SensorManager.GetAltitude(Single, Single) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Computes the Altitude in meters from the atmospheric pressure and the pressure at sea level.
[Android.Runtime.Register("getAltitude", "(FF)F", "")]
public static float GetAltitude (float p0, float p);[<Android.Runtime.Register("getAltitude", "(FF)F", "")>]
static member GetAltitude : single * single -> singleParameters
- p0
- Single
pressure at sea level
- p
- Single
atmospheric pressure
Returns
Altitude in meters
- Attributes
Remarks
Computes the Altitude in meters from the atmospheric pressure and the pressure at sea level.
Typically the atmospheric pressure is read from a Sensor#TYPE_PRESSURE sensor. The pressure at sea level must be known, usually it can be retrieved from airport databases in the vicinity. If unknown, you can use #PRESSURE_STANDARD_ATMOSPHERE as an approximation, but absolute altitudes won't be accurate.
To calculate altitude differences, you must calculate the difference between the altitudes at both points. If you don't know the altitude as sea level, you can use #PRESSURE_STANDARD_ATMOSPHERE instead, which will give good results considering the range of pressure typically involved.
<ul> float altitude_difference = getAltitude(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, pressure_at_point2) - getAltitude(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, pressure_at_point1); </ul>
Java documentation for android.hardware.SensorManager.getAltitude(float, float).
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.