EPSG:4815

Greek (Athens)

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

Selected transformation

Remarks:

Information source: OGP

Revision date: 2020-03-14

Steps of transformation: 1761 1891 1272

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

Steps of transformation: 1761 1891 1272

Center coordinates
0.22 38.31

WGS84 bounds:
19.57 34.88
28.3 41.75

Greece - onshore.
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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/v0.4/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)",
            "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)",
        "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>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4815, 'EPSG', 4815, '+proj=longlat +ellps=bessel +pm=athens +towgs84=-199.87,74.79,246.62,0,0,0,0 +no_defs +type=crs', 'None');

Definition: OGC WKT 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]]]