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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.
A double representing the altitude of the position in meters above the WGS84 ellipsoid.
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| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
altitude |
5 | 12 | 3.5 | 9 | 1610.6–15 | 5 | ≤37 | 18 | 4 | 1611–14 | ≤3 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/GeolocationCoordinates/altitude