This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2020.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The altitude read-only property of the GeolocationCoordinates interface 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.
A double representing the altitude of the position in meters above the WGS84 ellipsoid.
| Specification |
|---|
| Geolocation> # altitude-and-altitudeaccuracy-attributes> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
altitude |
5 | 12 | 3.5 | 1610.6–15 | 5 | 18 | 4 | 1611–14 | ≤3 | 1.0 | 4.4 | ≤3 |
GeolocationCoordinates interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/GeolocationCoordinates/altitude