EPSG:22991

Egypt 1907 / Blue Belt

Transform Get position on a map

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

Selected transformation

Method: Molodensky-Badekas (CF geog2D domain)

Remarks: Derived at 30 stations throughout Egypt 1907 network. Accuracy determined at 15 stations 0.7m in each axis. Unified transformation for whole country.

Information source: Survey Research Institute Egypt in Proceedings of the ASPRS 2006 Annual Conference.

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: Egypt 1907

Datum: Egypt 1907

Ellipsoid: Helmert 1906

Prime meridian: Greenwich

Data source: EPSG

Revision date: 2002-07-16

Scope: Military survey.

Remarks: Also known as Egypt 1907 / Green Belt. Oil industry usually uses Egypt 1907 / Red Belt rather than this projected CRS.

Area of use: Egypt - east of 33°E - onshore plus offshore Gulf of Suez.

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

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SimpleMap

Center coordinates
-64078.43 867703.04

Projected bounds:
-768600.65 201463.05
600821.19 1571646.24

WGS84 bounds:
24.7 21.89
37.91 33.82

Egypt - onshore and offshore.
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Definition: OGC Well Known Text

PROJCS["Egypt 1907 / Blue Belt",
    GEOGCS["Egypt 1907",
        DATUM["Egypt_1907",
            SPHEROID["Helmert 1906",6378200,298.3],
            TOWGS84[-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4229"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",30],
    PARAMETER["central_meridian",35],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",300000],
    PARAMETER["false_northing",1100000],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","22991"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Egypt 1907 / Blue Belt",
    BASEGEOGCRS["Egypt 1907",
        DATUM["Egypt 1907",
            ELLIPSOID["Helmert 1906",6378200,298.3,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4229]],
    CONVERSION["Egypt Blue Belt",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",30,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",35,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",1,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",300000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",1100000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Military survey."],
        AREA["Egypt - east of 33°E - onshore plus offshore Gulf of Suez."],
        BBOX[21.97,33,31.36,36.95]],
    ID["EPSG",22991]]

Definition: ESRI Well Known Text

PROJCS["Egypt_Blue_Belt",
    GEOGCS["GCS_Egypt_1907",
        DATUM["D_Egypt_1907",
            SPHEROID["Helmert_1906",6378200.0,298.3]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",300000.0],
    PARAMETER["False_Northing",1100000.0],
    PARAMETER["Central_Meridian",35.0],
    PARAMETER["Scale_Factor",1.0],
    PARAMETER["Latitude_Of_Origin",30.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=30 +lon_0=35 +k=1 +x_0=300000 +y_0=1100000 +ellps=helmert +towgs84=-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:22991","+proj=tmerc +lat_0=30 +lon_0=35 +k=1 +x_0=300000 +y_0=1100000 +ellps=helmert +towgs84=-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Egypt 1907 / Blue Belt",
    "base_crs": {
        "name": "Egypt 1907",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Egypt 1907",
            "ellipsoid": {
                "name": "Helmert 1906",
                "semi_major_axis": 6378200,
                "inverse_flattening": 298.3
            }
        },
        "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": 4229
        }
    },
    "conversion": {
        "name": "Egypt Blue Belt",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 30,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 35,
                "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": 300000,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 1100000,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "E",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "N",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Military survey.",
    "area": "Egypt - east of 33°E - onshore plus offshore Gulf of Suez.",
    "bbox": {
        "south_latitude": 21.97,
        "west_longitude": 33,
        "north_latitude": 31.36,
        "east_longitude": 36.95
    },
    "id": {
        "authority": "EPSG",
        "code": 22991
    }
}

Definition: GeoServer

22991=PROJCS["Egypt 1907 / Blue Belt",GEOGCS["Egypt 1907",DATUM["Egypt_1907",SPHEROID["Helmert 1906",6378200,298.3],TOWGS84[-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4229"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",35],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",1100000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","22991"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=30"
	"lon_0=35"
	"k=1"
	"x_0=300000"
	"y_0=1100000"
	"ellps=helmert"
	"towgs84=-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=30 +lon_0=35 +k=1 +x_0=300000 +y_0=1100000 +ellps=helmert +towgs84=-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=30 +lon_0=35 +k=1 +x_0=300000 +y_0=1100000 +ellps=helmert +towgs84=-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 22991, 'EPSG', 22991, '+proj=tmerc +lat_0=30 +lon_0=35 +k=1 +x_0=300000 +y_0=1100000 +ellps=helmert +towgs84=-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745 +units=m +no_defs +type=crs', 'PROJCS["Egypt 1907 / Blue Belt",GEOGCS["Egypt 1907",DATUM["Egypt_1907",SPHEROID["Helmert 1906",6378200,298.3],TOWGS84[-127.535,113.495,-12.7,1.603747,-0.153612,-5.364408,5.33745]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4229"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",30],PARAMETER["central_meridian",35],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",1100000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","22991"]]');