What is the difference between WGS84 and ETRS89?

What is the difference between WGS84 and ETRS89?

1. WGS84 is the World Geodetic System or, more specifically, the most recent revision based on the version established in 1984. 2. European Terrestrial Reference System 1989 (ETRS89) is the geodetic reference frame utilized for the European areas.

What is OSTN15?

the OSTN15 1km grid with an additional flag. parameter to indicate the height datum they. OSTN and OSGM are the transform – ations that link 3D positions measured using GNSS with the national coordinate and height reference systems of Great Britain, Ireland and Northern Ireland.

What is the NAD83 datum?

The North American Datum of 1983 (NAD 83) is the horizontal and geometric control datum for the United States, Canada, Mexico, and Central America. NAD 83 was released in 1986. State-by-state adjustments were completed in the 1990s, an effort referred to as the High Accuracy Reference Network (HARN).

What are GRS80 and NAD83?

NAD83 is an acronym for North American Datum of 1983, a geocentric datum and geographic coordinate system based on the 1980 Geodetic Reference System ellipsoid (GRS80). Mainly used in North America, its measurements are obtained from both terrestrial and satellite data.

What type of projection is UTM?

The Universal Transverse Mercator (UTM) is a map projection system for assigning coordinates to locations on the surface of the Earth. Like the traditional method of latitude and longitude, it is a horizontal position representation, which means it ignores altitude and treats the earth as a perfect ellipsoid.

What are the properties of UTM projection?

The cylinder is secant in the UTM projection; it intersects the globe creating two standard meridians that are 180 km to each side of the central meridian. Also since a Transverse Mercator projection results in extreme distortion in polar areas, the UTM zones are limited to 80°S and 84°N latitudes.