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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

    What is EPSG:31901?
    It is the coordinate system “KUDAMS / KTM”, a Projected (metres) system in the Transverse Mercator (belt) family, identified worldwide by the code EPSG:31901.
    What datum does it use, and how accurate is it?
    It is based on the GRS80 ellipsoid with no default transform to WGS84 (ballpark). The residual at the test point is about ±23.5 m versus PROJ; for centimetre work use a geodetic adjustment service.
    Where is this system used?
    It is used in Kuwait. This page shows its area of use as a coordinate rectangle above.
    How do I convert EPSG:31901 to WGS84?
    Use the free coordinate converter above (preloaded with this system) to convert to WGS84, UTM, or any other system, within a ±23.5 m residual.

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