| 1. | The hong kong principal datum is approximately 0 . 88 m below the yellow sea datum
香港的主水平基准面约在黄海基准面下0 |
| 2. | Hong kong principal datum
香港主水平基准 |
| 3. | Hong kong principal datum : the level to which land surveys in hong kong are referenced
香港主水平基准面:香港测量土地的基础高度。 |
| 4. | Tide height is in metre above the chart datum which is 0 . 146 m below the hong kong principal datum
潮水高度为海图基准面以上高度，以米为单位。香港的海图基准面在主水平基准面下0 . 146米。 |
| 5. | Tide height is in metre ( m ) above the chart datum which is 0 . 146 m below the hong kong principal datum
潮水高度为海图基准面以上高度，以米为单位。香港的海图基准面在主水平基准面下0 . 146米。 |
| 6. | All levels in land refer to the hong kong principal datum which is 1 . 23 metres below the mean sea level
水准所有地面水准均以香港主水平基准为计算根据，该基准位于平均海平面以下1 . 23米。 |
| 7. | Coordinates of the digital data are in hong kong 1980 grid , and heights are in metres above the hong kong principal datum
数据库采用香港1980方格网座标系统，参照香港水平基准量度高度，以米为单位。 |
