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    EPSG reference

    EPSG:2318 — Ain el Abd / Aramco Lambert

    Ain el Abd / Aramco Lambert (EPSG:2318) — a Projected (metres) system on the intl datum, used in Saudi Arabia. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free conve…

    At a glance

    EPSG
    2318
    Name
    Ain el Abd / Aramco Lambert
    Kind
    Projected (metres)
    Family
    Lambert Conformal Conic
    Ellipsoid
    intl
    Accuracy
    ±0.1 m (vs PROJ)
    Countries
    Saudi Arabia
    Convert from this system now

    Area of use

    West34.51°
    South16.37°
    East55.67°
    North32.16°

    Projection parameters

    Projectionlcc
    Latitude of origin25.08951
    Central meridian48
    Standard parallel 117
    Standard parallel 233
    False easting0
    False northing0
    Ellipsoidintl
    Unitsm
    Helmert shift to WGS84-143,-236,7,0,0,0,0
    proj4
    +proj=lcc +lat_0=25.08951 +lon_0=48 +lat_1=17 +lat_2=33 +x_0=0 +y_0=0 +ellps=intl +units=m +no_defs +towgs84=-143,-236,7,0,0,0,0
    WKT (ESRI)
    PROJCS["Ain el Abd / Aramco Lambert",GEOGCS["GCS_Ain el Abd / Aramco Lambert",DATUM["D_International_1924",SPHEROID["International_1924",6378388,297],TOWGS84[-143,-236,7,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",48],PARAMETER["Standard_Parallel_1",17],PARAMETER["Standard_Parallel_2",33],PARAMETER["Latitude_Of_Origin",25.08951],UNIT["Meter",1],AUTHORITY["EPSG","2318"]]

    Sample conversion

    Saudi Arabia capital: WGS84 46.67530, 24.71360 → EPSG:2318 -132688.395, -40637.199

    Values are within ±0.1 m at the test point.

    About the Lambert Conformal Conic family

    Ain el Abd / Aramco Lambert uses the Lambert Conformal Conic projection — a cone-based, angle-preserving grid well suited to territories that stretch east–west, defined by one or two standard parallels. It is common for national mapping and for oil-and-gas grids across North Africa and Arabia.

    Scale is true along the standard parallel(s) and grows away from them; for precise distance work reduce ground distances to grid using the point scale factor. Confirm both standard parallels and the datum before trusting imported coordinates.

    Related systems

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    FAQ

    It is the coordinate system “Ain el Abd / Aramco Lambert”, a Projected (metres) system in the Lambert Conformal Conic family, identified worldwide by the code EPSG:2318.

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