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Using gPoint for the UK

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Subject:Using gPoint for the UK
Summary:Eastings and Northings don't look right
Author:Matthew Fisher
Date:2012-10-26 21:08:10

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Picture of Matthew Fisher Matthew Fisher - 2012-10-26 21:08:10
I'm trying to write some code that derives the Eastings and Northings (X, Y) from an IP address. The Geoplugin utility gives me the following information for my own IP Address as:

Town: Sutton (incorrect, it should be Croydon but never mind)
Latitude: 51.349998474121
Longitude: -0.20000000298023

When I plug these into gPoint I get:
Northing: 5692469, Easting: 694976

However according to this webpage: the correct values are:
Easting/Northing 525734, 163695

These values are totally different. Do I have to use a different ellipsoid for the UK? Or am I doing something else wrong?

My email is maf9222 at yahoo dot co dot uk.

Any advice would be greatly appreciated.


Matthew Fisher