All Cadcorp SIS API Methods

DefineNolPrjLatLon Method

Description

Creates a named Latitude/Longitude Coordinate Reference System in a Named Object Library, replacing any existing Coordinate Reference System with the same name.

Syntax

Public Function DefineNolPrjLatLon( _
   ByVal prj As String, _
   ByVal lat As Double, _
   ByVal lon As Double, _
   ByVal datum As String, _
   ByVal bDeg As Integer _
) As Integer

Parameters

prj

The named Coordinate Reference System to create, or replace.

 

lat

The Coordinate Reference System latitude origin, in degrees. See Remarks.

 

lon

The Coordinate Reference System longitude origin, in degrees. See Remarks.

 

datum

The named Geodetic Datum on which to base the coordinate reference system. This can be any named Geodetic Datum previously created, or loaded from a Named Object Library.

 

bDeg

True	Store coordinates in degrees.
False	Store coordinates in radians.

Remarks

A (0.0,0.0) origin should normally be used when matching a Coordinate Reference System to external data. If the Coordinate Reference System is going to be used for creating new data then using a local (lat,lon) origin near the centre of the expected extents allows Spatial References to be used with a smaller span, thus increasing the Spatial Reference resolution.

Available: GEO D OM OD SISpy

Groups:

• Coordinate Methods
• Named Object Library Methods

Example

sis.DefineNolPrjLatLon("NewProj", 0.0, 0.0, "USER90", 0)