Difference Between WGS84 and ETRS89

The Reference System WGS84, used for GPS measurements, is based on the global International Terrestrial Reference System ITRS that is fixed on the earth's center of mass. ... ETRS89 is a geocentric Reference System for Europe based on the state of the International Terrestrial Reference System ITRS as of January 1, 1989.

1. What four 4 different things comprise WGS84?
2. What is the difference between GRS80 and WGS84?
3. Should I use NAD83 or WGS84?
4. How accurate is WGS84?
5. Why do we use WGS 84?
6. What is UTM and WGS84?
7. Does Google Earth use WGS84?
8. What is the difference between WGS and UTM?
9. Is WGS84 a projection?
10. What is the most common GPS format?
11. Does Google Maps use NAD27 or NAD83?
12. Is NAD 1983 a projected coordinate system?

What four 4 different things comprise WGS84?

Actually, WGS84 stands for World Geodetic System 1984 and comprises of four different things:

• an ellipsoid.
• a horizontal datum.
• a vertical datum.
• a coordinate system.

What is the difference between GRS80 and WGS84?

Please note that the GRS80 and WGS84 are considered to be the same. Actually, there is a very small difference in the flattening which results in the semi-minor axis, b, being different by 0.0001 meters. There is no known application for which this difference is significant.

Should I use NAD83 or WGS84?

WGS84 has error less than 2cm from center of mass which is better than NAD83. 5. One other main difference between WGS84 and NAD83 is points over Northern American plate for NAD83 does not change whereas WGS84 is defined with respect to average of stations all over the world.

How accurate is WGS84?

The accuracy of WGS84 (G1762) as realised using the broadcast ephemeris and ranging data is now typically 2-5 metres.

Why do we use WGS 84?

WGS84 is standard for GPS

The Global Positioning System uses the World Geodetic System (WGS84) as its reference coordinate system. It's made up of a reference ellipsoid, a standard coordinate system, altitude data, and a geoid. ... Geodesists believe the error is less than 2 centimeters which is better than NAD83.

What is UTM and WGS84?

UTM is common for larger GIS projects. WGS84 allows you to have a datum in the full meaning of the term, and this is projected using the map projection. UTM is a map projection system: Universal Transverse Mercator.

Does Google Earth use WGS84?

Google Earth (also Google Maps and Microsoft Virtual Earth) use a Mercator projection based on a spherical datum (in ESRI parlance, datum = “Geographic Coordinate System; GCS”) that is a modification of the WGS84 datum.

What is the difference between WGS and UTM?

The difference is that WGS 84 is a geographic coordinate system, and UTM is a projected coordinate system. Geographic coordinate systems are based on a spheroid and utilize angular units (degrees).

Is WGS84 a projection?

The North American 1983 datum (NAD83) uses the Geodetic Reference System (GRS80) ellipsoid while the World Geodetic System of 1984 (WGS84) uses the WGS 84 ellipsoid. ... For example, the “WGS84 projection” is a geographic one. A UTM projection is a projected one.

What is the most common GPS format?

Most GPS devices provide coordinates in the Degrees, Minutes and Seconds (DMS) format, or most commonly the Decimal Degrees (DD) format.

Does Google Maps use NAD27 or NAD83?

For FM and LPFM radio stations, the FCC uses an older coordinate system called NAD27 whereas most coordinates including Google Maps coordinates, use the newer NAD83 system.

Is NAD 1983 a projected coordinate system?

UTM NAD83 is a projected coordinate system that represents physical locations abstracted to a flat, cartesian coordinate system. The UTM NAD83 projection uses the GRS80 ellipsoid and a center-of-the-earth anchor point as its datum, both of which are slightly different than the WGS datum.