DefineNolDatum Method
Description
Creates a named Geodetic Datum in a Named Object Library, using the standard seven Bursa-Wolf parameters to modify WGS84, replacing any existing Geodetic Datum with the same name.
Syntax
Visual Basic |
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Public Function DefineNolDatum( _ ByVal datum As String, _ ByVal re As Double, _ ByVal rp As Double, _ ByVal dx As Double, _ ByVal dy As Double, _ ByVal dz As Double, _ ByVal ex As Double, _ ByVal ey As Double, _ ByVal ez As Double, _ ByVal m As Double, _ ByVal pm As Double _ ) As Integer |
Parameters
- datum
- The named Geodetic Datum to create, or replace.
- re
- The equatorial radius of the ellipsoid, specified in metres.
- rp
- The polar radius of the ellipsoid, specified in metres.
- dx
- The x shift to apply to the ellipsoid, specified in metres.
- dy
- The y shift to apply to the ellipsoid, specified in metres.
- dz
- The z shift to apply to the ellipsoid, specified in metres.
- ex
- The rotational adjustment about the x axis, specified in minutes of arc.
- ey
- The rotational adjustment about the y axis, specified in minutes of arc.
- ez
- The rotational adjustment about the z axis, specified in minutes of arc.
- m
- The correction scale factor, specified in parts per million. Use 0.0 for no scale correction.
- pm
- The Prime Meridian, specified in radians. At present, this parameter is ignored, and must be specified as 0.0.
Remarks
Available: GEO D OM OD SISpy
Groups:
Example
sis.DefineNolDatum ("USER90", 6378206, 6356584, –4, –102, –129, -0.2570, 0.3410, -0.0880, 3.7230, 0)