Description of CRS - FI_KKJ / FI_TM| Attribute | Entry |
|---|
| Country | Finland |
| Country identifier | FI |
| CRS identifier | FI_KKJ / FI_TM |
| CRS alias |
|
| CRS valid area | Finland |
| CRS scope | Coordinates of points of the Finnish Grid coordinate system |
| CRS remarks | The FI_KKJ coordinates are transformed from older national
grid system, namely vvj, using ED50-vvj transformation
computed after the common adjustment in 1966. FI_KKJ
coordinates are not in ED50 system. |
| Datum identifier | KKJ |
| Datum alias | Kartastokoordinaatijärjestelmä |
| Datum type | geodetic |
| Datum anchor point | none, see Datum remarks |
| Datum realization epoch | 1966 |
| Datum valid area | Finland |
| Datum scope | Finish datum for various kinds of mapping and geodetic
purposes |
| Datum remarks | For the older grid system vvj SF31 was the anchor point:
Finland, Helsinki, SF31 with
Lat=60°11'04.0459" N / Lon=24°57'00.8073" E
ED50 coordinates of SF90: Finland, Simsiö, SF90 with
B=62°57'24,2838" / L=22°57'11,7448"
were used as fixed ones in common adjustment made in 1966.
Then the adjusted ED50-coordinates were transformed so that
they would be closer the values they had in vvj-system. |
| Prime meridian identifier | Greenwich |
| Prime meridian greenwich longitude | 0° |
| Prime meridian remarks | |
| Ellipsoid identifier | Hayford 1909 |
| Ellipsoid alias | International 1924 |
| Ellipsoid semi major axis | 6 378 388 m |
| Ellipsoid shape | true |
| Ellipsoid inverse flattening | 297 |
| Ellipsoid remarks | |
| Coordinate system identifier | FI_TM |
| Coordinate system type | projected |
| Coordinate system dimension | 2 |
| Coordinate system remarks | |
| Coordinate system axis name | X / northing |
| Coordinate system axis direction | North |
| Coordinate system axis unit identifier | metre |
| Coordinate system axis name | Y / easting |
| Coordinate system axis direction | East |
| Coordinate system axis unit identifier | metre |
| Operation identifier | FI_TM |
| Operation valid area | Finland |
| Operation scope | |
| Operation method name | Transverse Mercator Projection |
| Operation method name alias | Gauß Krüger Projection |
| Operation method formula | Transverse Mercator Mapping Equations, in Hooijberg,
Practical Geodesy, 1997, pages 81-84 |
| Operation method parameters number | 5 |
| Operation method remarks | special Gauss-Krüger Projection with Central Meridian
27° E extended over the whole country |
| Operation parameter name | latitude of origin |
| Operation parameter value | 0° |
| Operation parameter remarks | 0°, the Equator |
| Operation parameter name | longitude of origin |
| Operation parameter value | 27° E |
| Operation parameter remarks | central meridian for the whole territory of Finland |
| Operation parameter name | false northing |
| Operation parameter value | 0 m |
| Operation parameter remarks | |
| Operation parameter name | false easting |
| Operation parameter value | 3 500 000 m |
| Operation parameter remarks | because the zone number 3 is added to the front of the
actual coordinate value, the false easting is 3 500 000 m. |
| Operation parameter name | scale factor at central meridian |
| Operation parameter value | 1.0000 |
| Operation parameter remarks | |