Web/API/GeolocationCoordinates/altitudeAccuracy

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

The GeolocationCoordinates.altitudeAccuracy read-only property is a strictly positive double representing the accuracy, with a 95% confidence level, of the altitude expressed in meters. This value is null if the implementation doesn't support measuring altitude.

Syntax

let altAcc = geolocationCoordinatesInstance.altitudeAccuracy

Value

A positive double representing the accuracy, with a 95% confidence level, of the altitude expressed in meters.

Specifications

Specification	Status	Comment
Geolocation APIThe definition of 'GeolocationCoordinates.altitudeAccuracy' in that specification.	Recommendation	Initial specification.

Browser compatibility

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
`altitudeAccuracy`	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