# GARSession(Geospatial)

Category adding Geospatial functionality to `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session`.

## Summary

| ### Public methods ||
|---|---|
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#checkvpsavailabilityatcoordinate:completionhandler:` | `https://developers.google.com/ar/reference/ios/interface/GARVPSAvailabilityFuture#interface_g_a_r_v_p_s_availability_future *` Gets the availability of the Visual Positioning System (VPS) at a specified horizontal position. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#createanchoronstreetscapegeometry:transform:error:` | `nullable https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *` Creates an anchor at the given transform in the world coordinate space, attached to this `https://developers.google.com/ar/reference/ios/interface/GARStreetscapeGeometry#interface_g_a_r_streetscape_geometry`, and acquires a reference to it. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#createanchorwithcoordinate:altitude:eastupsouthqanchor:error:` | `nullable https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *` Creates a Geospatial anchor at the specified geodetic location and orientation relative to the Earth. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#createanchorwithcoordinate:altitudeaboverooftop:eastupsouthqanchor:completionhandler:error:` | `nullable https://developers.google.com/ar/reference/ios/interface/GARCreateAnchorOnRooftopFuture#interface_g_a_r_create_anchor_on_rooftop_future *` Asynchronously creates a Rooftop anchor at the specified horizontal position and altitude relative to the horizontal position's rooftop. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#createanchorwithcoordinate:altitudeaboveterrain:eastupsouthqanchor:completionhandler:error:` | `nullable https://developers.google.com/ar/reference/ios/interface/GARCreateAnchorOnTerrainFuture#interface_g_a_r_create_anchor_on_terrain_future *` Asynchronously creates a Terrain anchor at a specified horizontal position and altitude relative to the horizontal position's terrain. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#createanchorwithcoordinate:altitudeaboveterrain:eastupsouthqanchor:error:` | `nullable https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *` Creates a Terrain anchor at the specified geodetic location, altitude relative to the horizontal position's terrain and orientation relative to the Earth. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#geospatialtransformfromtransform:error:` | `nullable https://developers.google.com/ar/reference/ios/interface/GARGeospatialTransform#interface_g_a_r_geospatial_transform *` Converts the provided transform to a `https://developers.google.com/ar/reference/ios/interface/GARGeospatialTransform#interface_g_a_r_geospatial_transform` with respect to the Earth. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#isgeospatialmodesupported:` | `BOOL` Determines whether the given geospatial mode is supported on the current device and OS version. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#raycaststreetscapegeometry:direction:error:` | `nullable NSArray< https://developers.google.com/ar/reference/ios/interface/GARStreetscapeGeometryRaycastResult#interface_g_a_r_streetscape_geometry_raycast_result * > *` Performs a raycast against Streetscape Geometry loaded by the scene. |
| `https://developers.google.com/ar/reference/ios/category/GARSession(Geospatial)#transformfromgeospatialcoordinate:altitude:eastupsouthqtarget:error:` | `matrix_float4x4` Converts the provided Earth specified horizontal position, altitude and rotation with respect to an east-up-south coordinate frame to a local transform in world coordinate space. |

## Public methods

### checkVPSAvailabilityAtCoordinate:completionHandler:

```
- (https://developers.google.com/ar/reference/ios/interface/GARVPSAvailabilityFuture#interface_g_a_r_v_p_s_availability_future *)checkVPSAvailabilityAtCoordinate:(CLLocationCoordinate2D) coordinatecompletionHandler:(void(^)(https://developers.google.com/ar/reference/ios/group/GARVPSAvailability#garvpsavailability availability)) completionHandler
```
Gets the availability of the Visual Positioning System (VPS) at a specified horizontal position.

The availability of VPS in a given location helps to improve the quality of Geospatial localization and tracking accuracy.

This launches an asynchronous operation used to query the Google Cloud ARCore API. See `https://developers.google.com/ar/reference/ios/interface/GARFuture#interface_g_a_r_future` for information on obtaining results and cancelling the operation.

