EPSG:8441 — Tananarive / Laborde Grid

Projected · Madagascar - onshore

Export Formats

OGC WKT

PROJCS[
    "Tananarive / Laborde Grid",
    GEOGCS[
        "Tananarive",
        DATUM[
            "Tananarive_1925",
            SPHEROID["International 1924",6378388,297],
            TOWGS84[-198.383,-240.517,-107.909,0,0,0,0]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4297"]
    ],
    PROJECTION["Laborde_Oblique_Mercator"],
    PARAMETER["latitude_of_center",-18.9],
    PARAMETER["longitude_of_center",46.4372291666667],
    PARAMETER["azimuth",18.9],
    PARAMETER["scale_factor",0.9995],
    PARAMETER["false_easting",400000],
    PARAMETER["false_northing",800000],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","8441"]
]

WKT2

PROJCRS[
    "Tananarive / Laborde Grid",
    BASEGEOGCRS[
        "Tananarive",
        DATUM[
            "Tananarive 1925",
            ELLIPSOID[
                "International 1924",
                6378388,
                297,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7022]
            ],
            ID["EPSG",6297]
        ],
        ID["EPSG",4297]
    ],
    CONVERSION[
        "Laborde Grid (Greenwich)",
        METHOD["Laborde Oblique Mercator",ID["EPSG",9813]],
        PARAMETER[
            "Latitude of projection centre",
            -18.9000000000003,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8811]
        ],
        PARAMETER[
            "Longitude of projection centre",
            46.437229166667,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8812]
        ],
        PARAMETER[
            "Azimuth at projection centre",
            18.9000000000003,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8813]
        ],
        PARAMETER[
            "Scale factor at projection centre",
            0.9995,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8815]
        ],
        PARAMETER[
            "False easting",
            400000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            800000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",8440]
    ],
    CS[Cartesian,2,ID["EPSG",4530]],
    AXIS["Northing (X)",north],
    AXIS["Easting (Y)",east],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",8441]
]

PROJ.4

+proj=labrd +lat_0=-18.9 +lon_0=46.4372291666667 +azi=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +towgs84=-198.383,-240.517,-107.909,0,0,0,0 +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:8441", "+proj=labrd +lat_0=-18.9 +lon_0=46.4372291666667 +azi=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +towgs84=-198.383,-240.517,-107.909,0,0,0,0 +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 8441,
  "name": "Tananarive / Laborde Grid",
  "kind": "projected",
  "area": "Madagascar - onshore",
  "unit": "metre",
  "bbox": [
    -25.64,
    43.18,
    -11.89,
    50.56
  ],
  "proj4": "+proj=labrd +lat_0=-18.9 +lon_0=46.4372291666667 +azi=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +towgs84=-198.383,-240.517,-107.909,0,0,0,0 +units=m +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 (8441, 'EPSG', 8441, '+proj=labrd +lat_0=-18.9 +lon_0=46.4372291666667 +azi=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +towgs84=-198.383,-240.517,-107.909,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Tananarive / Laborde Grid",GEOGCS["Tananarive",DATUM["Tananarive_1925",SPHEROID["International 1924",6378388,297],TOWGS84[-198.383,-240.517,-107.909,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4297"]],PROJECTION["Laborde_Oblique_Mercator"],PARAMETER["latitude_of_center",-18.9],PARAMETER["longitude_of_center",46.4372291666667],PARAMETER["azimuth",18.9],PARAMETER["scale_factor",0.9995],PARAMETER["false_easting",400000],PARAMETER["false_northing",800000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","8441"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=labrd"
  "+lat_0=-18.9"
  "+lon_0=46.4372291666667"
  "+azi=18.9"
  "+k=0.9995"
  "+x_0=400000"
  "+y_0=800000"
  "+ellps=intl"
  "+towgs84=-198.383,-240.517,-107.909,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

8441=PROJCS["Tananarive / Laborde Grid",GEOGCS["Tananarive",DATUM["Tananarive_1925",SPHEROID["International 1924",6378388,297],TOWGS84[-198.383,-240.517,-107.909,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4297"]],PROJECTION["Laborde_Oblique_Mercator"],PARAMETER["latitude_of_center",-18.9],PARAMETER["longitude_of_center",46.4372291666667],PARAMETER["azimuth",18.9],PARAMETER["scale_factor",0.9995],PARAMETER["false_easting",400000],PARAMETER["false_northing",800000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","8441"]]

Related Coordinate Systems

Available Transformations (3)

Transformations inherited from base CRS: EPSG:4297 (Tananarive)

Transformation	Source → Target	Accuracy (m)
Tananarive (Paris) to Tananarive (1)	4810 → 4297	0
Tananarive to WGS 84 (2)	4297 → 4326	3
Tananarive to WGS 84 (1)	4297 → 4326	999

Other CRS using Tananarive 1925

Frequently Asked Questions

How do I add EPSG:8441 to GeoServer?

Add the following definition to your GeoServer configuration:

8441=PROJCS["Tananarive / Laborde Grid",GEOGCS["Tananarive",DATUM["Tananarive_1925",SPHEROID["International 1924",6378388,297],TOWGS84[-198.383,-240.517,-107.909,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4297"]],PROJECTION["Laborde_Oblique_Mercator"],PARAMETER["latitude_of_center",-18.9],PARAMETER["longitude_of_center",46.4372291666667],PARAMETER["azimuth",18.9],PARAMETER["scale_factor",0.9995],PARAMETER["false_easting",400000],PARAMETER["false_northing",800000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","8441"]]

Read the full GeoServer guide →

How do I add EPSG:8441 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (8441, 'EPSG', 8441, '+proj=labrd +lat_0=-18.9 +lon_0=46.4372291666667 +azi=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +towgs84=-198.383,-240.517,-107.909,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Tananarive / Laborde Grid",GEOGCS["Tananarive",DATUM["Tananarive_1925",SPHEROID["International 1924",6378388,297],TOWGS84[-198.383,-240.517,-107.909,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4297"]],PROJECTION["Laborde_Oblique_Mercator"],PARAMETER["latitude_of_center",-18.9],PARAMETER["longitude_of_center",46.4372291666667],PARAMETER["azimuth",18.9],PARAMETER["scale_factor",0.9995],PARAMETER["false_easting",400000],PARAMETER["false_northing",800000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","8441"]]');

Read the full PostGIS guide →

How do I add EPSG:8441 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=labrd"
  "+lat_0=-18.9"
  "+lon_0=46.4372291666667"
  "+azi=18.9"
  "+k=0.9995"
  "+x_0=400000"
  "+y_0=800000"
  "+ellps=intl"
  "+towgs84=-198.383,-240.517,-107.909,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:8441 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:8441", "+proj=labrd +lat_0=-18.9 +lon_0=46.4372291666667 +azi=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +towgs84=-198.383,-240.517,-107.909,0,0,0,0 +units=m +no_defs +type=crs");

Read the full Proj4js guide →