Location QML Type

Represents a location update from a position source. More...

Import Statement: import Esri.ArcGISRuntime 100.14
Since: Esri.ArcGISRuntime 100.0
Inherits:

Object

Inherited By:

NmeaLocation

Properties

Detailed Description

Note: You cannot declare or create a component of this type in QML code.

See also LocationDisplay.

Property Documentation

additionalSourceProperties : jsobject

A set of key-value pairs providing additional meta-data and properties about the source of this Location (read-only). A Location object can be created manually or by a variety of AbstractLocationDataSource types, for example from the default platform data source or external GPS.

Mobile devices may provide different details about their in-built location services. For example, Android systems can provide data on the number of satellites used to find a position, whereas on iOS this information is not available. When a given property is not available to the data source the entry should be omitted from the additionalSourceProperties.

The additionalSourceProperties provide a means for the creator of a Location object to record flexible information such as:

  • The confidence level associated with the location.
  • The method used to obtain the location.
  • The provenance of the location.

Information is provided as a set of key-value pairs, where the string key describes the type of data held in the var value. Values must be basic data types such as string, numeric, boolean or date. The creator of the Location can use any string for the key - but the Runtime SDK recognizes a number of well known keys which should be used if available. See LocationSourcePropertiesKeys:

  • "floor" (an integer value). The floor number of the Location when in a building. Use LocationSourcePropertiesKeys::floor to reference this key.
  • "satelliteCount" (an integer value). The number of satellites used to fix the Location. Use LocationSourcePropertiesKeys::satelliteCount to reference this key.
  • "positionSource" (a string value). This key can be used to indicate the position source: GNSS, AppleIPS, BLE, WIFI, CELL, IP. GNSS indicates global navigation satellite system and AppleIPS is Apple’s indoor positioning technology. It is possible to have multiple position sources. In that case positionSource is a list with comma-separated values.

Keys are case-sensitive.

This property was introduced in Esri.ArcGISRuntime 100.14.


course : double

Returns the direction in which the device is traveling (read-only).

The direction is measured in degrees starting at due north and continuing clockwise around the compass. Thus, north is 0 degrees, east is 90 degrees, south is 180 degrees, and so on. Course values may not be available on all devices. A negative value indicates that the direction is invalid.


horizontalAccuracy : double

Returns the radius of uncertainty for the location, measured in meters (read-only).

The position identifies the center of the circle, and this value indicates the radius of that circle. A negative value indicates that the position is invalid.


lastKnown : bool

Indicates whether this is an outdated device position retrieved and cached earlier and therefore not guaranteed to represent the current location.

Returns true if it is based on last known update. It is considered to be of last known update once the LocationDisplay::acquiringTimeoutMs has passed without an update.

Setting this to true will render with the LocationDisplay::acquiringSymbol, typically a grayed out location symbol.


locationType : Enums.LocationType

Returns the LocationType of the location (read-only).

This property was introduced in Esri.ArcGISRuntime 100.10.

See also Enums.LocationType.


position : Point

Returns the coordinates of the position as a Point (read-only).


timestamp : date

The time this location was observed (read-only).

This property was introduced in Esri.ArcGISRuntime 100.8.


velocity : double

Returns the instantaneous speed of the device in meters-per-second (read-only).


verticalAccuracy : double

The vertical accuracy of the location in meters (read-only).


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