nominative / accusative / vocative neuter singular.gift, present Synonyms: pretium, dōnum, praemium, datiō, oblātiō.( Ecclesiastical ) IPA ( key): /ˈda.tum/, ĭatum n ( genitive datī) second declension.“ datum” in Kamus Besar Bahasa Indonesia, Jakarta: Language Development and Fostering Agency - Ministry of Education, Culture, Research, and Technology of the Republic Indonesia, 2016.( cartography, engineering ) A fixed reference point, or a coordinate system.ĭatum ( plural data, first-person possessive datum ku, second-person possessive datum mu, third-person possessive datum nya).Synonyms: hari bulan, penanggalan, tanggal, tarikh datum ( piece of information ) Synonym: gegevenįrom Dutch datum, from Middle Dutch datum, from Latin datum ( “ given ”, past participle ).ĭatum ( plural datum- datum, first-person possessive datum ku, second-person possessive datum mu, third-person possessive datum nya).Compare English date.ĭatum m ( plural datums or data, diminutive datumpje n)ĭatum is one of the few Dutch words ending on -um that does not have a neutral gender.ĭatum n ( plural data, diminutive datumpje n) datum in Slovník spisovného jazyka českého, 1960–1971, 1989įrom Middle Dutch datum, from Latin datum ( “ given ”, past participle ) (from the practice of signing letters in Latin by noting the date on which they were dispatched).IPA ( key): /ˈdeɪtəm/, /ˈdætəm/, /ˈdɑːtəm/ ( see data for regional distribution).Learn more about North American datums.Borrowed from Latin datum ( “ a given ” ). Because a local datum aligns its spheroid so closely to a particular area on the earth's surface, it's not suitable for use outside the area for which it was designed. NAD 1927 is designed to fit North America reasonably well, while ED 1950 was created for use in Europe. NAD 1927 and the European Datum of 1950 (ED 1950) are local datums. The center of the spheroid of a local datum is offset from the earth's center. The coordinate system origin of a local datum is not at the center of the earth. The coordinates of the origin point are fixed, and all other points are calculated from it.
This point is known as the origin point of the datum. A point on the surface of the spheroid is matched to a particular position on the surface of the earth. Local datumsĪ local datum aligns its spheroid to closely fit the earth's surface in a particular area. It serves as the framework for locational measurement worldwide. The most recently developed and widely used datum is WGS 1984. An earth-centered, or geocentric, datum uses the earth's center of mass as the origin. In the last 15 years, satellite data has provided geodesists with new measurements to define the best earth-fitting spheroid, which relates coordinates to the earth's center of mass. Here are the coordinates for the same control point based on WGS 1984: 34 01 43.778837 -117 12 57.75961 Geocentric datums NAD 1983 and the World Geodetic System of 1984 (WGS 1984) are identical for most applications. The longitude value differs by approximately 3 seconds, while the latitude value differs by about 0.05 seconds. Here are the coordinates in degrees/minutes/seconds (DMS) of a control point in Redlands, California, on the North American Datum of 1983 (NAD 1983 or NAD83): 34 01 43.77884 -117 12 57.75961 Whenever you change the datum, or more correctly, the geographic coordinate system, the coordinate values of your data will change. It defines the origin and orientation of latitude and longitude lines. A datum provides a frame of reference for measuring locations on the surface of the earth. While a spheroid approximates the shape of the earth, a datum defines the position of the spheroid relative to the center of the earth.
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