EPSG:30494 · Algeria
Voirol 1879 / Sud Algerie (ancienne) to KML & KMZ
Voirol 1879 / Sud Algerie (ancienne) (EPSG:30494) is a Lambert Conformal Conic coordinate system on the Voirol 1879 datum, with coordinates in metres. Its official area of use is: Algeria - 35.6 grads to 38.5 grads North (32°N to 34°39'N).
- Converter already set to EPSG:30494
- Latitude and longitude on WGS 84, as Google Earth uses
- Download the point as KML
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Good to know
- Datum: Treated as WGS 84, no shift (the datums agree to about a metre or better).
Convert a whole spreadsheet
- Open the web app or the Windows app, and paste your rows from Excel or open a CSV file.
- Under Coordinate system, search for “30494” and pick Voirol 1879 / Sud Algerie (ancienne).
- Check one point you know on the map, then press Save KML or Save KMZ and open it in Google Earth.
Check points for EPSG:30494
Five points inside the area of use of Voirol 1879 / Sud Algerie (ancienne), with their latitude and longitude on WGS 84 and their easting and northing in this grid (metres). Enter an easting and northing in the converter above: you should get the latitude and longitude shown, to a few centimetres.
| Point | Latitude | Longitude | Easting | Northing |
|---|---|---|---|---|
| Middle of the area of use | 33.32500° N | 3.07000° E | 534,438.57 | 302,832.64 |
| Towards the north-west | 34.12600° N | 0.54200° W | 201,050.06 | 396,226.60 |
| Towards the north-east | 34.12600° N | 6.68200° E | 867,156.47 | 398,588.24 |
| Towards the south-west | 32.52400° N | 0.54200° W | 195,533.37 | 218,702.33 |
| Towards the south-east | 32.52400° N | 6.68200° E | 873,931.81 | 221,107.55 |
Common mistakes with Voirol 1879 / Sud Algerie (ancienne)
- Easting and northing swapped. In Voirol 1879 / Sud Algerie (ancienne) the middle of the grid is near easting 534,438.57 and northing 302,832.64. If your easting column holds numbers like 302,832.64, the columns are the wrong way round and every point lands far away: swap them before converting.
- Feet entered as metres. Voirol 1879 / Sud Algerie (ancienne) is in metres. Coordinates copied from a drawing in feet must be converted first, or every point moves outwards from the grid's origin.
- Forgetting the datum. Voirol 1879 / Sud Algerie (ancienne) is not on WGS 84: treated as WGS 84, no shift (the datums agree to about a metre or better). Picking a WGS 84 grid with the same projection instead leaves the points off by that amount.
- Points outside the grid's area. Voirol 1879 / Sud Algerie (ancienne) is meant for Algeria - 35.6 grads to 38.5 grads North (32°N to 34°39'N). Points well outside that area convert with growing error; the converter flags them so you can choose the right grid.
- A local site grid. If every point is off by the same distance and direction, the drawing may be on a local site grid. Calibrate on three or more known control points instead.
New to this? Read how to convert easting and northing to latitude and longitude.