types of datums
The word, datum, has several different meanings. The best place to find them is in the dictionary. http://dictionary.com/
Data.
Datum in the context of a country (Norway) normally refers to a geodetic coordinate system. In Norway, the following coordinate systems are used: WGS84 Lat/Long - worldwide datum WGS84 UTM - UTM...
datum is the plane in which we can sketch any thing thing