EPSG:27493

Datum 73 / Modified Portuguese Grid

Transform Get position on a map

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

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks:

Information source: Centre for Geodesy and Cartography, Portuguese Geographical Institute; http:/www.igeo.pt

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: Datum 73

Datum: Datum 73

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Geodetic Services Directorate, Instituto Geografico e Cadastral, Lisbon; http://www.igeo.pt/

Revision date: 2008-03-14

Scope: Engineering survey, topographic mapping.

Remarks: The projection parameters have been designed such that this CRS grid is almost the same as the Lisbon (Lisbon)/Portuguese Grid (CRS code 20791).

Area of use: Portugal - mainland - onshore.

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

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Center coordinates
22231.36 -12550.28

Projected bounds:
-127052.05 -301740.95
173128.27 278534.97

WGS84 bounds:
-9.56 36.95
-6.19 42.16

Portugal - mainland - onshore.
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Definition: OGC Well Known Text

PROJCS["Datum 73 / Modified Portuguese Grid",
    GEOGCS["Datum 73",
        DATUM["Datum_73",
            SPHEROID["International 1924",6378388,297],
            TOWGS84[-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4274"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",39.6666666666667],
    PARAMETER["central_meridian",-8.13190611111111],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",180.598],
    PARAMETER["false_northing",-86.99],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","27493"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Datum 73 / Modified Portuguese Grid",
    BASEGEOGCRS["Datum 73",
        DATUM["Datum 73",
            ELLIPSOID["International 1924",6378388,297,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4274]],
    CONVERSION["Modified Portuguese Grid",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",39.6666666666667,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-8.13190611111111,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",1,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",180.598,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",-86.99,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["easting (X)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["northing (Y)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["Portugal - mainland - onshore."],
        BBOX[36.95,-9.56,42.16,-6.19]],
    ID["EPSG",27493]]

Definition: ESRI Well Known Text

PROJCS["Datum_73_Modified_Portuguese_Grid",
    GEOGCS["GCS_Datum_73",
        DATUM["D_Datum_73",
            SPHEROID["International_1924",6378388.0,297.0]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",180.598],
    PARAMETER["False_Northing",-86.99],
    PARAMETER["Central_Meridian",-8.13190611111111],
    PARAMETER["Scale_Factor",1.0],
    PARAMETER["Latitude_Of_Origin",39.6666666666667],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=39.6666666666667 +lon_0=-8.13190611111111 +k=1 +x_0=180.598 +y_0=-86.99 +ellps=intl +towgs84=-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:27493","+proj=tmerc +lat_0=39.6666666666667 +lon_0=-8.13190611111111 +k=1 +x_0=180.598 +y_0=-86.99 +ellps=intl +towgs84=-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Datum 73 / Modified Portuguese Grid",
    "base_crs": {
        "name": "Datum 73",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Datum 73",
            "ellipsoid": {
                "name": "International 1924",
                "semi_major_axis": 6378388,
                "inverse_flattening": 297
            }
        },
        "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": 4274
        }
    },
    "conversion": {
        "name": "Modified Portuguese Grid",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 39.6666666666667,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -8.13190611111111,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 1,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 180.598,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": -86.99,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "X",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "Y",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "Portugal - mainland - onshore.",
    "bbox": {
        "south_latitude": 36.95,
        "west_longitude": -9.56,
        "north_latitude": 42.16,
        "east_longitude": -6.19
    },
    "id": {
        "authority": "EPSG",
        "code": 27493
    }
}

Definition: GeoServer

27493=PROJCS["Datum 73 / Modified Portuguese Grid",GEOGCS["Datum 73",DATUM["Datum_73",SPHEROID["International 1924",6378388,297],TOWGS84[-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4274"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",39.6666666666667],PARAMETER["central_meridian",-8.13190611111111],PARAMETER["scale_factor",1],PARAMETER["false_easting",180.598],PARAMETER["false_northing",-86.99],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","27493"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=39.6666666666667"
	"lon_0=-8.13190611111111"
	"k=1"
	"x_0=180.598"
	"y_0=-86.99"
	"ellps=intl"
	"towgs84=-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=39.6666666666667 +lon_0=-8.13190611111111 +k=1 +x_0=180.598 +y_0=-86.99 +ellps=intl +towgs84=-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=39.6666666666667 +lon_0=-8.13190611111111 +k=1 +x_0=180.598 +y_0=-86.99 +ellps=intl +towgs84=-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 27493, 'EPSG', 27493, '+proj=tmerc +lat_0=39.6666666666667 +lon_0=-8.13190611111111 +k=1 +x_0=180.598 +y_0=-86.99 +ellps=intl +towgs84=-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229 +units=m +no_defs +type=crs', 'PROJCS["Datum 73 / Modified Portuguese Grid",GEOGCS["Datum 73",DATUM["Datum_73",SPHEROID["International 1924",6378388,297],TOWGS84[-239.749,88.181,30.488,-0.263,-0.082,-1.211,2.229]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4274"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",39.6666666666667],PARAMETER["central_meridian",-8.13190611111111],PARAMETER["scale_factor",1],PARAMETER["false_easting",180.598],PARAMETER["false_northing",-86.99],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","27493"]]');