EPSG:19956

Rectified Skew Orthomorphic Borneo Grid (chain)

Attributes

Data source: EPSG

Information source: Directorate of Colonial Surveys projection tables 1954 revision.

Revision date: 2023-11-22

Scope: Engineering survey, topographic mapping.

Remarks: See 19957 and 19958 for feet and metres versions. If using Hotine Oblique Mercator (variant A) method (code 9812) FE = FN = 0 chSe. Being replaced by metric version (code 19958).

Method: Hotine Oblique Mercator (variant B)

Area of use: Brunei - onshore and offshore; Malaysia - East Malaysia (Sabah; Sarawak) - onshore and offshore.

Description: (0,)

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Brunei - onshore and offshore; Malaysia - East Malaysia (Sabah; Sarawak) - onshore and offshore.

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Definition: OGC Well Known Text

PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"],
PARAMETER["latitude_of_center",4],
PARAMETER["longitude_of_center",115],
PARAMETER["azimuth",53.3158204722222],
PARAMETER["rectified_grid_angle",53.1301023611111],
PARAMETER["scale_factor",0.99984],
PARAMETER["false_easting",590476.87146304],
PARAMETER["false_northing",442857.653094361]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["Rectified Skew Orthomorphic Borneo Grid (chain)",
    METHOD["Hotine Oblique Mercator (variant B)",
        ID["EPSG",9815]],
    PARAMETER["Latitude of projection centre",4,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8811]],
    PARAMETER["Longitude of projection centre",115,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8812]],
    PARAMETER["Azimuth of initial line",53.3158204722222,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8813]],
    PARAMETER["Angle from Rectified to Skew Grid",53.1301023611111,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8814]],
    PARAMETER["Scale factor on initial line",0.99984,
        SCALEUNIT["unity",1],
        ID["EPSG",8815]],
    PARAMETER["Easting at projection centre",29352.4763,
        LENGTHUNIT["British chain (Sears 1922)",20.1167651215526],
        ID["EPSG",8816]],
    PARAMETER["Northing at projection centre",22014.3572,
        LENGTHUNIT["British chain (Sears 1922)",20.1167651215526],
        ID["EPSG",8817]],
    ID["EPSG",19956]]

Definition: ESRI Well Known Text

PROJECTION["Rectified_Skew_Orthomorphic_Center"],
PARAMETER["False_Easting",590476.87146304],
PARAMETER["False_Northing",442857.653094361],
PARAMETER["Scale_Factor",0.99984],
PARAMETER["Azimuth",53.3158204722222],
PARAMETER["Longitude_Of_Center",115.0],
PARAMETER["Latitude_Of_Center",4.0],
PARAMETER["XY_Plane_Rotation",53.1301023611111]

Definition: PROJ.4

+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.87146304 +y_0=442857.653094361

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:19956","+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.87146304 +y_0=442857.653094361");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "Rectified Skew Orthomorphic Borneo Grid (chain)",
    "method": {
        "name": "Hotine Oblique Mercator (variant B)",
        "id": {
            "authority": "EPSG",
            "code": 9815
        }
    },
    "parameters": [
        {
            "name": "Latitude of projection centre",
            "value": 4,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8811
            }
        },
        {
            "name": "Longitude of projection centre",
            "value": 115,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8812
            }
        },
        {
            "name": "Azimuth of initial line",
            "value": 53.3158204722222,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8813
            }
        },
        {
            "name": "Angle from Rectified to Skew Grid",
            "value": 53.1301023611111,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8814
            }
        },
        {
            "name": "Scale factor on initial line",
            "value": 0.99984,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8815
            }
        },
        {
            "name": "Easting at projection centre",
            "value": 29352.4763,
            "unit": {
                "type": "LinearUnit",
                "name": "British chain (Sears 1922)",
                "conversion_factor": 20.1167651215526
            },
            "id": {
                "authority": "EPSG",
                "code": 8816
            }
        },
        {
            "name": "Northing at projection centre",
            "value": 22014.3572,
            "unit": {
                "type": "LinearUnit",
                "name": "British chain (Sears 1922)",
                "conversion_factor": 20.1167651215526
            },
            "id": {
                "authority": "EPSG",
                "code": 8817
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 19956
    }
}

Definition: GeoServer

19956=PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"],PARAMETER["latitude_of_center",4],PARAMETER["longitude_of_center",115],PARAMETER["azimuth",53.3158204722222],PARAMETER["rectified_grid_angle",53.1301023611111],PARAMETER["scale_factor",0.99984],PARAMETER["false_easting",590476.87146304],PARAMETER["false_northing",442857.653094361]

Definition: MapServer - MAPfile

PROJECTION
	"proj=omerc"
	"lat_0=4"
	"lonc=115"
	"alpha=53.3158204722222"
	"gamma=53.1301023611111"
	"k=0.99984"
	"x_0=590476.87146304"
	"y_0=442857.653094361"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.87146304 +y_0=442857.653094361">
	<Layer srs="+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.87146304 +y_0=442857.653094361">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 19956, 'EPSG', 19956, '+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.87146304 +y_0=442857.653094361', 'PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"],PARAMETER["latitude_of_center",4],PARAMETER["longitude_of_center",115],PARAMETER["azimuth",53.3158204722222],PARAMETER["rectified_grid_angle",53.1301023611111],PARAMETER["scale_factor",0.99984],PARAMETER["false_easting",590476.87146304],PARAMETER["false_northing",442857.653094361]');