1. It's 7.01 meters below Amsterdam Ordnance Datum . 2. The floor of the quarry is to above Ordnance Datum . 3. Porthywaen was at 132 feet above Ordnance Datum and Llangynog at 320 feet. 4. Elevations reach 211m above Ordnance Datum , just above headsprings in the north. 5. The floodplain is between and above the ordnance datum ( mean sea level ). 6. It reaches a westerly high-point of 152m Ordnance Datum just before entering Banstead. 7. These antennas have an average height above Ordnance Datum of ., or above ground level. 8. The parish of Buckden lies between and above ordnance datum and the parish covers an area of. 9. Between 1844 and 1921, the Ordnance Datum for the British Isles was taken from the level of the Victoria Dock. 10. At West Quay in Bridgwater where the river is tidal the highest astronomical tide level is above ordnance datum ( AOD ).
Mobile