Skip to main content
    GeoGiza
    Sign in
    EPSG reference

    EPSG:9294 — ONGD17

    ONGD17 (EPSG:9294) — a Geographic (degrees) system on the GRS80 datum, used in Oman. Parameters, proj4, WKT, accuracy ±1.4 m, plus a free converter to WGS84 and UTM.

    At a glance

    EPSG
    9294
    Name
    ONGD17
    Kind
    Geographic (degrees)
    Family
    Geographic (longitude/latitude)
    Ellipsoid
    GRS80
    Accuracy
    ±1.4 m (vs PROJ)
    Countries
    Oman
    Convert from this system now

    Area of use

    West51.99°
    South14.33°
    East63.38°
    North26.74°

    Projection parameters

    Projectionlonglat
    EllipsoidGRS80
    proj4
    +proj=longlat +ellps=GRS80 +no_defs
    WKT (ESRI)
    GEOGCS["GCS_ONGD17",DATUM["D_GRS_1980",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","9294"]]

    Sample conversion

    Oman capital: WGS84 58.59220, 23.61390 → EPSG:9294 58.5922000, 23.6139000

    Values are within ±1.4 m at the test point.

    About the Geographic (longitude/latitude) family

    ONGD17 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

    Request technical support

    Need help with your survey project?

    Leave your email and our technical office will reach out for certified conversion and geodetic-adjustment support. The tool stays free, no sign-up.

    FAQ

    What is EPSG:9294?
    It is the coordinate system “ONGD17”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:9294.
    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 ±1.4 m versus PROJ; for centimetre work use a geodetic adjustment service.
    Where is this system used?
    It is used in Oman. This page shows its area of use as a coordinate rectangle above.
    How do I convert EPSG:9294 to WGS84?
    Use the free coordinate converter above (preloaded with this system) to convert to WGS84, UTM, or any other system, within a ±1.4 m residual.

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