[postgis-users] Transformation between SWEREF99 TM (3006) and WGS 84 (4326)

[Hugo Wetterberg]

Hi All,
I'm trying to transform 2D points from SWEREF99 TM (3006) to the  
coordinate system used by Google Maps, WGS 84 (4326), the results so  
far are completely off.

I have one test-case for an address in Lund, Sweden that has the  
coordinates [13.083259,55.669587] (long,lat) according to google maps:
http://maps.google.com/maps?f=q&hl=sv&q=Ringv%C3%A4gen,+Lund,+Sk%C3% 
A5ne+L%C3%A4n, 
+Sverige&sll=55.697992,13.181652&sspn=0.016301,0.039911&ie=UTF8&z=15&iwl 
oc=addr&om=1

Those coordinates are probably not spot on, but it gives me an idéa  
of what to expect.

The data that I get from Lantmäteriet, the swedish organization for  
cadastral services, gives the SWEREF99 coordinates [6179129,1345843]  
(lat/X,long/Y) which I try to transform like this:

SELECT AsText(transform(GeomFromText('POINT(6179129 1345843)',3006),  
4326))

This results in the coordinates "POINT(60.8759971959914  
8.54384645182583)" (Hemsedal in norway BTW) when I expected something  
more along the lines of "POINT(55.669587 13.083259)"

Any ideas? All help is appreciated!

Kind regards
Hugo Wetterberg