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    EPSG reference

    EPSG:2088 — Carthage / TM 6

    Carthage / TM 6 (EPSG:2088) — a Projected (metres) system on the clrk80ign datum, used in Tunisia. Parameters, proj4, WKT, accuracy ±1.2 m, plus a free converter to WGS8…

    At a glance

    EPSG
    2088
    Name
    Carthage / TM 6
    Kind
    Projected (metres)
    Family
    Transverse Mercator (belt)
    Ellipsoid
    clrk80ign
    Accuracy
    ±1.2 m (vs PROJ)
    Countries
    Tunisia
    Convert from this system now

    Area of use

    West7.81°
    South33.22°
    East13.67°
    North38.41°

    Projection parameters

    Projectiontmerc
    Latitude of origin0
    Central meridian11
    Scale factor0.9996
    False easting500000
    False northing0
    Ellipsoidclrk80ign
    Unitsm
    Helmert shift to WGS84-263,6,431,0,0,0,0
    proj4
    +proj=tmerc +lat_0=0 +lon_0=11 +k=0.9996 +x_0=500000 +y_0=0 +ellps=clrk80ign +units=m +no_defs +towgs84=-263,6,431,0,0,0,0
    WKT (ESRI)
    PROJCS["Carthage / TM 6",GEOGCS["GCS_Carthage / TM 6",DATUM["D_Clarke_1880_IGN",SPHEROID["Clarke_1880_IGN",6378249.2,293.4660212936269],TOWGS84[-263,6,431,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",11],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","2088"]]

    Sample conversion

    Tunisia capital: WGS84 10.18150, 36.80650 → EPSG:2088 426931.752, 4073264.408

    Values are within ±1.2 m at the test point.

    About the Transverse Mercator (belt) family

    Carthage / TM 6 is a Transverse Mercator belt — a national or cadastral grid in metres, conformal (angles are preserved), with its own central meridian and scale factor. Egypt's Red/Purple/Blue belts, the Levant grids, and many Gulf cadastral systems are of this kind.

    Two things decide whether your coordinates land correctly: the exact belt (central meridian) and the datum. Mixing a coordinate from one belt into another, or ignoring the datum shift to WGS 84, is the usual cause of a systematic offset in imported survey data.

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    FAQ

    It is the coordinate system “Carthage / TM 6”, a Projected (metres) system in the Transverse Mercator (belt) family, identified worldwide by the code EPSG:2088.

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