EPSG:6680 · Japan
JGD2011 / Japan Plane Rectangular CS XII to KML & KMZ
JGD2011 / Japan Plane Rectangular CS XII (EPSG:6680) is a Transverse Mercator coordinate system on the JGD2011 datum, with coordinates in metres. Its official area of use is: Japan - onshore - Hokkaido between approximately 141°E and 143°E - Sapporo city; Asahikawa city; Wakkanai city; Rumoi city; Bibai city; Yubari city; Iwamizawa city; Tomakomai city; Muroran city; Shibetsu city; Nayoro city; Ashibetsu city; Akabira city; Mikasa city; Takikawa city; Sunagawa city; Ebetsu city; Chitose city; Utashinai city; Fukagawa city; Monbetsu city; Furano city; Noboribetsu city; Eniwa city; Ishikari-shicho; Monbetsu-gun of Abashiri-shicho; Kamikawa-shicho; Soya-shicho; Hidaka-shicho; Iburi-shicho (except Usu-gun and Abuta-gun); Sorachi-shicho; Rumoi-shicho.
- Converter already set to EPSG:6680
- Latitude and longitude on WGS 84, as Google Earth uses
- Download the point as KML
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 “6680” and pick JGD2011 / Japan Plane Rectangular CS XII.
- 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:6680
Five points inside the area of use of JGD2011 / Japan Plane Rectangular CS XII, 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 | 43.84500° N | 142.25000° E | 0.00 | -17,220.44 |
| Towards the north-west | 44.86200° N | 141.43400° E | -64,486.84 | 96,100.37 |
| Towards the north-east | 44.86200° N | 143.06600° E | 64,486.84 | 96,100.37 |
| Towards the south-west | 42.82800° N | 141.43400° E | -66,716.23 | -129,874.15 |
| Towards the south-east | 42.82800° N | 143.06600° E | 66,716.23 | -129,874.15 |
Common mistakes with JGD2011 / Japan Plane Rectangular CS XII
- Easting and northing swapped. In JGD2011 / Japan Plane Rectangular CS XII the middle of the grid is near easting 0.00 and northing -17,220.44. If your easting column holds numbers like -17,220.44, the columns are the wrong way round and every point lands far away: swap them before converting.
- Feet entered as metres. JGD2011 / Japan Plane Rectangular CS XII 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. JGD2011 / Japan Plane Rectangular CS XII 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. JGD2011 / Japan Plane Rectangular CS XII is meant for Japan - onshore - Hokkaido between approximately 141°E and 143°E - Sapporo city; Asahikawa city; Wakkanai city; Rumoi city; Bibai city; Yubari city; Iwamizawa city; Tomakomai city; Muroran city; Shibetsu city; Nayoro city; Ashibetsu city; Akabira city; Mikasa city; Takikawa city; Sunagawa city; Ebetsu city; Chitose city; Utashinai city; Fukagawa city; Monbetsu city; Furano city; Noboribetsu city; Eniwa city; Ishikari-shicho; Monbetsu-gun of Abashiri-shicho; Kamikawa-shicho; Soya-shicho; Hidaka-shicho; Iburi-shicho (except Usu-gun and Abuta-gun); Sorachi-shicho; Rumoi-shicho. 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.