WGS84 to KKJ converter

KKJ is not defined outside Finland!

This tool can be used to link WGS84 coordinates to map services that accept Finnish KKJ national grid coordinate system based coordinates only.
It converts the coordinates, subtracts the reference point, and redirects to the requested service with the results.

Formula used to localise coordinates:
P_KKJ = P_{KKJ reference point} + P_{KKJ local}
I_KKJ = I_{KKJ reference point} + I_{KKJ local}

Usage example:
kkj?latdegdec=60.168333&londegdec=24.95625&Pref=6600000&Iref=2500000&link=http://kartta.hel.fi/opas/main/?l=1&m=1&o=1&n={Plocal}&e={Ilocal}

Where:

latdegdec	WGS84 latitude in decimal degrees
londegdec	WGS84 longitude in decimal degrees
Pref	PKKJ reference point used in the map service
Iref	IKKJ reference point used in the map service
link	HTTP link to the map service, where {Plocal} and {Ilocal} will be replaced with PKKJ local and IKKJ local respectively, and {PlocalS}, {PlocalN}, {IlocalW} and {IlocalE} with the viewpoint boundaries.

All parameters are required.

The WGS84 to KKJ code was written by Matti Aarnio and is available from http://www.viestikallio.fi/tools/kkj-wgs84.php.