Your app must be properly set up to communicate with the Google Cloud ARCore API in order to obtain a result from this call. See [Check VPS Availability](https://developers.google.com/ar/develop/ios/geospatial/check-vps-availability) for more details on setup steps and usage examples.


Details Parameters `coordinate` The coordinate at which to check availability. `completionHandler` [Completion handler](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#using-a-completion-handler-to-obtain-future-results) to be invoked on the Main thread, if not `nil`. **Returns** A handle to the async operation that can be [polled](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#polling-a-future) or [cancelled](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#cancelling-a-future). Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1ab4c2672d3a5f1869663ddb72d1c83189`.

### createAnchorOnStreetscapeGeometry:transform:error:

```
- (nullable https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *)createAnchorOnStreetscapeGeometry:(https://developers.google.com/ar/reference/ios/interface/GARStreetscapeGeometry#interface_g_a_r_streetscape_geometry *) geometrytransform:(matrix_float4x4) transformerror:(NSError **) error
```
Creates an anchor at the given transform in the world coordinate space, attached to this `https://developers.google.com/ar/reference/ios/interface/GARStreetscapeGeometry#interface_g_a_r_streetscape_geometry`, and acquires a reference to it.


Details Parameters `geometry` The object that this anchor will be attached to. `transform` The local transform in world coordinate space. `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current geospatial mode is disabled, or Streetscape Geometry mode is disabled.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodenottracking` - Earth, Session or geometry's `ARTrackingState` is not `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`.
**Returns** The new anchor, or `nil` if there was an error. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1ab595dab465f891d0b7f9c17780cba609`.

### createAnchorWithCoordinate:altitude:eastUpSouthQAnchor:error:

```
- (nullable https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *)createAnchorWithCoordinate:(CLLocationCoordinate2D) coordinatealtitude:(CLLocationDistance) altitudeeastUpSouthQAnchor:(simd_quatf) eastUpSouthQAnchorerror:(NSError **) error
```
Creates a Geospatial anchor at the specified geodetic location and orientation relative to the Earth.

Latitude and longitude are defined by the [WGS84 specification](https://en.wikipedia.org/wiki/World_Geodetic_System), and altitude values are defined as the elevation above the WGS84 ellipsoid in meters.

The rotation provided by `eastUpSouthQAnchor` is a rotation with respect to an east-up-south coordinate frame. An identity rotation will have the anchor oriented such that X+ points to the east, Y+ points up away from the center of the earth, and Z+ points to the south.

An anchor's `https://developers.google.com/ar/reference/ios/interface/GARAnchor#trackingstate` will be `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatepaused` while `https://developers.google.com/ar/reference/ios/interface/GAREarth#interface_g_a_r_earth` is `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatepaused`. The tracking state will permanently become `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped` if the `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session` configuration is set to `https://developers.google.com/ar/reference/ios/group/GARGeospatialMode#gargeospatialmodedisabled`.

Creating anchors near the north pole or south pole is not supported. If the latitude is within 0.1° of the north pole or south pole (90° or -90 °), this function will output `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` and the anchor will fail to be created.


Details Parameters `coordinate` The latitude and longitude associated with the location, specified using the WGS84 reference frame. This must not be within .1° of the North or South pole (i.e. +- 90°). `altitude` Altitude in reference to the WGS 84 ellipsoid, in meters. Positive values indicate altitudes above approximate sea level. Negative values indicate altitudes below approximate sea level. `eastUpSouthQAnchor` Represents the quaternion from the anchor to East-Up-South (EUS) coordinates (i.e., +X points East, +Y points up, and +Z points South). `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current Geospatial mode is disabled or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` - latitude is not within range.
**Returns** The new anchor, or `nil` if there was an error. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a9cdd023e54e8e901277f44a9213a7496`.

