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    EPSG reference

    EPSG:9359 — KSA-GRF17 / UTM zone 39N

    KSA-GRF17 / UTM zone 39N (EPSG:9359) — a Projected (metres) system on the GRS80 datum, used in Saudi Arabia. Parameters, proj4, WKT, accuracy ±0.3 m, plus a free convert…

    At a glance

    EPSG
    9359
    Name
    KSA-GRF17 / UTM zone 39N
    Kind
    Projected (metres)
    Family
    Universal Transverse Mercator (UTM)
    Ellipsoid
    GRS80
    Accuracy
    ±0.3 m (vs PROJ)
    Countries
    Saudi Arabia
    Convert from this system now

    Area of use

    West47.99°
    South17.94°
    East54.01°
    North28.94°

    Projection parameters

    Projectionutm
    UTM zone39
    EllipsoidGRS80
    Unitsm
    proj4
    +proj=utm +zone=39 +ellps=GRS80 +units=m +no_defs
    WKT (ESRI)
    PROJCS["KSA-GRF17 / UTM zone 39N",GEOGCS["GCS_KSA-GRF17 / UTM zone 39N",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",51],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","9359"]]

    Sample conversion

    Centre of the area of use: WGS84 51.00000, 23.44000 → EPSG:9359 500000.000, 2592228.996

    Values are within ±0.3 m at the test point.

    About the Universal Transverse Mercator (UTM) family

    KSA-GRF17 / UTM zone 39N is a Universal Transverse Mercator zone — a 6°-wide belt of the worldwide UTM system, in metres, centred on a meridian carefully chosen so distortion stays low across the zone. It is the everyday working grid for GPS-derived surveying in Saudi Arabia.

    The classic field mistake with UTM is using the wrong zone: a point one zone away is easily hundreds of kilometres off. Always confirm the zone number (and the hemisphere) before importing coordinates, and remember that UTM eastings are offset by a 500 km false easting so they never go negative.

    Related systems

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    FAQ

    It is the coordinate system “KSA-GRF17 / UTM zone 39N”, a Projected (metres) system in the Universal Transverse Mercator (UTM) family, identified worldwide by the code EPSG:9359.

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