EPSG:4713 — Ayabelle Lighthouse
Ayabelle Lighthouse (EPSG:4713) — a Geographic (degrees) system on the a=6378249.145 datum, used in Somalia. Parameters, proj4, WKT, accuracy ±0.1 m, plus a free convert…
At a glance
- EPSG
- 4713
- Name
- Ayabelle Lighthouse
- Kind
- Geographic (degrees)
- Family
- Geographic (longitude/latitude)
- Ellipsoid
- a=6378249.145
- Accuracy
- ±0.1 m (vs PROJ)
- Countries
- Somalia
Area of use
| West | 41.75° |
| South | 10.94° |
| East | 44.15° |
| North | 12.72° |
Projection parameters
| Projection | longlat |
| Semi-major axis | 6378249.145 |
| Inverse flattening | 293.465 |
| Helmert shift to WGS84 | -77,-128,142,0,0,0,0 |
+proj=longlat +a=6378249.145 +rf=293.465 +no_defs +towgs84=-77,-128,142,0,0,0,0
GEOGCS["GCS_Ayabelle Lighthouse",DATUM["D_Custom_6378249.145",SPHEROID["Custom_6378249.145",6378249.145,293.465],TOWGS84[-77,-128,142,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG","4713"]]
Sample conversion
Centre of the area of use: WGS84 42.95000, 11.83000 → EPSG:4713 42.9503783, 11.8297418
Values are within ±0.1 m at the test point.
About the Geographic (longitude/latitude) family
Ayabelle Lighthouse 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:4205 — Afgooye
- EPSG:20538 — Afgooye / UTM zone 38N
- EPSG:20539 — Afgooye / UTM zone 39N
- 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:4713?
- It is the coordinate system “Ayabelle Lighthouse”, a Geographic (degrees) system in the Geographic (longitude/latitude) family, identified worldwide by the code EPSG:4713.
- What datum does it use, and how accurate is it?
- It is based on the a=6378249.145 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 Somalia. This page shows its area of use as a coordinate rectangle above.
- How do I convert EPSG:4713 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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