Geolocation

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This plugin provides information about the device's location, such as latitude and longitude. Common sources of location information include Global Positioning System (GPS) and location inferred from network signals such as IP address, RFID, WiFi and Bluetooth MAC addresses, and GSM/CDMA cell IDs.

This API is based on the W3C Geolocation API Specification, and only executes on devices that don't already provide an implementation.

For iOS you have to add this configuration to your configuration.xml file

<edit-config file="*-Info.plist" mode="merge" target="NSLocationWhenInUseUsageDescription">
   <string>We use your location for full functionality of certain app features.</string>
</edit-config>

Repo: https://github.com/apache/cordova-plugin-geolocation

Installation

Install the Cordova and Ionic Native plugins:

$ ionic cordova plugin add cordova-plugin-geolocation --variable GEOLOCATION_USAGE_DESCRIPTION="To locate you"
$ npm install --save @ionic-native/geolocation@4

Add this plugin to your app's module

Supported platforms

Amazon Fire OS
Android
Browser
iOS
Windows

Usage

import { Geolocation } from '@ionic-native/geolocation';

...

constructor(private geolocation: Geolocation) {}

...

this.geolocation.getCurrentPosition().then((resp) => {
 // resp.coords.latitude
 // resp.coords.longitude
}).catch((error) => {
  console.log('Error getting location', error);
});

let watch = this.geolocation.watchPosition();
watch.subscribe((data) => {
 // data can be a set of coordinates, or an error (if an error occurred).
 // data.coords.latitude
 // data.coords.longitude
});

Instance Members

`getCurrentPosition(options)`

Get the device’s current position.

Param	Type	Details
options	`GeolocationOptions`	The geolocation options.

Returns: Promise<Geoposition> Returns a Promise that resolves with the position of the device, or rejects with an error.

`watchPosition(options)`

Watch the current device’s position. Clear the watch by unsubscribing from Observable changes.

const subscription = this.geolocation.watchPosition()
                              .filter((p) => p.coords !== undefined) //Filter Out Errors
                              .subscribe(position => {
  console.log(position.coords.longitude + ' ' + position.coords.latitude);
});

// To stop notifications
subscription.unsubscribe();

Param	Type	Details
options	`GeolocationOptions`	The geolocation options.

Returns: Observable<Geoposition> Returns an Observable that notifies with the position of the device, or errors.

Coordinates

Param	Type	Details
latitude	`number`	a double representing the position's latitude in decimal degrees.
longitude	`number`	A double representing the position's longitude in decimal degrees.
accuracy	`number`	A double representing the accuracy of the latitude and longitude properties, expressed in meters.
altitude	`number`	A double representing the position's altitude in metres, relative to sea level. This value can be null if the implementation cannot provide the data.
altitudeAccuracy	`number`	A double representing the accuracy of the altitude expressed in meters. This value can be null.
heading	`number`	A double representing the direction in which the device is traveling. This value, specified in degrees, indicates how far off from heading true north the device is. 0 degrees represents true north, and the direction is determined clockwise (which means that east is 90 degrees and west is 270 degrees). If speed is 0, heading is NaN. If the device is unable to provide heading information, this value is null.
speed	`number`	A double representing the velocity of the device in meters per second. This value can be null.

Geoposition

Param	Type	Details
coords	`Coordinates`	A Coordinates object defining the current location
timestamp	`number`	A timestamp representing the time at which the location was retrieved.

PositionError

Param	Type	Details
code	`number`	A code that indicates the error that occurred
message	`string`	A message that can describe the error that occurred

GeolocationOptions

Param	Type	Details
maximumAge	`number`	Is a positive long value indicating the maximum age in milliseconds of a possible cached position that is acceptable to return. If set to 0, it means that the device cannot use a cached position and must attempt to retrieve the real current position. If set to Infinity the device must return a cached position regardless of its age. Default: 0. (optional)
timeout	`number`	Is a positive long value representing the maximum length of time (in milliseconds) the device is allowed to take in order to return a position. The default value is Infinity, meaning that getCurrentPosition() won't return until the position is available. (optional)
enableHighAccuracy	`boolean`	Indicates the application would like to receive the best possible results. If true and if the device is able to provide a more accurate position, it will do so. Note that this can result in slower response times or increased power consumption (with a GPS chip on a mobile device for example). On the other hand, if false, the device can take the liberty to save resources by responding more quickly and/or using less power. Default: false. (optional)