Google Maps just uses a Spherical Mercator projection. That .png looks like
the National Grid (which is a TM projection). Do you have a link to the
original SVG?
--------------------------------------------------
From: "Timothy Green" <[email protected]>
Sent: Monday, November 02, 2009 11:27 PM
To: <[email protected]>; "mySociety public, general purpose discussion
list" <[email protected]>
Subject: Re: [mySociety:public] question for the geogurus
Google maps is apparently UTM (which looks like a complete mess to
tranform) and having a look around wikimedia has revealed nothing useful
about the projection of the election map we have. Hrm.
-t
Seb Bacon wrote:
Hi,
I'm trying to fit the Wikipedia UK election map SVG over the top of
the Google Maps UK outline:
http://maps.google.co.uk/maps?q=http:%2F%2Fwww.democracyclub.org.uk%2Fmedia%2Fall-uk.kml
It doesn't fit. I'm hoping this is some well-known issue around
different projections which I can solve with a transform of some kind.
I'm hoping the answer *isn't* "those maps are just differently
inaccurate".
Cheers
Seb
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