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    EPSG reference

    EPSG:4754 — Libyan Datum 1979 (LD79)

    Libyan Datum 1979 (LD79) (EPSG:4754) — a Geographic (degrees) system on the intl datum, used in Libya. Parameters, proj4, WKT, accuracy ±50.9 m, plus a free converter to…

    At a glance

    EPSG
    4754
    Name
    Libyan Datum 1979 (LD79)
    Kind
    Geographic (degrees)
    Family
    Geographic (longitude/latitude)
    Ellipsoid
    intl
    Accuracy
    ±50.9 m (vs PROJ)
    Countries
    Libya
    Convert from this system now

    Area of use

    West9.31°
    South19.50°
    East26.21°
    North35.23°

    Projection parameters

    Projectionlonglat
    Ellipsoidintl
    proj4
    +proj=longlat +ellps=intl +no_defs
    WKT (ESRI)
    GEOGCS["GCS_Libyan Datum 1979 (LD79)",DATUM["D_International_1924",SPHEROID["International_1924",6378388,297]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4754"]]

    Sample conversion

    Libya capital: WGS84 13.19130, 32.88720 → EPSG:4754 13.1913000, 32.8872000

    Values are within ±50.9 m at the test point.

    About the Geographic (longitude/latitude) family

    Libyan Datum 1979 (LD79) is a geographic coordinate system: positions are longitude and latitude in degrees on its reference ellipsoid, not metres on a plane. It is the datum layer that projected grids (UTM, national belts) are built upon.

    Because it is unprojected, distances and areas cannot be measured directly from its degrees — convert to a metric projected system (or use a geodesic calculation) first. This page's converter does exactly that.

    Related systems

    Useful links: Converter · Batch converter · File converter · Country page

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    FAQ

    What is EPSG:4754?
    It is the coordinate system “Libyan Datum 1979 (LD79)”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:4754.
    What datum does it use, and how accurate is it?
    It is based on the intl ellipsoid with no default transform to WGS84 (ballpark). The residual at the test point is about ±50.9 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:4754 to WGS84?
    Use the free coordinate converter above (preloaded with this system) to convert to WGS84, UTM, or any other system, within a ±50.9 m residual.

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