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    EPSG reference

    EPSG:3191 — LGD2006 / Libya TM zone 6

    LGD2006 / Libya TM zone 6 (EPSG:3191) — a Projected (metres) system on the intl datum, used in Libya. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to W…

    At a glance

    EPSG
    3191
    Name
    LGD2006 / Libya TM zone 6
    Kind
    Projected (metres)
    Family
    Transverse Mercator (belt)
    Ellipsoid
    intl
    Accuracy
    ±0.1 m (vs PROJ)
    Countries
    Libya
    Convert from this system now

    Area of use

    West10.00°
    South23.51°
    East12.00°
    North33.23°

    Projection parameters

    Projectiontmerc
    Latitude of origin0
    Central meridian11
    Scale factor0.99995
    False easting200000
    False northing0
    Ellipsoidintl
    Unitsm
    Helmert shift to WGS84-208.4058,-109.8777,-2.5764,0,0,0,0
    proj4
    +proj=tmerc +lat_0=0 +lon_0=11 +k=0.99995 +x_0=200000 +y_0=0 +ellps=intl +units=m +no_defs +towgs84=-208.4058,-109.8777,-2.5764,0,0,0,0
    WKT (ESRI)
    PROJCS["LGD2006 / Libya TM zone 6",GEOGCS["GCS_LGD2006 / Libya TM zone 6",DATUM["D_International_1924",SPHEROID["International_1924",6378388,297],TOWGS84[-208.4058,-109.8777,-2.5764,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",200000],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",11],PARAMETER["Scale_Factor",0.99995],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","3191"]]

    Sample conversion

    Centre of the area of use: WGS84 11.00000, 28.37000 → EPSG:3191 200068.090, 3139304.948

    Values are within ±0.1 m at the test point.

    About the Transverse Mercator (belt) family

    LGD2006 / Libya TM zone 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.

    Related systems

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    FAQ

    What is EPSG:3191?
    It is the coordinate system “LGD2006 / Libya TM zone 6”, a Projected (metres) system in the Transverse Mercator (belt) family, identified worldwide by the code EPSG:3191.
    What datum does it use, and how accurate is it?
    It is based on the intl ellipsoid and it carries Helmert parameters to WGS84. The residual at the test point is about ±0.1 m versus PROJ; for centimetre work use a geodetic adjustment service.
    Where is this system used?
    It is used in Libya. This page shows its area of use as a coordinate rectangle above.
    How do I convert EPSG:3191 to WGS84?
    Use the free coordinate converter above (preloaded with this system) to convert to WGS84, UTM, or any other system, within a ±0.1 m residual.

    You may also need: Arab-world coordinate converter · Surveying file format converter · Batch coordinate file converter