Class: Geolocation

ol/Geolocation~Geolocation 


import Geolocation from 'ol/Geolocation.js';

Helper class for providing HTML5 Geolocation capabilities. The Geolocation API is used to locate a user's position.

To get notified of position changes and errors, register listeners for the generic change event and the error event on your instance of Geolocation.

Example:

const geolocation = new Geolocation({
  // take the projection to use from the map's view
  projection: view.getProjection()
});
// listen to changes in position
geolocation.on('change', function(evt) {
  console.log(geolocation.getPosition());
});
// listen to error
geolocation.on('error', function(evt) {
  window.console.log(evt.message);
});

new Geolocation(options)

Geolocation.js, line 120
Name Type Description
tracking boolean (defaults to false)

Start Tracking right after instantiation.
trackingOptions PositionOptions | undefined

Tracking options. See https://www.w3.org/TR/geolocation-API/#position_options_interface.
projection ProjectionLike | undefined

The projection the position is reported in.
Fires:

Extends

Observable Properties

Name Type Settable ObjectEvent type Description
accuracy number | undefined no change:accuracy

The accuracy of the position measurement in meters.
accuracyGeometry Polygon no change:accuracygeometry

A geometry of the position accuracy.
altitude number | undefined no change:altitude

The altitude of the position in meters above mean sea level.
altitudeAccuracy number | undefined no change:altitudeaccuracy

The accuracy of the altitude measurement in meters.
heading number | undefined no change:heading

The heading of the device in radians from north.
position Coordinate | undefined no change:position

The current position of the device reported in the current projection.
projection Projection | undefined yes change:projection

The projection the position is reported in.
speed number | undefined no change:speed

The instantaneous speed of the device in meters per second.
tracking boolean yes change:tracking

The device location is being tracked.
trackingOptions PositionOptions | undefined yes change:trackingoptions

PositionOptions as defined by the HTML5 Geolocation spec .

Methods

changed() inherited

Observable.js, line 68

Increases the revision counter and dispatches a 'change' event.

dispatchEvent(event){boolean | undefined} inherited

events/Target.js, line 85

Dispatches an event and calls all listeners listening for events of this type. The event parameter can either be a string or an Object with a type property.

Name Type Description
event BaseEvent | string

Event object.
Returns:
false if anyone called preventDefault on the event object or if any of the listeners returned false.

get(key){*} inherited

Object.js, line 135

Gets a value.

Name Type Description
key string

Key name.
Returns:
Value.

getAccuracy(){number | undefined}

Geolocation.js, line 269

Get the accuracy of the position in meters.

Returns:
The accuracy of the position measurement in meters.

getAccuracyGeometry(){Polygon}

Geolocation.js, line 279

Get a geometry of the position accuracy.

Returns:
A geometry of the position accuracy.

getAltitude(){number | undefined}

Geolocation.js, line 292

Get the altitude associated with the position.

Returns:
The altitude of the position in meters above mean sea level.

getAltitudeAccuracy(){number | undefined}

Geolocation.js, line 303

Get the altitude accuracy of the position.

Returns:
The accuracy of the altitude measurement in meters.

getHeading(){number | undefined}

Geolocation.js, line 317

Get the heading as radians clockwise from North. Note: depending on the browser, the heading is only defined if the enableHighAccuracy is set to true in the tracking options.

Returns:
The heading of the device in radians from north.

getKeys(){Array.<string>} inherited

Object.js, line 148

Get a list of object property names.

Returns:
List of property names.

getPosition(){Coordinate | undefined}

Geolocation.js, line 328

Get the position of the device.

Returns:
The current position of the device reported in the current projection.

getProjection(){Projection | undefined}

Geolocation.js, line 341

Get the projection associated with the position.

Returns:
The projection the position is reported in.

getProperties(){Object.<string, *>} inherited

Object.js, line 157

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

Observable.js, line 79

Get the version number for this object. Each time the object is modified, its version number will be incremented.

Returns:
Revision.

getSpeed(){number | undefined}

Geolocation.js, line 354

Get the speed in meters per second.

Returns:
The instantaneous speed of the device in meters per second.

getTracking(){boolean}

Geolocation.js, line 364

Determine if the device location is being tracked.

Returns:
The device location is being tracked.

getTrackingOptions(){PositionOptions | undefined}

Geolocation.js, line 377

Get the tracking options. See https://www.w3.org/TR/geolocation-API/#position-options.

Returns:
PositionOptions as defined by the HTML5 Geolocation spec .

on(type, listener){EventsKey | Array<EventsKey>} inherited

Observable.js, line 152

Listen for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

once(type, listener){EventsKey | Array<EventsKey>} inherited

Observable.js, line 164

Listen once for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

set(key, value, silent) inherited

Object.js, line 215

Sets a value.

Name Type Description
key string

Key name.
value *

Value.
silent boolean | undefined

Update without triggering an event.

setProjection(projection)

Geolocation.js, line 390

Set the projection to use for transforming the coordinates.

Name Type Description
projection ProjectionLike

The projection the position is reported in.

setProperties(values, silent) inherited

Object.js, line 235

Sets a collection of key-value pairs. Note that this changes any existing properties and adds new ones (it does not remove any existing properties).

Name Type Description
values Object.<string, *>

Values.
silent boolean | undefined

Update without triggering an event.

setTracking(tracking)

Geolocation.js, line 400

Enable or disable tracking.

Name Type Description
tracking boolean

Enable tracking.

setTrackingOptions(options)

Geolocation.js, line 413

Set the tracking options. See http://www.w3.org/TR/geolocation-API/#position-options.

Name Type Description
options PositionOptions

PositionOptions as defined by the HTML5 Geolocation spec .

un(type, listener) inherited

Observable.js, line 173

Unlisten for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.

unset(key, silent) inherited

Object.js, line 259

Unsets a property.

Name Type Description
key string

Key name.
silent boolean | undefined

Unset without triggering an event.