Search results
Global Positioning Tutorial. At its most basic level of definition, the horizontal datum is a collection of specific points on the Earth that have been identified according to their precise northerly or southerly location (latitude) and easterly or westerly location (longitude).
Dec 7, 2023 · National Geodetic Survey Datums, Frames and Projections information covering vertical datums, horizontal and geometric datums, new datums, datum transformations, coordinate conversions and tidal datums
Horizontal Datum. A horizontal datum is a reference system for specifying positions on the Earth's surface. Horizontal datums have been defined by specifying the 2-D geometric surface using a reference ellipsoid and six topocentric parameters expressing origin, and orientation.
Jul 12, 2018 · The North American Datum of 1983 (NAD 83) is the horizontal control datum for the United States, Canada, Mexico, and Central America, based on a geocentric origin and the Geodetic Reference System 1980. This datum, NAD 83, is the current geodetic reference system.
The horizontal datum can be accessed and used through a collection of specific points on the Earth whose latitude and longitude have been accurately determined by NOAA's National Geodetic Survey. One application of the horizontal datum is monitoring the movement of the Earth's crust.
A horizontal datum is a specified coordinate system for a collection of positions on the surface of the earth. Traditionally, horizontal datums have used classical surveying methods (i.e. Measuring distances and angles through triangul ation surveys) to best fit to the surface of the earth.
Horizontal datums define the geometric relationship between a coordinate system grid and the Earth's surface. Because the Earth's shape is complex, the relationship is too. The goal of this section is to explain the relationship.
