How many types of geodetic datum are there?
There are two main datums in the United States. Horizontal datums measure positions (latitude and longitude) on the surface of the Earth, while vertical datums are used to measure land elevations and water depths.
What is the coordinate system of the Philippines?
Two projected coordinate systems used in the Philippines are the Universal Transverse Mercator (UTM) coordinate system and the Philippine Transverse Mercator (PTM) coordinate system. UTM is a series of global projections that divide the earth into 60 zones, six degrees for each zone.
What is an example of a datum?
An example of a datum is the assumed altitude of a specific piece of land used as the basis in calculating the altitude of the top of a mountain on the land. … The singular form of data; for example, one datum. It is rarely used, and data, its plural form, is commonly used for both singular and plural.
Why do we use a datum?
A datum reference or just datum (plural: datums) is some important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that serves as a reference in defining the geometry of the object and (often) in measuring aspects of the actual geometry to assess how closely they match with the …
What are the major bodies of water that surrounds the Philippines?
The Philippine coastline adds up to 17,500 kms. Three prominent bodies of water surround the archipelago: the Pacific Ocean on the east, the South China Sea on the west and north, and the Celebes Sea on the south.
What zone is the Philippines in UTM?
WGS 84 / UTM zone 51N.
What is geodetic position?
[¦jē·ə¦ded·ik pə′zish·ən] (geodesy) A point on the earth, the coordinates of which have been determined by triangulation from an initial station, whose location has been established as a result of astronomical observations, the coordinates depending upon the reference spheroid used.
What is the most commonly used datum plane?
The North American Datum of 1983 (NAD 83) is the most current datum being used in North America. It provides latitude and longitude and some height information using the reference ellipsoid GRS80.