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    EPSG reference

    EPSG:2069 — LD79 / Libya zone 7

    LD79 / Libya zone 7 (EPSG:2069) — a Projected (metres) system on the intl datum, used in Libya. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to WGS84 a…

    At a glance

    EPSG
    2069
    Name
    LD79 / Libya zone 7
    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 factor0.9999
    False easting200000
    False northing0
    Ellipsoidintl
    Unitsm
    Helmert shift to WGS84-115.8543,-99.0583,-152.4616,0,0,0,0
    proj4
    +proj=tmerc +lat_0=0 +lon_0=11 +k=0.9999 +x_0=200000 +y_0=0 +ellps=intl +units=m +no_defs +towgs84=-115.8543,-99.0583,-152.4616,0,0,0,0
    WKT (ESRI)
    PROJCS["LD79 / Libya zone 7",GEOGCS["GCS_LD79 / Libya zone 7",DATUM["D_International_1924",SPHEROID["International_1924",6378388,297],TOWGS84[-115.8543,-99.0583,-152.4616,0,0,0,0]],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",0.9999],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","2069"]]

    Sample conversion

    Centre of the area of use: WGS84 11.00000, 28.37000 → EPSG:2069 200075.125, 3139323.992

    Values are within ±0.1 m at the test point.

    About the Transverse Mercator (belt) family

    LD79 / Libya zone 7 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

    It is the coordinate system “LD79 / Libya zone 7”, a Projected (metres) system in the Transverse Mercator (belt) family, identified worldwide by the code EPSG:2069.

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