@Rally,
You maybe right according to NOAA'S NGDC website [0], Beijing's
magnetic north declination is ~-3° 6' 17" changing by -2.0' per year
which is almost the same degree of "tilting" of the Forbidden City.
[0] http://www.ngdc.noaa.gov/geomag-web/#declination
On Tue, Jan 31, 2012 at 10:30 PM, Rally de Leon wrote:
> Maybe it's aligned to a particular Magnetic North at the time of
> construction?? :-)
>
>
> On Tuesday, January 31, 2012, maning sambale
> wrote:
>> Interesting, i always thought the forbidden city is oriented on a perfect
>> north-south direction. Any idea why its "tilted" in osm?
>>
>>
>> http://wiki.openstreetmap.org/wiki/File:Forbidden_city_2012-01_cloudmade-fresh.png
--
cheers,
maning
--
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
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