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    EPSG reference

    EPSG:26191 — Merchich / Nord Maroc

    Merchich / Nord Maroc (EPSG:26191) — a Projected (metres) system on the clrk80ign datum, used in Morocco. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter…

    At a glance

    EPSG
    26191
    Name
    Merchich / Nord Maroc
    Kind
    Projected (metres)
    Family
    Lambert Conformal Conic
    Ellipsoid
    clrk80ign
    Accuracy
    ±0.1 m (vs PROJ)
    Countries
    Morocco
    Convert from this system now

    Area of use

    West-9.85°
    South31.49°
    East-1.01°
    North35.97°

    Projection parameters

    Projectionlcc
    Standard parallel 133.3
    Latitude of origin33.3
    Central meridian-5.4
    Scale factor0.999625769
    False easting500000
    False northing300000
    Ellipsoidclrk80ign
    Unitsm
    Helmert shift to WGS8431,146,47,0,0,0,0
    proj4
    +proj=lcc +lat_1=33.3 +lat_0=33.3 +lon_0=-5.4 +k_0=0.999625769 +x_0=500000 +y_0=300000 +ellps=clrk80ign +units=m +no_defs +towgs84=31,146,47,0,0,0,0
    WKT (ESRI)
    PROJCS["Merchich / Nord Maroc",GEOGCS["GCS_Merchich / Nord Maroc",DATUM["D_Clarke_1880_IGN",SPHEROID["Clarke_1880_IGN",6378249.2,293.4660212936269],TOWGS84[31,146,47,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",500000],PARAMETER["False_Northing",300000],PARAMETER["Central_Meridian",-5.4],PARAMETER["Standard_Parallel_1",33.3],PARAMETER["Scale_Factor",0.999625769],PARAMETER["Latitude_Of_Origin",33.3],UNIT["Meter",1],AUTHORITY["EPSG","26191"]]

    Sample conversion

    Morocco capital: WGS84 -6.84160, 34.02090 → EPSG:26191 366745.086, 381141.992

    Values are within ±0.1 m at the test point.

    About the Lambert Conformal Conic family

    Merchich / Nord Maroc uses the Lambert Conformal Conic projection — a cone-based, angle-preserving grid well suited to territories that stretch east–west, defined by one or two standard parallels. It is common for national mapping and for oil-and-gas grids across North Africa and Arabia.

    Scale is true along the standard parallel(s) and grows away from them; for precise distance work reduce ground distances to grid using the point scale factor. Confirm both standard parallels and the datum before trusting imported coordinates.

    Related systems

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    FAQ

    It is the coordinate system “Merchich / Nord Maroc”, a Projected (metres) system in the Lambert Conformal Conic family, identified worldwide by the code EPSG:26191.

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