### createAnchorWithCoordinate:altitudeAboveRooftop:eastUpSouthQAnchor:completionHandler:error:

```
- (nullable https://developers.google.com/ar/reference/ios/interface/GARCreateAnchorOnRooftopFuture#interface_g_a_r_create_anchor_on_rooftop_future *)createAnchorWithCoordinate:(CLLocationCoordinate2D) coordinatealtitudeAboveRooftop:(CLLocationDistance) altitudeAboveRooftopeastUpSouthQAnchor:(simd_quatf) eastUpSouthQAnchorcompletionHandler:(void(^)(https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *_Nullable anchor, https://developers.google.com/ar/reference/ios/group/GARRooftopAnchorState#garrooftopanchorstate rooftopState)) completionHandlererror:(NSError **) error
```
Asynchronously creates a Rooftop anchor at the specified horizontal position and altitude relative to the horizontal position's rooftop.

See the [Rooftop anchors developer guide](https://developers.google.com/ar/develop/ios/geospatial/anchors#rooftop-anchors) for more information.

The specified `altitudeAboveRooftop` is interpreted to be relative to the top of a building at the given horizontal location, rather than relative to the WGS84 ellipsoid. If there is no building at the given location, then the altitude is interpreted to be relative to the terrain instead. Specifying an altitude of 0 will position the anchor directly on the rooftop whereas specifying a positive altitude will position the anchor above the rooftop, against the direction of gravity.

This launches an asynchronous operation used to query the Google Cloud ARCore API. See `https://developers.google.com/ar/reference/ios/interface/GARFuture#interface_g_a_r_future` for information on obtaining results and cancelling the operation.

You may resolve multiple anchors at a time, but a session cannot be tracking more than 100 Rooftop or Terrain anchors at time. Attempting to resolve more than 100 Rooftop or Terrain anchors will result in `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcoderesourceexhausted`.

Latitude and longitude are defined by the [WGS84 specification](https://en.wikipedia.org/wiki/World_Geodetic_System), and altitude values are defined as the elevation above the WGS84 ellipsoid in meters.

The rotation provided by `eastUpSouthQAnchor` is a rotation with respect to an east-up-south coordinate frame. An identity rotation will have the anchor oriented such that X+ points to the east, Y+ points up away from the center of the earth, and Z+ points to the south.

An anchor's `https://developers.google.com/ar/reference/ios/interface/GARAnchor#trackingstate` will be `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking` while `https://developers.google.com/ar/reference/ios/interface/GAREarth#interface_g_a_r_earth` is `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`. The tracking state will permanently become `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped` if the `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session` configuration is set to `https://developers.google.com/ar/reference/ios/group/GARGeospatialMode#gargeospatialmodedisabled`.

Creating anchors near the north pole or south pole is not supported. If the latitude is within 0.1° of the north pole or south pole (90° or -90°), this function will output `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` and the anchor will fail to be created.


Details Parameters `coordinate` The latitude and longitude associated with the location, specified using the WGS84 reference frame. This must not be within .1° of the North or South pole (i.e. +- 90°). `altitudeAboveRooftop` Altitude above Earth's rooftop or terrain, in meters. `eastUpSouthQAnchor` Represents the quaternion from the anchor to East-Up-South (EUS) coordinates (i.e., +X points East, +Y points up, and +Z points South). `completionHandler` [Completion handler](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#using-a-completion-handler-to-obtain-future-results) to be invoked on the Main thread, if not `nil`. `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current Geospatial mode is disabled or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` - latitude is not within range.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcoderesourceexhausted` - tried to create too many Rooftop or Terrain anchors.
**Returns** A handle to the async operation that can be [polled](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#polling-a-future) or [cancelled](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#cancelling-a-future). Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a7327572429710f770728700026cda16f`.

