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    EPSG reference

    EPSG:4262 — Massawa

    Massawa (EPSG:4262) — a Geographic (degrees) system on the bessel datum, used in Sudan. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to WGS84 and UTM.

    At a glance

    EPSG
    4262
    Name
    Massawa
    Kind
    Geographic (degrees)
    Family
    Geographic (longitude/latitude)
    Ellipsoid
    bessel
    Accuracy
    ±0.1 m (vs PROJ)
    Countries
    Sudan
    Convert from this system now

    Area of use

    West36.44°
    South12.36°
    East43.31°
    North18.10°

    Projection parameters

    Projectionlonglat
    Ellipsoidbessel
    Helmert shift to WGS84639,405,60,0,0,0,0
    proj4
    +proj=longlat +ellps=bessel +no_defs +towgs84=639,405,60,0,0,0,0
    WKT (ESRI)
    GEOGCS["GCS_Massawa",DATUM["D_Bessel_1841",SPHEROID["Bessel_1841",6377397.155,299.1528128],TOWGS84[639,405,60,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4262"]]

    Sample conversion

    Centre of the area of use: WGS84 39.87500, 15.23000 → EPSG:4262 39.8759203, 15.2309538

    Values are within ±0.1 m at the test point.

    About the Geographic (longitude/latitude) family

    Massawa 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:4262?
    It is the coordinate system “Massawa”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:4262.
    What datum does it use, and how accurate is it?
    It is based on the bessel 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 Sudan. This page shows its area of use as a coordinate rectangle above.
    How do I convert EPSG:4262 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