EPSG:4815

Greek (Athens)

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

  • Greece - onshore. , accuracy 5.0 m, code 8644 (default)

Selected transformation

Remarks:

Information source: OGP

Revision date: 2020-03-14

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Greek (Athens)

Datum: Greek (Athens)

Ellipsoid: Bessel 1841

Prime meridian: Athens

Data source: EPSG

Information source: Topography Department; National Technical University of Greece.

Revision date: 2011-07-20

Scope: Geodesy.

Area of use: Greece - onshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

Covered area powered by MapTiler MapTiler logo
SimpleMap

Center coordinates
0.22 38.31

WGS84 bounds:
19.57 34.88
28.3 41.75

Greece - onshore.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        BOUNDCRS[
            SOURCECRS[
                GEOGCRS["Greek (Athens)",
                    DATUM["Greek (Athens)",
                        ELLIPSOID["Bessel 1841",6377397.155,299.1528128,
                            LENGTHUNIT["metre",1]]],
                    PRIMEM["Athens",23.7163375,
                        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",4815]]],
            TARGETCRS[
                GEOGCRS["Greek",
                    DATUM["Greek",
                        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",4120]]],
            ABRIDGEDTRANSFORMATION["Greek (Athens) to Greek (1)",
                METHOD["Longitude rotation",
                    ID["EPSG",9601]],
                PARAMETER["Longitude offset",85378.815,
                    ID["EPSG",8602]],
                ID["EPSG",1761]]]],
    TARGETCRS[
        GEOGCRS["GGRS87",
            DATUM["Greek Geodetic Reference System 1987",
                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",4121]]],
    ABRIDGEDTRANSFORMATION["Greek to GGRS87 (1)",
        METHOD["Geographic2D offsets",
            ID["EPSG",9619]],
        PARAMETER["Latitude offset",-5.86,
            ID["EPSG",8601]],
        PARAMETER["Longitude offset",0.28,
            ID["EPSG",8602]],
        ID["EPSG",1891]]]

Definition: PROJ.4

+proj=longlat +ellps=bessel +pm=athens +towgs84=-199.87,74.79,246.62,0,0,0,0 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4815","+proj=longlat +ellps=bessel +pm=athens +towgs84=-199.87,74.79,246.62,0,0,0,0 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "BoundCRS",
        "source_crs": {
            "type": "GeographicCRS",
            "name": "Greek (Athens)",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Greek (Athens)",
                "ellipsoid": {
                    "name": "Bessel 1841",
                    "semi_major_axis": 6377397.155,
                    "inverse_flattening": 299.1528128
                },
                "prime_meridian": {
                    "name": "Athens",
                    "longitude": 23.7163375
                }
            },
            "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": 4815
            }
        },
        "target_crs": {
            "type": "GeographicCRS",
            "name": "Greek",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Greek",
                "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": 4120
            }
        },
        "transformation": {
            "name": "Greek (Athens) to Greek (1)",
            "source_crs": {
                "type": "GeographicCRS",
                "name": "Greek (Athens) (with Greenwich prime meridian)",
                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "Greek (Athens) (with Greenwich prime meridian)",
                    "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"
                        }
                    ]
                }
            },
            "method": {
                "name": "Longitude rotation",
                "id": {
                    "authority": "EPSG",
                    "code": 9601
                }
            },
            "parameters": [
                {
                    "name": "Longitude offset",
                    "value": 85378.815,
                    "unit": {
                        "type": "Unit",
                        "name": "",
                        "conversion_factor": 1
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 8602
                    }
                }
            ],
            "id": {
                "authority": "EPSG",
                "code": 1761
            }
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "GGRS87",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Greek Geodetic Reference System 1987",
            "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": 4121
        }
    },
    "transformation": {
        "name": "Greek to GGRS87 (1)",
        "source_crs": {
            "type": "GeographicCRS",
            "name": "Greek (Athens) (with Greenwich prime meridian)",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Greek (Athens) (with Greenwich prime meridian)",
                "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"
                    }
                ]
            }
        },
        "method": {
            "name": "Geographic2D offsets",
            "id": {
                "authority": "EPSG",
                "code": 9619
            }
        },
        "parameters": [
            {
                "name": "Latitude offset",
                "value": -5.86,
                "unit": {
                    "type": "Unit",
                    "name": "",
                    "conversion_factor": 1
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8601
                }
            },
            {
                "name": "Longitude offset",
                "value": 0.28,
                "unit": {
                    "type": "Unit",
                    "name": "",
                    "conversion_factor": 1
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8602
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1891
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=bessel"
	"pm=athens"
	"towgs84=-199.87,74.79,246.62,0,0,0,0"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=bessel +pm=athens +towgs84=-199.87,74.79,246.62,0,0,0,0 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=bessel +pm=athens +towgs84=-199.87,74.79,246.62,0,0,0,0 +no_defs +type=crs">
	</Layer>
</Map>