EPSG:2318 — Ain el Abd / Aramco Lambert
Ain el Abd / Aramco Lambert (EPSG:2318) — a Projected (metres) system on the intl datum, used in Saudi Arabia. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free conve…
At a glance
- EPSG
- 2318
- Name
- Ain el Abd / Aramco Lambert
- Kind
- Projected (metres)
- Family
- Lambert Conformal Conic
- Ellipsoid
- intl
- Accuracy
- ±0.1 m (vs PROJ)
- Countries
- Saudi Arabia
Area of use
| West | 34.51° |
| South | 16.37° |
| East | 55.67° |
| North | 32.16° |
Projection parameters
| Projection | lcc |
| Latitude of origin | 25.08951 |
| Central meridian | 48 |
| Standard parallel 1 | 17 |
| Standard parallel 2 | 33 |
| False easting | 0 |
| False northing | 0 |
| Ellipsoid | intl |
| Units | m |
| Helmert shift to WGS84 | -143,-236,7,0,0,0,0 |
+proj=lcc +lat_0=25.08951 +lon_0=48 +lat_1=17 +lat_2=33 +x_0=0 +y_0=0 +ellps=intl +units=m +no_defs +towgs84=-143,-236,7,0,0,0,0
PROJCS["Ain el Abd / Aramco Lambert",GEOGCS["GCS_Ain el Abd / Aramco Lambert",DATUM["D_International_1924",SPHEROID["International_1924",6378388,297],TOWGS84[-143,-236,7,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",48],PARAMETER["Standard_Parallel_1",17],PARAMETER["Standard_Parallel_2",33],PARAMETER["Latitude_Of_Origin",25.08951],UNIT["Meter",1],AUTHORITY["EPSG","2318"]]
Sample conversion
Saudi Arabia capital: WGS84 46.67530, 24.71360 → EPSG:2318 -132688.395, -40637.199
Values are within ±0.1 m at the test point.
About the Lambert Conformal Conic family
Ain el Abd / Aramco Lambert 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:4204 — Ain el Abd
- EPSG:8818 — MTRF-2000
- EPSG:8836 — MTRF-2000 / UTM zone 36N
- EPSG:8837 — MTRF-2000 / UTM zone 37N
- EPSG:8838 — MTRF-2000 / UTM zone 38N
- EPSG:8839 — MTRF-2000 / UTM zone 39N
- EPSG:32636 — WGS 84 / UTM zone 36N
- EPSG:32637 — WGS 84 / UTM zone 37N
- EPSG:32638 — WGS 84 / UTM zone 38N
- EPSG:32639 — WGS 84 / UTM zone 39N
Useful links: Converter · Batch converter · File converter · Country page
Request technical support
FAQ
- What is EPSG:2318?
- It is the coordinate system “Ain el Abd / Aramco Lambert”, a Projected (metres) system in the Lambert Conformal Conic family, identified worldwide by the code EPSG:2318.
- What datum does it use, and how accurate is it?
- It is based on the intl 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 Saudi Arabia. This page shows its area of use as a coordinate rectangle above.
- How do I convert EPSG:2318 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