FreeDBLibraries  GraphType

Chapter 3: Property Descriptions and Usage

GeoidalHeight

Applies to

GPSFix objects

Description

Indicates the height of the geoid (approximate mean sea level) relative to the World Geodetic System (WGS 84) ellipsoid in meters. The WGS 84 ellipsoid is an earth-fixed global reference frame used as the theoretical sea level by GPS. A negative number indicates that the geoid is below the WGS 84 ellipsoid.

Usage


In scripts

The GeoidalHeight property takes a real value that indicates the difference in height in meters between mean sea level and the WGS 84 ellipsoid. The following example retrieves information about the current fix and writes the difference in height between the geoid and the WSGS 84 ellipsoid to a single line edit box:

li_rc = MyGPS.GetFix(myFix)
sle_1.txt = "Geoidal separation: " +  &
   String(myFix.GeoidalHeight) + "M"





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