### createAnchorWithCoordinate:altitudeAboveTerrain:eastUpSouthQAnchor:completionHandler:error:

```
- (nullable https://developers.google.com/ar/reference/ios/interface/GARCreateAnchorOnTerrainFuture#interface_g_a_r_create_anchor_on_terrain_future *)createAnchorWithCoordinate:(CLLocationCoordinate2D) coordinatealtitudeAboveTerrain:(CLLocationDistance) altitudeAboveTerraineastUpSouthQAnchor:(simd_quatf) eastUpSouthQAnchorcompletionHandler:(void(^)(https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *_Nullable anchor, https://developers.google.com/ar/reference/ios/group/GARTerrainAnchorState#garterrainanchorstate terrainState)) completionHandlererror:(NSError **) error
```
Asynchronously creates a Terrain anchor at a specified horizontal position and altitude relative to the horizontal position's terrain.

See the [Terrain anchors developer guide](https://developers.google.com/ar/develop/geospatial/ios/anchors#terrain-anchors) for more information.

The specified `altitudeAboveTerrain` is interpreted to be relative to the Earth's terrain (or floor) at the specified latitude/longitude geodetic coordinates, rather than relative to the WGS-84 ellipsoid. Specifying an `altitudeAboveTerrain` of 0 will position the anchor directly on the terrain whereas specifying a positive `altitudeAboveTerrain` will position the anchor above the terrain, against the direction of gravity.

This launches an asynchronous operation used to query the Google Cloud ARCore API. See `https://developers.google.com/ar/reference/ios/interface/GARFuture#interface_g_a_r_future` for information on obtaining results and cancelling the operation.

You may resolve multiple anchors at a time, but a session cannot be tracking more than 100 Rooftop or Terrain anchors at time. Attempting to resolve more than 100 Rooftop or Terrain anchors will result in `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcoderesourceexhausted`.

Latitude and longitude are defined by the [WGS84 specification](https://en.wikipedia.org/wiki/World_Geodetic_System), and altitude values are defined as the elevation above the WGS84 ellipsoid in meters.

The rotation provided by `eastUpSouthQAnchor` is a rotation with respect to an east-up-south coordinate frame. An identity rotation will have the anchor oriented such that X+ points to the east, Y+ points up away from the center of the earth, and Z+ points to the south.

An anchor's `https://developers.google.com/ar/reference/ios/interface/GARAnchor#trackingstate` will be `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking` while `https://developers.google.com/ar/reference/ios/interface/GAREarth#interface_g_a_r_earth` is `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`. The tracking state will permanently become `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped` if the `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session` configuration is set to `https://developers.google.com/ar/reference/ios/group/GARGeospatialMode#gargeospatialmodedisabled`.

Creating anchors near the north pole or south pole is not supported. If the latitude is within 0.1° of the north pole or south pole (90° or -90°), this function will output `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` and the anchor will fail to be created.


Details Parameters `coordinate` The latitude and longitude associated with the location, specified using the WGS84 reference frame. This must not be within .1° of the North or South pole (i.e. +- 90°). `altitudeAboveTerrain` Altitude above Earth's terrain, in meters. `eastUpSouthQAnchor` Represents the quaternion from the anchor to East-Up-South (EUS) coordinates (i.e., +X points East, +Y points up, and +Z points South). `completionHandler` [Completion handler](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#using-a-completion-handler-to-obtain-future-results) to be invoked on the Main thread, if not `nil`. `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current Geospatial mode is disabled or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` - latitude is not within range.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcoderesourceexhausted` - tried to create too many Rooftop or Terrain anchors.
**Returns** A handle to the async operation that can be [polled](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#polling-a-future) or [cancelled](https://developers.google.com/ar/reference/ios/interface/GARFuture-1future#cancelling-a-future). Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a6f0d8ed8eb67b2cbf00e8ad57ff92755`.

### createAnchorWithCoordinate:altitudeAboveTerrain:eastUpSouthQAnchor:error:

```
- (nullable https://developers.google.com/ar/reference/ios/interface/GARAnchor#interface_g_a_r_anchor *)createAnchorWithCoordinate:(CLLocationCoordinate2D) coordinatealtitudeAboveTerrain:(CLLocationDistance) altitudeAboveTerraineastUpSouthQAnchor:(simd_quatf) eastUpSouthQAnchorerror:(NSError **) error
```
Creates a Terrain anchor at the specified geodetic location, altitude relative to the horizontal position's terrain and orientation relative to the Earth.

