All Cadcorp SIS API Methods

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
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)