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Polar Stereographic Projection

The Polar Stereographic Projection is a projection derived from the Stereographic Projection for use on the North- and South Pole.

Required Parameters

To convert Polar Stereographic coordinates, the following parameters have to be set:

• False Northing;
• False Easting;
• Latitude Of Origin;
• Central Meridian;
• Scale Factor.

Eye4Software GPS Toolkit

The following code sample (VBScript) shows how to use the Polar Stereographic Projection from the Eye4Software GPS Toolkit:

' This demo translates lat/lon coordinates (WGS84) to UPS South coordinates (WGS84) using
' polar stereographic projection
'
' This demo specifies a map grid based on the Polar Stereographic projection, by setting all geodetic parameters. 
'
' If you want to convert using one of the 4000 grids that are included in the component,
' you should have a look at the demo_gridsimple.vbs demo (recommended for users with less or no experience in geodesy).

Option Explicit

Dim objDatum, objGridSrc, objGridDst, objProjection, objConstants

Set objDatum		= CreateObject ( "Eye4Software.GpsDatumParameters" )
Set objGridSrc 		= CreateObject ( "Eye4Software.GpsGridParameters" )
Set objGridDst 		= CreateObject ( "Eye4Software.GpsGridParameters" )
Set objProjection   	= CreateObject ( "Eye4Software.GpsProjection" )
Set objConstants 	= CreateObject ( "Eye4Software.GpsConstants" )

WScript.Echo "Eye4Software GPS Toolkit " & objProjection.Version & " - Polar Stereographic Projection Demo" 
WScript.Echo

' // Start of parameters part //

' Set Datum: WGS84
objDatum.Axis			= 6378137.000
objDatum.Flattening		= 298.257223563

' Set Source GridL: Latitude/Longitude ( WGS84 )
objGridSrc.Projection		= objConstants.GPS_PROJECTION_NONE
objGridSrc.Datum		= objDatum

' Set destination grid: UPS South ( WGS84 )
objGridDst.Projection		= objConstants.GPS_PROJECTION_POLARSTEREOGRAPHIC
objGridDst.Datum		= objDatum
objGridDst.FalseNorthing	= 2000000.00
objGridDst.FalseEasting		= 2000000.00
objGridDst.OriginLatitude	= -90.0
objGridDst.OriginLongitude	=   0.0

' Set Source coordinates (Geodetic WGS84)
objProjection.Latitude		= -82.734375
objProjection.Longitude		=  87.187500

' // End of parameters part //

' Perform the transformation
WScript.Echo "Convert from Latitude / Longitude to UPS South using polar stereographic projection"
WScript.Echo
WScript.Echo "Latitude    = " & objProjection.Latitude
WScript.Echo "Longitude   = " & objProjection.Longitude
WScript.Echo

objProjection.TransformGrid objGridSrc, objGridDst

' Return the result
WScript.Echo "Result: " & objProjection.LastError & " (" & objProjection.LastErrorDescription & ")"
WScript.Echo
If ( objProjection.LastError = 0 ) Then
	WScript.Echo "Northing    = " & objProjection.Northing
	WScript.Echo "Easting     = " & objProjection.Easting
End If

WScript.Echo "Ready."

Click here to show a list of all supported map projections.