Terrain means the ground, or ground floor inside a building with VPS coverage.

The specified `altitudeAboveTerrain` is interpreted to be relative to the Earth's terrain (or floor) at the specified latitude/longitude geodetic coordinates, rather than relative to the WGS-84 ellipsoid. Specifying an `altitudeAboveTerrain` of 0 will position the anchor directly on the terrain (or floor) whereas specifying a positive `altitudeAboveTerrain` will position the anchor above the terrain (or floor), against the direction of gravity.

This function schedules a task to resolve the anchor's pose using the given parameters. You may resolve multiple anchors at a time, but a session cannot be tracking more than 100 Terrain anchors at time. Attempting to resolve more than 100 Terrain anchors will result in `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcoderesourceexhausted`.

If this function returns error nil, the terrain anchor's `https://developers.google.com/ar/reference/ios/category/GARAnchor(Geospatial)#terrainstate` will be `https://developers.google.com/ar/reference/ios/group/GARTerrainAnchorState#garterrainanchorstatetaskinprogress`, and its tracking state will be `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatepaused`. This anchor remains in this state until its pose has been successfully resolved. If the resolving task results in an error, the tracking state will be set to `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.

Latitude and longitude are defined by the [WGS84 specification](https://en.wikipedia.org/wiki/World_Geodetic_System), and altitude values are defined as the elevation above the WGS84 ellipsoid in meters.

The rotation provided by `eastUpSouthQAnchor` is a rotation with respect to an east-up-south coordinate frame. An identity rotation will have the anchor oriented such that X+ points to the east, Y+ points up away from the center of the earth, and Z+ points to the south.

An anchor's `https://developers.google.com/ar/reference/ios/interface/GARAnchor#trackingstate` will be `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking` while `https://developers.google.com/ar/reference/ios/interface/GAREarth#interface_g_a_r_earth` is `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`. The tracking state will permanently become `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped` if the `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session` configuration is set to `https://developers.google.com/ar/reference/ios/group/GARGeospatialMode#gargeospatialmodedisabled`.

Creating anchors near the north pole or south pole is not supported. If the latitude is within 0.1° of the north pole or south pole (90° or -90°), this function will output `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` and the anchor will fail to be created.


Details Parameters `coordinate` The latitude and longitude associated with the location, specified using the WGS84 reference frame. This must not be within .1° of the North or South pole (i.e. +- 90°). `altitudeAboveTerrain` Altitude above Earth's terrain, in meters. `eastUpSouthQAnchor` Represents the quaternion from the anchor to East-Up-South (EUS) coordinates (i.e., +X points East, +Y points up, and +Z points South). `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current Geospatial mode is disabled or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` - latitude is not within range.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcoderesourceexhausted` - tried to create too many Rooftop or Terrain anchors.
**Returns** The new anchor, or `nil` if there was an error. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a5f5941073ee7b5621989d3a692125933`.

### geospatialTransformFromTransform:error:

```
- (nullable https://developers.google.com/ar/reference/ios/interface/GARGeospatialTransform#interface_g_a_r_geospatial_transform *)geospatialTransformFromTransform:(matrix_float4x4) transformerror:(NSError **) error
```
Converts the provided transform to a `https://developers.google.com/ar/reference/ios/interface/GARGeospatialTransform#interface_g_a_r_geospatial_transform` with respect to the Earth.

Its heading will be zero for a `https://developers.google.com/ar/reference/ios/interface/GARGeospatialTransform#interface_g_a_r_geospatial_transform` returned from this method.


Details Parameters `transform` The local transform in world coordinate space. `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current Geospatial mode is disabled or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodenottracking` - Earth's or Session's `ARTrackingState` is not `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`.
**Returns** `https://developers.google.com/ar/reference/ios/interface/GARGeospatialTransform#interface_g_a_r_geospatial_transform`, or `nil` if there was an error. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a8f34a2bedb4a1b2a41fcbdb9d3358e0c`.

