Web/API/GeolocationCoordinates/altitude

Secure contextThis feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The GeolocationCoordinates.altitude read-only property is a double representing the altitude of the position in meters above the WGS84 ellipsoid (which defines the nominal sea level surface). This value is null if the implementation cannot provide this data.

Syntax

let alt = geolocationCoordinatesInstance.altitude

Value

A double representing the altitude of the position in meters above the WGS84 ellipsoid.

Specifications

Specification	Status	Comment
Geolocation APIThe definition of 'Coordinates.altitude' in that specification.	Recommendation	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
altitude	Chrome Full support 5	Edge Full support 12	Firefox Full support 3.5	IE Full support 9	Opera Full support 16 Full support 16 No support 10.6 — 15	Safari Full support 5	WebView Android Full support 37	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 16 Full support 16 No support 11 — 14	Safari iOS ?	Samsung Internet Android Full support 1.0

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

See also

• Using the Geolocation API
• The GeolocationCoordinates interface it belongs to.
• National Imagery and Mapping Agency Technical Report 8350.2, Third Edition (WGS84)

GeolocationCoordinates.altitude by Mozilla Contributors is licensed under CC-BY-SA 2.5.