EPSG:4318 — NGN
NGN (EPSG:4318) — a Geographic (degrees) system on the WGS84 datum, used in Kuwait. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free converter to WGS84 and UTM.
At a glance
- EPSG
- 4318
- Name
- NGN
- Kind
- Geographic (degrees)
- Family
- Geographic (longitude/latitude)
- Ellipsoid
- WGS84
- Accuracy
- ±0.1 m (vs PROJ)
- Countries
- Kuwait
Area of use
| West | 46.54° |
| South | 28.53° |
| East | 48.48° |
| North | 30.09° |
Projection parameters
| Projection | longlat |
| Ellipsoid | WGS84 |
| Helmert shift to WGS84 | -3.2,-5.7,2.8,0,0,0,0 |
+proj=longlat +ellps=WGS84 +no_defs +towgs84=-3.2,-5.7,2.8,0,0,0,0
GEOGCS["GCS_NGN",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563],TOWGS84[-3.2,-5.7,2.8,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4318"]]
Sample conversion
Kuwait capital: WGS84 47.97740, 29.37590 → EPSG:4318 47.9774148, 29.3758498
Values are within ±0.1 m at the test point.
About the Geographic (longitude/latitude) family
NGN 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
- EPSG:4246 — KOC (Clarke 1880 RGS variant)
- EPSG:4319 — KOC
- EPSG:24600 — KOC Lambert
- EPSG:31838 — NGN / UTM zone 38N
- EPSG:31839 — NGN / UTM zone 39N
- EPSG:31901 — KUDAMS / KTM
- EPSG:32638 — WGS 84 / UTM zone 38N
- EPSG:32639 — WGS 84 / UTM zone 39N
Useful links: Converter · Batch converter · File converter · Country page
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FAQ
- What is EPSG:4318?
- It is the coordinate system “NGN”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:4318.
- What datum does it use, and how accurate is it?
- It is based on the WGS84 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 Kuwait. This page shows its area of use as a coordinate rectangle above.
- How do I convert EPSG:4318 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