### isGeospatialModeSupported:

```
- (BOOL)isGeospatialModeSupported:(https://developers.google.com/ar/reference/ios/group/GARGeospatialMode#gargeospatialmode) geospatialMode
```
Determines whether the given geospatial mode is supported on the current device and OS version.

If this returns NO, then configuring the session with the given geospatial mode will fail with the error code `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeconfigurationnotsupported`. A device may be incompatible with a given mode due to insufficient sensor capabilities.


Details Parameters `geospatialMode` The Geospatial mode. **Returns** YES if the `geospatialMode` is supported, NO otherwise. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1ae0bdf3c3c987a5c3df8914c6fcd3c5a6`.

### raycastStreetscapeGeometry:direction:error:

```
- (nullable NSArray< https://developers.google.com/ar/reference/ios/interface/GARStreetscapeGeometryRaycastResult#interface_g_a_r_streetscape_geometry_raycast_result * > *)raycastStreetscapeGeometry:(simd_float3) origindirection:(simd_float3) directionerror:(NSError **) error
```
Performs a raycast against Streetscape Geometry loaded by the scene.

The raycast result contains the transform of the hit as well as the `https://developers.google.com/ar/reference/ios/interface/GARStreetscapeGeometry#interface_g_a_r_streetscape_geometry` that was hit.

Requires both `https://developers.google.com/ar/reference/ios/category/GARSessionConfiguration(Geospatial)#streetscapegeometrymode` to be set to `https://developers.google.com/ar/reference/ios/group/GARStreetscapeGeometryMode#garstreetscapegeometrymodeenabled` and for `https://developers.google.com/ar/reference/ios/category/GARSessionConfiguration(Geospatial)#geospatialmode` to be set to `https://developers.google.com/ar/reference/ios/group/GARGeospatialMode#gargeospatialmodeenabled`.


Details Parameters `origin` World space origin of the ray. `direction` World space direction of the ray. `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current geospatial mode is disabled, or Streetscape Geometry mode is disabled, or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodenottracking` - Earth, Session, or the geometry's tracking state is not `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`.
**Returns** The list of raycast hits, or `nil` if there was an error. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a79f0cefef3296f54fdc1e44d7cbecff4`.

### transformFromGeospatialCoordinate:altitude:eastUpSouthQTarget:error:

```
- (matrix_float4x4)transformFromGeospatialCoordinate:(CLLocationCoordinate2D) coordinatealtitude:(CLLocationDistance) altitudeeastUpSouthQTarget:(simd_quatf) eastUpSouthQTargeterror:(NSError **) error
```
Converts the provided Earth specified horizontal position, altitude and rotation with respect to an east-up-south coordinate frame to a local transform in world coordinate space.


Details Parameters `coordinate` The latitude and longitude associated with the location, specified using the WGS84 reference frame. This must not be within .1° of the North or South pole (i.e. +- 90°). `altitude` Altitude in reference to the WGS 84 ellipsoid, in meters. Positive values indicate altitudes above approximate sea level. Negative values indicate altitudes below approximate sea level. `eastUpSouthQTarget` Represents the quaternion from the target to East-Up-South (EUS) coordinates (i.e., +X points East, +Y points up, and +Z points South). `error` Out param for an `NSError`. Possible error codes:

- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeillegalstate` - current Geospatial mode is disabled or earth has trackingState `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatestopped`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodenottracking` - Earth's or Session's `ARTrackingState` is not `https://developers.google.com/ar/reference/ios/group/GARTrackingState#gartrackingstatetracking`.
- `https://developers.google.com/ar/reference/ios/group/GARSessionErrorCode#garsessionerrorcodeinvalidargument` - latitude is not within range.
**Returns** a local transform in world coordinate space. Extends class `https://developers.google.com/ar/reference/ios/interface/GARSession#interface_g_a_r_session_1a822bc1ce5bb3c1963568fb6c8cc9207c`.