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    EPSG reference

    EPSG:9333 — KSA-GRF17

    KSA-GRF17 (EPSG:9333) — a Geographic (degrees) system on the GRS80 datum, used in Saudi Arabia. Parameters, proj4, WKT, accuracy ±0.3 m, plus a free converter to WGS84 a…

    At a glance

    EPSG
    9333
    Name
    KSA-GRF17
    Kind
    Geographic (degrees)
    Family
    Geographic (longitude/latitude)
    Ellipsoid
    GRS80
    Accuracy
    ±0.3 m (vs PROJ)
    Countries
    Saudi Arabia
    Convert from this system now

    Area of use

    West34.44°
    South16.29°
    East55.67°
    North32.16°

    Projection parameters

    Projectionlonglat
    EllipsoidGRS80
    proj4
    +proj=longlat +ellps=GRS80 +no_defs
    WKT (ESRI)
    GEOGCS["GCS_KSA-GRF17",DATUM["D_GRS_1980",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","9333"]]

    Sample conversion

    Saudi Arabia capital: WGS84 46.67530, 24.71360 → EPSG:9333 46.6753000, 24.7136000

    Values are within ±0.3 m at the test point.

    About the Geographic (longitude/latitude) family

    KSA-GRF17 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:9333?
    It is the coordinate system “KSA-GRF17”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:9333.
    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 ±0.3 m versus PROJ; for centimetre work use a geodetic adjustment service.
    Where is this system used?
    It is used in Saudi Arabia. This page shows its area of use as a coordinate rectangle above.
    How do I convert EPSG:9333 to WGS84?
    Use the free coordinate converter above (preloaded with this system) to convert to WGS84, UTM, or any other system, within a ±0.3 m residual.

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