The files in this section result from the conversion of datasets originating from Swisstopo
Source: swisstopo
Format: GeoTIFF converted from NTv2.0 (.gsb)
License: Creative Commons CC0 1.0 Universal
Credit: (c) 2007 swisstopo
Recommended to transform from Swiss reference frame LV03 (system CH1903, EPSG:21781) to Swiss reference frame LV95 (system CH1903+, EPSG:2056). LV95 is aligned to ETRF93, but shifted by several 100 meters. CH1903+ is the official reference system for federal surveying and for all national geobasis data regulated by federal law since 2017. CHENyx06a.gsb gives corrections (distorsions between LV03 and LV95) in CH1903, CHENyx06_ETRS.gsb gives the corrections in ETRS. Several transformation services are available on https://www.swisstopo.admin.ch/en/maps-data-online/calculation-services.html (web forms and REST web geoservices) to support the exact transformation procedure between CH1903 and CH1903+ using the REFRAME algorithm (finite element transformation). The difference between the grid and finite element transformation is on a level of below several millimeters.
- ch_swisstopo_CHENyx06a.tif
- ch_swisstopo_CHENyx06_ETRS.tif
Source: swisstopo
Format: GeoTIFF converted from 'Arc/Info ASCII Grid'
License: Creative Commons CC0 1.0 Universal
Credit: (c) swisstopo
Horizontal CRS: EPSG:4937 (ETRS89)
Two vertical transformations based on CHTRF95 for Geoid model CHGeo2004. Used to make the transitions from heights in vertical CRS (EPSG:5729 - LHN95 heigh) or (EPSG:5728 - LN02 height) to heights above the ellipsoid in ETRS89 (EPSG:4937).
- ch_swisstopo_chgeo2004_ETRS89_LHN95.tif
- ch_swisstopo_chgeo2004_ETRS89_LN02.tif