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    EPSG reference

    EPSG:31901 — KUDAMS / KTM

    KUDAMS / KTM (EPSG:31901) — a Projected (metres) system on the GRS80 datum, used in Kuwait. Parameters, proj4, WKT, accuracy ±23.5 m, plus a free converter to WGS84 and…

    At a glance

    EPSG
    31901
    Name
    KUDAMS / KTM
    Kind
    Projected (metres)
    Family
    Transverse Mercator (belt)
    Ellipsoid
    GRS80
    Accuracy
    ±23.5 m (vs PROJ)
    Countries
    Kuwait
    Convert from this system now

    Area of use

    West47.78°
    South29.17°
    East48.16°
    North29.45°

    Projection parameters

    Projectiontmerc
    Latitude of origin0
    Central meridian48
    Scale factor1
    False easting500000
    False northing0
    EllipsoidGRS80
    Unitsm
    proj4
    +proj=tmerc +lat_0=0 +lon_0=48 +k=1 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs
    WKT (ESRI)
    PROJCS["KUDAMS / KTM",GEOGCS["GCS_KUDAMS / KTM",DATUM["D_GRS_1980",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",48],PARAMETER["Scale_Factor",1],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","31901"]]

    Sample conversion

    Kuwait capital: WGS84 47.97740, 29.37590 → EPSG:31901 497805.895, 3250933.869

    Values are within ±23.5 m at the test point.

    About the Transverse Mercator (belt) family

    KUDAMS / KTM 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 “KUDAMS / KTM”, a Projected (metres) system in the Transverse Mercator (belt) family, identified worldwide by the code EPSG:31901.

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