EPSG:29871 — Timbalai 1948 / RSO Borneo (ch)

Projected · Asia - Brunei and East Malaysia

Export Formats

OGC WKT

PROJCS[
    "Timbalai 1948 / RSO Borneo (ch)",
    GEOGCS[
        "Timbalai 1948",
        DATUM[
            "Timbalai_1948",
            SPHEROID["Everest 1830 (1967 Definition)",6377298.556,300.8017],
            TOWGS84[-679,669,-48,0,0,0,0]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4298"]
    ],
    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",29352.4763],
    PARAMETER["false_northing",22014.3572],
    UNIT["British chain (Sears 1922)",20.1167651215526],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","29871"]
]

WKT2

PROJCRS[
    "Timbalai 1948 / RSO Borneo (ch)",
    BASEGEOGCRS[
        "Timbalai 1948",
        DATUM[
            "Timbalai 1948",
            ELLIPSOID[
                "Everest 1830 (1967 Definition)",
                6377298.556,
                300.8017,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7016]
            ],
            ID["EPSG",6298]
        ],
        ID["EPSG",4298]
    ],
    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",9102]],
            ID["EPSG",8811]
        ],
        PARAMETER[
            "Longitude of projection centre",
            115,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8812]
        ],
        PARAMETER[
            "Azimuth at projection centre",
            53.3158204722225,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8813]
        ],
        PARAMETER[
            "Angle from Rectified to Skew Grid",
            53.1301023611114,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8814]
        ],
        PARAMETER[
            "Scale factor at projection centre",
            0.99984,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8815]
        ],
        PARAMETER[
            "Easting at projection centre",
            29352.4763,
            LENGTHUNIT["British chain (Sears 1922)",20.1167651215526,ID["EPSG",9042]],
            ID["EPSG",8816]
        ],
        PARAMETER[
            "Northing at projection centre",
            22014.3572,
            LENGTHUNIT["British chain (Sears 1922)",20.1167651215526,ID["EPSG",9042]],
            ID["EPSG",8817]
        ],
        ID["EPSG",19956]
    ],
    CS[Cartesian,2,ID["EPSG",4402]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["British chain (Sears 1922)",20.1167651215526,ID["EPSG",9042]],
    ID["EPSG",29871]
]

PROJ.4

+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +to_meter=20.1167651215526 +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:29871", "+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +to_meter=20.1167651215526 +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 29871,
  "name": "Timbalai 1948 / RSO Borneo (ch)",
  "kind": "projected",
  "area": "Asia - Brunei and East Malaysia",
  "unit": "British chain (Sears 1922)",
  "bbox": [
    0.85,
    109.31,
    7.67,
    119.61
  ],
  "proj4": "+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +to_meter=20.1167651215526 +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (29871, 'EPSG', 29871, '+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +to_meter=20.1167651215526 +no_defs +type=crs', 'PROJCS["Timbalai 1948 / RSO Borneo (ch)",GEOGCS["Timbalai 1948",DATUM["Timbalai_1948",SPHEROID["Everest 1830 (1967 Definition)",6377298.556,300.8017],TOWGS84[-679,669,-48,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4298"]],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",29352.4763],PARAMETER["false_northing",22014.3572],UNIT["British chain (Sears 1922)",20.1167651215526],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","29871"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=omerc"
  "+lat_0=4"
  "+lonc=115"
  "+alpha=53.3158204722222"
  "+gamma=53.1301023611111"
  "+k=0.99984"
  "+x_0=590476.871463039"
  "+y_0=442857.65309436"
  "+ellps=evrstSS"
  "+towgs84=-679,669,-48,0,0,0,0"
  "+to_meter=20.1167651215526"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

29871=PROJCS["Timbalai 1948 / RSO Borneo (ch)",GEOGCS["Timbalai 1948",DATUM["Timbalai_1948",SPHEROID["Everest 1830 (1967 Definition)",6377298.556,300.8017],TOWGS84[-679,669,-48,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4298"]],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",29352.4763],PARAMETER["false_northing",22014.3572],UNIT["British chain (Sears 1922)",20.1167651215526],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","29871"]]

Related Coordinate Systems

Available Transformations (8)

Transformations inherited from base CRS: EPSG:4298 (Timbalai 1948)

Transformation	Source → Target	Accuracy (m)
Timbalai 1948 to WGS 84 (5)	4298 → 4326	1
Timbalai 1948 to GDBD2009 (1)	4298 → 5246	1
Timbalai 1948 to WGS 84 (2)	4298 → 4326	5
Timbalai 1948 to WGS 84 (4)	4298 → 4326	5
Timbalai 1948 to WGS 84 (6)	4298 → 4326	6
Timbalai 1948 to WGS 84 (1)	4298 → 4326	19
Timbalai 1948 to WGS 84 (3)	4298 → 4326	100
Timbalai 1948 to GDBD2009 (1) Deprecated	4298 → 4326	1

Other CRS using Timbalai 1948

Frequently Asked Questions

How do I add EPSG:29871 to GeoServer?

Add the following definition to your GeoServer configuration:

29871=PROJCS["Timbalai 1948 / RSO Borneo (ch)",GEOGCS["Timbalai 1948",DATUM["Timbalai_1948",SPHEROID["Everest 1830 (1967 Definition)",6377298.556,300.8017],TOWGS84[-679,669,-48,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4298"]],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",29352.4763],PARAMETER["false_northing",22014.3572],UNIT["British chain (Sears 1922)",20.1167651215526],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","29871"]]

Read the full GeoServer guide →

How do I add EPSG:29871 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (29871, 'EPSG', 29871, '+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +to_meter=20.1167651215526 +no_defs +type=crs', 'PROJCS["Timbalai 1948 / RSO Borneo (ch)",GEOGCS["Timbalai 1948",DATUM["Timbalai_1948",SPHEROID["Everest 1830 (1967 Definition)",6377298.556,300.8017],TOWGS84[-679,669,-48,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4298"]],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",29352.4763],PARAMETER["false_northing",22014.3572],UNIT["British chain (Sears 1922)",20.1167651215526],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","29871"]]');

Read the full PostGIS guide →

How do I add EPSG:29871 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=omerc"
  "+lat_0=4"
  "+lonc=115"
  "+alpha=53.3158204722222"
  "+gamma=53.1301023611111"
  "+k=0.99984"
  "+x_0=590476.871463039"
  "+y_0=442857.65309436"
  "+ellps=evrstSS"
  "+towgs84=-679,669,-48,0,0,0,0"
  "+to_meter=20.1167651215526"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:29871 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:29871", "+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +to_meter=20.1167651215526 +no_defs +type=crs");

Read the full Proj4js guide →

Type

Projected

Unit

British chain (Sears 1922)

Geodetic CRS

Timbalai 1948

Datum

Timbalai 1948

Ellipsoid

Everest 1830 (1967 Definition)

Prime Meridian

Greenwich

Area of Use

Asia - Brunei and East Malaysia

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

Coordinate System

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

Center Coordinates

26351.72 23438.83

Projected Bounds

42363.35 -2098.1554567.99 4674.98

WGS84 Bounds

7.67 109.31119.61 0.85

Data Source

EPSG

Information Source

Defence Geographic Centre.

Revision Date

2022-11-29

Scope

Engineering survey, topographic mapping.

Remarks

Adopts ellipsoid metric conversion of 39.370147 inches per metre. Replaced by metric projection version (CRS code 29873). See also foot version (CRS code 29872) for Shell ops in E Malaysia.

EPSG

29871