Reference frames
The realization and utilization of geodetic reference systems for practical surveying, for the basis of geographic information systems (GIS) and for cartography is made possible by using geodetic reference frames (coordinates of geodetic control networks and permanent networks).
Global and local reference systems
| Global reference frames | |
|---|---|
| ITRFyy | IERS Terrestrial Reference Frame 19yy/20yy |
| ETRFyy | uropean Terrestrial Reference Frame 19yy/20yy |
| CHTRFyy | Swiss Terrestrial Reference Frame |
| Local Swiss reference frames | |
|---|---|
| LV95 | National control network 1995 |
| LHN95 | National vertical network 1995 |
| LV03 | National surveying 1903 |
| LN02 | National precise levelling 1902 |
Local European reference frames
Besides the European reference frame ETRF89 (GPS network EUREF), older national reference frames (triangulation, levelling) are used in all European countries. For information on these frames and their transformation parameters, please consult with the national surveying institutions.
| Country | Local reference frame 3D / Position | Height | Info |
|---|---|---|---|
| CH / FL | LV03 LV95 | LN02 LHN95 | swisstopo |
| D | DHDN DREF91 | DHHN12 DHHN92 | BKG  |
| F | NTF RGF93 | GF-IGN69/78 | IGN |
| I | SI 40 ED50 | ? | IGM |
| A | MGI / BMN AREF / AGREF | GHA | BEV |
Documentation
- Reference system CH
19.11.2008 | 469 Kb | PDF
- Transformation CH1903 <-> WGS84
19.11.2008 | 113 Kb | PDF
Publications
- CH reference frame LV95
3350 Kb | PDF