AltitudeReferenceSystem AltitudeReferenceSystem AltitudeReferenceSystem AltitudeReferenceSystem Enum

Definition

Namespace:: Windows.Devices.Geolocation Windows.Devices.Geolocation Windows.Devices.Geolocation Windows.Devices.Geolocation

Edit

Indicates the altitude reference system to be used in defining a geographic shape.

public : enum class AltitudeReferenceSystempublic enum AltitudeReferenceSystemPublic Enum AltitudeReferenceSystem// You can use this enum in JavaScript.

Attributes: ContractVersionAttribute

Windows 10 requirements

Device family	Windows 10 (introduced v10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced v1)

Fields

Ellipsoid Ellipsoid Ellipsoid Ellipsoid	The altitude reference system is based on an ellipsoid which is a mathematical approximation of the shape of the Earth.
Geoid Geoid Geoid Geoid	The altitude reference system is based on the distance above sea level.
Surface Surface Surface Surface	The altitude reference system is based on the distance above the tallest surface structures, such as buildings, trees, roads, etc., above terrain or ground level.
Terrain Terrain Terrain Terrain	The altitude reference system is based on distance above terrain or ground level.
Unspecified Unspecified Unspecified Unspecified	The altitude reference system was not specified.

Remarks

The Terrain, Geoid, and Surface are implementation dependent and not mathematically precise.

Note

The default altitude reference system that is used to provide location data depends on the GPS/GNSS radio hardware. Hardware typically found on older desktop PCs will continue using an Ellipsoid reference system. Everything else will default to using the Geoid reference system. To find out which one is being used by a Geopoint object, see the AltitudeReferenceSystem property.