EPSG:21781

CH1903 / LV03 -- Swiss CH1903 / LV03

Available transformations
to EPSG:4151

Selected transformation

Method: NTv2

Grid Files: CHENyx06_ETRS.gsb

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).

Information source: Bundesamt für Landestopografie swisstopo; www.swisstopo.ch

Revision date: 2021-07-16

Attributes

Unit: metre

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: 2015-11-25

Scope: Cadastre, engineering survey, topographic mapping (large and medium scale).

Remarks: Replaces LV03C (CRS code 21780) in Switzerland, but used only occasionally in Liechtenstein. Replaced by CH1903+ / LV95 (CRS code 2056).

Area of use: Liechtenstein; Switzerland.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (Y,X). Orientations: east, north. UoM: m.

Center coordinates
660012.99 185172.18

Projected bounds:
485072.08 74261.66
837118.86 299941.98

WGS84 bounds:
5.96 45.82
10.49 47.81

Liechtenstein; Switzerland.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["CH1903 / LV03",
            BASEGEOGCRS["CH1903",
                DATUM["CH1903",
                    ELLIPSOID["Bessel 1841",6377397.155,299.1528128,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4149]],
            CONVERSION["Swiss Oblique Mercator 1903M",
                METHOD["Hotine Oblique Mercator (variant B)",
                    ID["EPSG",9815]],
                PARAMETER["Latitude of projection centre",46.9524055555556,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8811]],
                PARAMETER["Longitude of projection centre",7.43958333333333,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8812]],
                PARAMETER["Azimuth of initial line",90,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8813]],
                PARAMETER["Angle from Rectified to Skew Grid",90,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8814]],
                PARAMETER["Scale factor on initial line",1,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8815]],
                PARAMETER["Easting at projection centre",600000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8816]],
                PARAMETER["Northing at projection centre",200000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8817]]],
            CS[Cartesian,2],
                AXIS["easting (Y)",east,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["northing (X)",north,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Cadastre, engineering survey, topographic mapping (large and medium scale)."],
                AREA["Liechtenstein; Switzerland."],
                BBOX[45.82,5.96,47.81,10.49]],
            ID["EPSG",21781]]],
    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]],
            USAGE[
                SCOPE["Horizontal component of 3D system."],
                AREA["Liechtenstein; Switzerland."],
                BBOX[45.82,5.96,47.81,10.49]],
            ID["EPSG",4151]]],
    ABRIDGEDTRANSFORMATION["CH1903 to CHTRS95 (1)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","CHENyx06_ETRS.gsb"],
        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: PROJ.4

+proj=somerc +lat_0=46.9524055555556 +lon_0=7.43958333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:21781","+proj=somerc +lat_0=46.9524055555556 +lon_0=7.43958333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "CH1903 / LV03",
        "base_crs": {
            "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
            }
        },
        "conversion": {
            "name": "Swiss Oblique Mercator 1903M",
            "method": {
                "name": "Hotine Oblique Mercator (variant B)",
                "id": {
                    "authority": "EPSG",
                    "code": 9815
                }
            },
            "parameters": [
                {
                    "name": "Latitude of projection centre",
                    "value": 46.9524055555556,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8811
                    }
                },
                {
                    "name": "Longitude of projection centre",
                    "value": 7.43958333333333,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8812
                    }
                },
                {
                    "name": "Azimuth of initial line",
                    "value": 90,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8813
                    }
                },
                {
                    "name": "Angle from Rectified to Skew Grid",
                    "value": 90,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8814
                    }
                },
                {
                    "name": "Scale factor on initial line",
                    "value": 1,
                    "unit": "unity",
                    "id": {
                        "authority": "EPSG",
                        "code": 8815
                    }
                },
                {
                    "name": "Easting at projection centre",
                    "value": 600000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8816
                    }
                },
                {
                    "name": "Northing at projection centre",
                    "value": 200000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8817
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "Y",
                    "direction": "east",
                    "unit": "metre"
                },
                {
                    "name": "Northing",
                    "abbreviation": "X",
                    "direction": "north",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 21781
        }
    },
    "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
        }
    },
    "transformation": {
        "name": "CH1903 to CHTRS95 (1)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "CHENyx06_ETRS.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 7673
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=somerc"
	"lat_0=46.9524055555556"
	"lon_0=7.43958333333333"
	"k_0=1"
	"x_0=600000"
	"y_0=200000"
	"ellps=bessel"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=somerc +lat_0=46.9524055555556 +lon_0=7.43958333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +units=m +no_defs +type=crs">
	<Layer srs="+proj=somerc +lat_0=46.9524055555556 +lon_0=7.43958333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +units=m +no_defs +type=crs">
	</Layer>
</Map>