ESRI:102583 · France
NTF France III (degrees) to KML & KMZ
NTF France III (degrees) (ESRI:102583) is a Lambert Conformal Conic coordinate system on the NTF France III (degrees) datum, with coordinates in metres. Its official area of use is: France - mainland south of 45.45~N.
- Converter already set to ESRI:102583
- Latitude and longitude on WGS 84, as Google Earth uses
- Download the point as KML
Loading converter…
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 “102583” and pick NTF France III (degrees).
- Check one point you know on the map, then press Save KML or Save KMZ and open it in Google Earth.
Common mistakes with NTF France III (degrees)
- Feet entered as metres. NTF France III (degrees) 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. NTF France III (degrees) 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. NTF France III (degrees) is meant for France - mainland south of 45.45~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.