EPSG:3407 · China
Hong Kong 1963 Grid System to KML & KMZ
Hong Kong 1963 Grid System (EPSG:3407) is a cass coordinate system on the Hong Kong 1963 Grid System datum, with coordinates in metres. Its official area of use is: China - Hong Kong - onshore and offshore.
- Converter already set to EPSG:3407
- 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 “3407” and pick Hong Kong 1963 Grid System.
- 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:3407
Five points inside the area of use of Hong Kong 1963 Grid System, with their latitude and longitude on WGS 84 and their easting and northing in this grid (other units). 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 | 22.35500° N | 114.13500° E | 117,314.30 | 78,141.09 |
| Towards the north-west | 22.49000° N | 113.91000° E | 41,363.18 | 127,264.85 |
| Towards the north-east | 22.49000° N | 114.36000° E | 193,293.89 | 127,220.66 |
| Towards the south-west | 22.22000° N | 113.91000° E | 41,188.32 | 29,175.70 |
| Towards the south-east | 22.22000° N | 114.36000° E | 193,412.04 | 29,131.94 |
Common mistakes with Hong Kong 1963 Grid System
- Easting and northing swapped. In Hong Kong 1963 Grid System the middle of the grid is near easting 117,314.30 and northing 78,141.09. If your easting column holds numbers like 78,141.09, the columns are the wrong way round and every point lands far away: swap them before converting.
- Feet entered as metres. Hong Kong 1963 Grid System 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. Hong Kong 1963 Grid System 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. Hong Kong 1963 Grid System is meant for China - Hong Kong - onshore and offshore. 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.