EPSG:3857 · World
WGS 84 / Pseudo-Mercator to KML & KMZ
WGS 84 / Pseudo-Mercator (EPSG:3857) is a merc coordinate system on the WGS 84 datum, with coordinates in metres. Its official area of use is: World between 85.06°S and 85.06°N.
- Converter already set to EPSG:3857
- 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 “3857” and pick WGS 84 / Pseudo-Mercator.
- 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:3857
Five points inside the area of use of WGS 84 / Pseudo-Mercator, 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 | 0.00000° N | 0.00000° E | 0.00 | -0.00 |
| Towards the north-west | 51.03600° N | 108.00000° W | -12,022,505.01 | 6,627,664.18 |
| Towards the north-east | 51.03600° N | 108.00000° E | 12,022,505.01 | 6,627,664.18 |
| Towards the south-west | 51.03600° S | 108.00000° W | -12,022,505.01 | -6,627,664.18 |
| Towards the south-east | 51.03600° S | 108.00000° E | 12,022,505.01 | -6,627,664.18 |
Common mistakes with WGS 84 / Pseudo-Mercator
- Which column is which. In WGS 84 / Pseudo-Mercator eastings and northings near the middle of the grid are of similar size (about 0.00 and -0.00), so a swap won't be obvious from the numbers. Check that the first point lands where you expect it before converting the rest.
- Feet entered as metres. WGS 84 / Pseudo-Mercator 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. WGS 84 / Pseudo-Mercator 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. WGS 84 / Pseudo-Mercator is meant for World between 85.06°S and 85.06°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.