Chart datum - meaning and definition. What is Chart datum
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What (who) is Chart datum - definition


Chart datum         
  • U.S. civil and maritime uses of tidal data
LEVEL OF WATER THAT CHARTED DEPTHS DISPLAYED ON A NAUTICAL CHART ARE MEASURED FROM
Mean high water springs; Mean High Water Springs; Lowest astronomical tide; MHWS; MLWS; Mean low water spring; Mean Lower Low Water; MLLW; Mean low water springs; Mean high water; Mean Highwater Mark; Mean High Water Mark; Mean Highwater; Lowest Astronomical Tide; Mean low water; MHHW; National Tidal Datum Epoch; Mean high water spring; Tidal datum; Mean Higher High Water; Mean lower low water; Mean High Water; Highest astronomical tide
A chart datum is the water level surface serving as origin of depths displayed on a nautical chart. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum.
Vertical datum         
REFERENCE SURFACE FOR VERTICAL POSITIONS
Zero-elevation surface; Mean gravity surface; Reference height; Vertical reference system; Height datum; Zero-level elevation; Height system
In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum, is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features (terrain, bathymetry, water level, and built structures) and altitudes of satellite orbits and in aviation.
Record chart         
RANKING OF RECORDED MUSIC DURING A PARTICULAR TIME PERIOD
Chart Hit; Music chart; Record charts; Pop chart; Chart hit; Music charts; Chart topper; Singles chart; Albums chart; Album charts; Single charts; Singles charts; Hit chart; Hit charts; Album Chart; Record Charts; Top 20; Chart-topper; Music Chart; Music Charts; Record Chart; Chart (music); Popularity chart; Chart position (record sales); Chart position; Top 10 (chart); Radio chart; Chilean Singles Chart; Chart hits
A record chart, in the music industry, also called a music chart, is a ranking of recorded music according to certain criteria during a given period. Many different criteria are used in worldwide charts, often in combination.