EPSG:29702 — Tananarive (Paris) / Laborde Grid approximation

Projected · Madagascar - onshore

Export Formats

WKT2

PROJCRS[
    "Tananarive (Paris) / Laborde Grid approximation",
    BASEGEOGCRS[
        "Tananarive (Paris)",
        DATUM[
            "Tananarive 1925 (Paris)",
            ELLIPSOID[
                "International 1924",
                6378388,
                297,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7022]
            ],
            ID["EPSG",6810]
        ],
        PRIMEM[
            "Paris",
            0.040792344,
            ANGLEUNIT["radian",1,ID["EPSG",9101]],
            ID["EPSG",8903]
        ],
        ID["EPSG",4810]
    ],
    CONVERSION[
        "Laborde Grid approximation",
        METHOD["Hotine Oblique Mercator (variant B)",ID["EPSG",9815]],
        PARAMETER[
            "Latitude of projection centre",
            -21,
            ANGLEUNIT["grad",0.015707963267949,ID["EPSG",9105]],
            ID["EPSG",8811]
        ],
        PARAMETER[
            "Longitude of projection centre",
            49,
            ANGLEUNIT["grad",0.015707963267949,ID["EPSG",9105]],
            ID["EPSG",8812]
        ],
        PARAMETER[
            "Azimuth at projection centre",
            21,
            ANGLEUNIT["grad",0.015707963267949,ID["EPSG",9105]],
            ID["EPSG",8813]
        ],
        PARAMETER[
            "Angle from Rectified to Skew Grid",
            21,
            ANGLEUNIT["grad",0.015707963267949,ID["EPSG",9105]],
            ID["EPSG",8814]
        ],
        PARAMETER[
            "Scale factor at projection centre",
            0.9995,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8815]
        ],
        PARAMETER[
            "Easting at projection centre",
            400000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8816]
        ],
        PARAMETER[
            "Northing at projection centre",
            800000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8817]
        ],
        ID["EPSG",19911]
    ],
    CS[Cartesian,2,ID["EPSG",4530]],
    AXIS["Northing (X)",north],
    AXIS["Easting (Y)",east],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",29702]
]

PROJ.4

+proj=omerc +lat_0=-18.9 +lonc=44.1 +alpha=18.9 +gamma=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +pm=paris +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:29702", "+proj=omerc +lat_0=-18.9 +lonc=44.1 +alpha=18.9 +gamma=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +pm=paris +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 29702,
  "name": "Tananarive (Paris) / Laborde Grid approximation",
  "kind": "projected",
  "area": "Madagascar - onshore",
  "unit": "metre",
  "bbox": [
    -25.64,
    43.18,
    -11.89,
    50.56
  ],
  "proj4": "+proj=omerc +lat_0=-18.9 +lonc=44.1 +alpha=18.9 +gamma=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +pm=paris +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 (29702, 'EPSG', 29702, '+proj=omerc +lat_0=-18.9 +lonc=44.1 +alpha=18.9 +gamma=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +pm=paris +units=m +no_defs +type=crs', '');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=omerc"
  "+lat_0=-18.9"
  "+lonc=44.1"
  "+alpha=18.9"
  "+gamma=18.9"
  "+k=0.9995"
  "+x_0=400000"
  "+y_0=800000"
  "+ellps=intl"
  "+pm=paris"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Related Coordinate Systems

Available Transformations (3)

Transformations inherited from base CRS: EPSG:4810 (Tananarive (Paris))

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

Other CRS using Tananarive 1925 (Paris)

Frequently Asked Questions

How do I add EPSG:29702 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (29702, 'EPSG', 29702, '+proj=omerc +lat_0=-18.9 +lonc=44.1 +alpha=18.9 +gamma=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +pm=paris +units=m +no_defs +type=crs', '');

Read the full PostGIS guide →

How do I add EPSG:29702 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=omerc"
  "+lat_0=-18.9"
  "+lonc=44.1"
  "+alpha=18.9"
  "+gamma=18.9"
  "+k=0.9995"
  "+x_0=400000"
  "+y_0=800000"
  "+ellps=intl"
  "+pm=paris"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:29702 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:29702", "+proj=omerc +lat_0=-18.9 +lonc=44.1 +alpha=18.9 +gamma=18.9 +k=0.9995 +x_0=400000 +y_0=800000 +ellps=intl +pm=paris +units=m +no_defs +type=crs");

Read the full Proj4js guide →