EPSG:9360 — KSA-GRF17 / UTM zone 40N
KSA-GRF17 / UTM zone 40N (EPSG:9360) — a Projected (metres) system on the GRS80 datum, used in Saudi Arabia. Parameters, proj4, WKT, accuracy ±0.3 m, plus a free convert…
At a glance
- EPSG
- 9360
- Name
- KSA-GRF17 / UTM zone 40N
- Kind
- Projected (metres)
- Family
- Universal Transverse Mercator (UTM)
- Ellipsoid
- GRS80
- Accuracy
- ±0.3 m (vs PROJ)
- Countries
- Saudi Arabia
Area of use
| West | 54.00° |
| South | 19.66° |
| East | 55.67° |
| North | 22.77° |
Projection parameters
| Projection | utm |
| UTM zone | 40 |
| Ellipsoid | GRS80 |
| Units | m |
+proj=utm +zone=40 +ellps=GRS80 +units=m +no_defs
PROJCS["KSA-GRF17 / UTM zone 40N",GEOGCS["GCS_KSA-GRF17 / UTM zone 40N",DATUM["D_GRS_1980",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",57],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0],UNIT["Meter",1],AUTHORITY["EPSG","9360"]]
Sample conversion
Centre of the area of use: WGS84 54.83500, 21.21500 → EPSG:9360 275278.168, 2347479.476
Values are within ±0.3 m at the test point.
About the Universal Transverse Mercator (UTM) family
KSA-GRF17 / UTM zone 40N is a Universal Transverse Mercator zone — a 6°-wide belt of the worldwide UTM system, in metres, centred on a meridian carefully chosen so distortion stays low across the zone. It is the everyday working grid for GPS-derived surveying in Saudi Arabia.
The classic field mistake with UTM is using the wrong zone: a point one zone away is easily hundreds of kilometres off. Always confirm the zone number (and the hemisphere) before importing coordinates, and remember that UTM eastings are offset by a 500 km false easting so they never go negative.
Related systems
- EPSG:2318 — Ain el Abd / Aramco Lambert
- 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: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
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