Reference systems
We use different national and global reference systems in Switzerland. On the basis of an exactly definied transition to the global systems, a precise positioning with the modern local reference systems is possible.
Global terrestrial reference systems
Global terrestrial reference systems are geocentric Cartesian coordinate systems with their origin in the earth's center of gravity M. A «Conventional Terrestrial System» (CTS) has its point of origin at M, its Z axis passing through the north pole («Conventional International Origin: CIO»), its XZ plane passing through the mean zero point in Greenwich, and its Y axis completing the definition of a right-handed coordinate system.
- Conventional Terrestrial System (CTS)
Local reference systems
Local reference systems are national coordinate and height systems which are used for official national and cadastral surveying. Included are also the local reference ellipsoids and the map projections with their specific national coordinate systems.
Further information
Documentation
- CH reference frame LV95
3350 Kb | PDF
- Reference system CH
19.11.2008 | 469 Kb | PDF