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    EPSG reference

    EPSG:4227 — Deir ez Zor

    Deir ez Zor (EPSG:4227) — a Geographic (degrees) system on the clrk80ign datum, used in Syria, Lebanon. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to…

    At a glance

    EPSG
    4227
    Name
    Deir ez Zor
    Kind
    Geographic (degrees)
    Family
    Geographic (longitude/latitude)
    Ellipsoid
    clrk80ign
    Accuracy
    ±0.1 m (vs PROJ)
    Countries
    Syria، Lebanon
    Convert from this system now

    Area of use

    West35.04°
    South32.31°
    East42.38°
    North37.30°

    Projection parameters

    Projectionlonglat
    Ellipsoidclrk80ign
    Helmert shift to WGS84-190.421,8.532,238.69,0,0,0,0
    proj4
    +proj=longlat +ellps=clrk80ign +no_defs +towgs84=-190.421,8.532,238.69,0,0,0,0
    WKT (ESRI)
    GEOGCS["GCS_Deir ez Zor",DATUM["D_Clarke_1880_IGN",SPHEROID["Clarke_1880_IGN",6378249.2,293.4660212936269],TOWGS84[-190.421,8.532,238.69,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4227"]]

    Sample conversion

    Syria capital: WGS84 36.27650, 33.51380 → EPSG:4227 36.2752133, 33.5141642

    Values are within ±0.1 m at the test point.

    About the Geographic (longitude/latitude) family

    Deir ez Zor 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:4227?
    It is the coordinate system “Deir ez Zor”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:4227.
    What datum does it use, and how accurate is it?
    It is based on the clrk80ign ellipsoid and it carries Helmert parameters to WGS84. The residual at the test point is about ±0.1 m versus PROJ; for centimetre work use a geodetic adjustment service.
    Where is this system used?
    It is used in Syria, Lebanon. This page shows its area of use as a coordinate rectangle above.
    How do I convert EPSG:4227 to WGS84?
    Use the free coordinate converter above (preloaded with this system) to convert to WGS84, UTM, or any other system, within a ±0.1 m residual.

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