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
Area of use
| West | -9.85° |
| South | 31.49° |
| East | -1.01° |
| North | 35.97° |
Projection parameters
| Projection | lcc |
| Standard parallel 1 | 33.3 |
| Latitude of origin | 33.3 |
| Central meridian | -5.4 |
| Scale factor | 0.999625769 |
| False easting | 500000 |
| False northing | 300000 |
| Ellipsoid | clrk80ign |
| Units | m |
| Helmert shift to WGS84 | 31,146,47,0,0,0,0 |
+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
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
- EPSG:4261 — Merchich
- EPSG:26192 — Merchich / Sud Maroc
- EPSG:26193 — Merchich / Sud Maroc (deg)
- EPSG:26194 — Merchich / Sahara Sud
- EPSG:26195 — Merchich / Sahara Sud
- EPSG:32628 — WGS 84 / UTM zone 28N
- EPSG:32629 — WGS 84 / UTM zone 29N
- EPSG:32630 — WGS 84 / UTM zone 30N
Useful links: Converter · Batch converter · File converter · Country page
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FAQ
- What is EPSG:26191?
- 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.
- 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 Morocco. This page shows its area of use as a coordinate rectangle above.
- How do I convert EPSG:26191 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.
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