tide heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. Common chart datums are lowest astronomical...

In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such...

An ordnance datum (OD) is a vertical datum used by an ordnance survey as the basis for deriving altitudes on maps. A spot height may be expressed as above...

the vertical geodetic datum accuracy of some offshore areas as represented on nautical charts, especially on small-scale charts. A similar incident involving...

global MSL is a type of vertical datum – a standardised geodetic datum – that is used, for example, as a chart datum in cartography and marine navigation...

geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame) is a global datum reference...

geometric dimensioning and tolerancing Chart datum, level of water depth on a nautical chart Datum or datum point, a (possibly arbitrary) reference baseline...

minor grid lines. A chart's data can appear in all manner of formats and may include individual textual labels describing the datum associated with the...

Port Chart Datum in depth, a turning basin of 600 m in diameter and also at -18 m Port Chart Datum, 1 general cargo berth at -18 m Port Chart Datum, and...

below" is most often noted on charts as measured from the surface of the water to the under side of the bridge at the chart datum Mean High Water (MHW), a...

Additional parameters are sometimes added: The height of the light above the chart datum for height (usually based on high water). e.g. 15m for 15 metres. The...

Post-glacial rebound Subsidence Tectonic uplift Vertical pressure variation Chart datum Geodesy § Heights Geographic coordinates Horizontal position Hypsometry...

water levels ranged from 1.58 feet (0.48 m) to 0.33 feet (0.10 m) below Chart Datum. In the summer of 2007 monthly historic lows were set; August at 0.66...

86° 35' 52"W, on NOAA chart 14963, Grand Marais to Big Bay Point, scale 1:120,000, 2006. Chart datum (as shown on the chart) is 601.1 feet above mean...

(5 ft 7 in) below chart datum. Dry dock number two is 120 metres (390 ft) long, 18.6 metres (61 ft) wide and a has a depth below chart datum of 0.37 metres...

datum for hydrographic surveying and charting in the United Kingdom and Ireland. The following tidal and sea level surfaces are included: Chart Datum...

required. A datum is a theoretically exact plane, line, point, or axis.: 3  A datum feature is a physical feature of a part identified by a datum feature...

noon and that the water level at this time would be two metres above chart datum, and that at the following high tide the water level would be 14 metres...

for couples who reside separately Lowest astronomical tide, a common chart datum Lath (disambiguation) Lat. (disambiguation) HHV Latency Associated Transcript...

berthing for vessels up to 360m long with a water depth of 10m below Chart datum, a ferry berth, and 6.5 hectares of land for unloading, storage and industrial...

are relative to a "chart datum", which is typically the water level at the lowest possible astronomical tide (although other datums are commonly used,...

at suitable scales. Admiralty charts include information on: depths (chart datum), coastline, buoyage, land and underwater contour lines, seabed composition...

approach charts. Vertical datum ICAO recommendations on use of the International System of Units Instrument Landing System Reference Datum Height Eurocontrol...

simply sequences of symbols that may be further interpreted formally. A datum is an individual value in a collection of data. Data is usually organized...

Michigan is held by the state in trust for public use. Wetlands portal Chart datum Mean high water Measuring storm surge Terrace (geology), benches left...

period, water levels ranged from 1.38 to 0.71 feet (42–22 cm) below Chart Datum. The all-time low-water mark was eclipsed in January 2013. In January...

period, water levels ranged from 1.38 to 0.71 feet (42–22 cm) below Chart Datum. The all-time low-water mark was eclipsed in January 2013. Lake Huron...

the large geodetic systems, such as European Datum (ED50), North American Datum (NAD), and Tokyo Datum (TD), to provide a worldwide geo-data basis Need...

cranes. The main navigation channel is dredged to 14.5 metres below chart datum, with a maximum depth of 15 metres[citation needed] alongside the quay...

breakwater for berthing facilities, with an existing water depth of 6 m below chart datum. "2008 National Population and Housing Census: Preliminary Results" (PDF)...