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Geodetic CRS: CH1903
Datum: CH1903
Ellipsoid: Bessel 1841
Prime meridian: Greenwich
Data source: EPSG
Information source: Bundesamt für Landestopografie swisstopo; www.swisstopo.ch
Revision date: 2021-07-16
Scope: Approximation (to better than 2cm) using NTv2 method of results of FINELTRA programme concatenated with LV-95 parameters.
Remarks: Equivalent to concatenation of transformations 15486 (CH1903 to CH1903+) and 1509 (CH1903+ to CHTRS95) to within 2cm. Also used as transformation between CH1903 and ETRS89 (see code 7674).
Method: NTv2
Area of use: Liechtenstein; Switzerland.
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["CH1903 to CHTRS95 (1)", VERSION["BfL-Che NTv2"], SOURCECRS[ GEOGCRS["CH1903", DATUM["CH1903", ELLIPSOID["Bessel 1841",6377397.155,299.1528128, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4149]]], TARGETCRS[ GEOGCRS["CHTRS95", DATUM["Swiss Terrestrial Reference System 1995", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4151]]], METHOD["NTv2", ID["EPSG",9615]], PARAMETERFILE["Latitude and longitude difference file","CHENyx06_ETRS.gsb"], OPERATIONACCURACY[0.25], USAGE[ SCOPE["Approximation (to better than 2cm) using NTv2 method of results of FINELTRA programme concatenated with LV-95 parameters."], AREA["Liechtenstein; Switzerland."], BBOX[45.82,5.96,47.81,10.49]], ID["EPSG",7673], REMARK["Equivalent to concatenation of transformations 15486 (CH1903 to CH1903+) and 1509 (CH1903+ to CHTRS95) to within 2cm. Also used as transformation between CH1903 and ETRS89 (see code 7674)."]]
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:7673","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=ch_swisstopo_CHENyx06_ETRS.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "CH1903 to CHTRS95 (1)", "source_crs": { "type": "GeographicCRS", "name": "CH1903", "datum": { "type": "GeodeticReferenceFrame", "name": "CH1903", "ellipsoid": { "name": "Bessel 1841", "semi_major_axis": 6377397.155, "inverse_flattening": 299.1528128 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4149 } }, "target_crs": { "type": "GeographicCRS", "name": "CHTRS95", "datum": { "type": "GeodeticReferenceFrame", "name": "Swiss Terrestrial Reference System 1995", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4151 } }, "method": { "name": "NTv2", "id": { "authority": "EPSG", "code": 9615 } }, "parameters": [ { "name": "Latitude and longitude difference file", "value": "CHENyx06_ETRS.gsb", "id": { "authority": "EPSG", "code": 8656 } } ], "accuracy": "0.25", "scope": "Approximation (to better than 2cm) using NTv2 method of results of FINELTRA programme concatenated with LV-95 parameters.", "area": "Liechtenstein; Switzerland.", "bbox": { "south_latitude": 45.82, "west_longitude": 5.96, "north_latitude": 47.81, "east_longitude": 10.49 }, "id": { "authority": "EPSG", "code": 7673 }, "remarks": "Equivalent to concatenation of transformations 15486 (CH1903 to CH1903+) and 1509 (CH1903+ to CHTRS95) to within 2cm. Also used as transformation between CH1903 and ETRS89 (see code 7674)." }
Definition: MapServer - MAPfile
PROJECTION "proj=pipeline" "step" "proj=axisswap" "order=2,1" "step" "proj=unitconvert" "xy_in=deg" "xy_out=rad" "step" "proj=hgridshift" "grids=ch_swisstopo_CHENyx06_ETRS.tif" "step" "proj=unitconvert" "xy_in=rad" "xy_out=deg" "step" "proj=axisswap" "order=2,1" END
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=ch_swisstopo_CHENyx06_ETRS.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1"> <Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=ch_swisstopo_CHENyx06_ETRS.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 7673, 'EPSG', 7673, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=ch_swisstopo_CHENyx06_ETRS.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');
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