Vertical datum definition

Vertical datum means either a fixed benchmark such as NAVD 88 or a site specific tidal datum such as mean high water, mean low water and mean sea level. NGVD 29 is based on the local mean sea level in 1929, which has changed over time. NAVD 88 is the official civilian vertical datum for surveying and mapping activities in the United States. Tidal datum, such as mean sea level (MSL) or mean high water (MHW), vary according to the specific location, and represent the mean heights observed over the national tidal datum epoch.
Vertical datum means the base elevation used for measuring height. It is calculated by adding the lowest elevation within five feet of an exterior wall to the highest elevation within five feet of an exterior wall on the same building, then dividing the result by two. The highest and lowest points shall be located on the historical or original grade, as determined by the building official.
Vertical datum means either a fixed benchmark such as NAVD 88

Examples of Vertical datum in a sentence

  • Vertical datum used in the Flood Insurance Study, on flood maps and in surveys is 3.

  • Vertical datum shall originate from the MOA Benchmark Network or NGS Vertical Level Line System.

  • Vertical datum shall be referenced to the North American Vertical Datum of 1988 (NAVD 88).

  • Vertical datum shall be the North American Vertical Datum 1988 (NAVD88).

  • Vertical datum shall be NAVD 88, unless otherwise approved by the County Surveyor.

  • Vertical datum shall be identified on the plans as NGVD 29 or NAVD 88.

  • NAVD is based upon Vertical datum used by other North American countries such as Canada and Mexico and was established to replace NGVD because of constant movement of the earths crust, glacial rebound, and subsidence and the increasing use of satellite technology.

  • Project Vertical datum shall be NAVD 88 with equations to legacy City Datum NGVD 29 and any as-built plans that affect the project.

  • As is the case for the pulsed spectra aboveand below ∼ 10 keV, these two spectra are drastically differ- ent, and together reveal a sharp minimum in luminosity of 4U 0142 + 61 around 10 keV.Including now in this high-energy spectral picture the time- averaged CGRO COMPTEL 2σ flux upper limits (red trian- gles in Fig.

  • The coordinate reference system used for the field location work shall be based on NAD 83 Kentucky Single Zone SPCS and the elevation datum shall be based on the 1988 North American Vertical datum (NAVD88).


More Definitions of Vertical datum

Vertical datum means the average of the lowest and highest point on the historical grade, as determined by the building official, within five (5) feet of the exterior walls of the building. The finished ground level shall not be more the two (2) feet above the original ground level. On any building constructed seaward of the high-tide, the low point of the vertical measurement shall be the elevation of the extreme high tide, as shown by the official United States tide table for the year in which the permit is issued.

Related to Vertical datum

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