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LTF2004

Lyon and Turin France uses LTF2004

There are four related CRS for this

LTF2004(C) - EPSG:9549

Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

Unit: meters

LTF2004(G) - EPSG:9546

Ellipsoidal 3D CS. Axes: latitude, longitude, ellipsoidal height. Orientations: north, east, up. UoM: degree, degree, metre.

Unit: degree

LTF2004(G) - EPSG:9547

Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

Unit: degree

LTF2004(G) - EPSG:9545

Cartesian 3D CS (geocentric). Axes: geocentric X Y Z. Orientations: X and Y in equatorial plane, X positive through intersection with prime meridian, Y through 0°N 90°E. Z axis parallel to mean earth rotation axis and positive towards North Pole. UoM: m.

Unit: metre

Differences

EPSG:9545 is a fundamental geocentric system, EPSG:9546 and 9547 are geographic (with and without height), and EPSG:9549 is a planar projected system optimized for mapping and engineering along the railway corridor.

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