExit |
string |
Only publish result when user location is considered as crossing geofencing boarder. |
JsonFormat
Desired format of the response. Only json
format is supported.
Name | Type | Description |
---|---|---|
json |
string |