| Land and Sea | District | Reservoirs | Reclamation |
Hong Kong Special Administrative Region lies between Latitude 22°08' North and 22°35' North, Longitude 113°49' East and 114°31' East.
Known as the "Hong Kong 1980 Grid", it is constructed on the Transverse Mercator Projection based on HK80 datum.
The Magnetic Declination in 2012 at the centre of Hong Kong is 2°28' west of True North increasing approximately 2' westward annually.
All levels on land refer to the Hong Kong Principal Datum which is 1.23 metres below the Mean Sea Level. All depths in sea refer to the Chart Datum which is 1.38 metres below the Mean Sea Level.