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Datum (geodesy): Quiz


Question 1: WGS 84 is used by DoD for all its mapping, charting, surveying, and navigation needs, including its ________ "broadcast" and "precise" orbits.
Inertial navigation systemF-15 EagleCompassGlobal Positioning System

Question 2: Horizontal datums are used for describing a point on the ________'s surface, in latitude and longitude or another coordinate system.

Question 3: It is the reference frame used by the U.S. Department of Defense (DoD) and is defined by the ________ (NGA) (formerly the National Imagery and Mapping Agency) (formerly the Defense Mapping Agency).
National Geospatial-Intelligence AgencyNational Reconnaissance OfficeDefense Intelligence AgencyNational Security Agency

Question 4: The most common reference Datums in use in the ________ are NAD27, NAD83, and WGS84.
South AmericaAmericas (terminology)North AmericaAmericas

Question 5: (For example, in Great Britain, the national vertical datum, Ordnance Datum Newlyn, is based on what was mean sea level at Newlyn in ________ between 1915 and 1921).

Question 6: WGS 84 is the ________ of 1984.
GeodesyLongitudeWorld Geodetic SystemGlobal Positioning System

Question 7: Vertical datums are either tidal, based on ________, or geodetic, based on the same ellipsoid models of the earth used for computing horizontal datums.
Physical oceanographyThermohaline circulationSea levelCurrent sea level rise

Question 8: In ________ and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.
Civil engineeringMechanical engineeringEngineeringElectrical engineering


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