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Constants CORRECT ANSWERS According to the NGS, Datums are defined as; "A set
of ____________ specifying the coordinate system used for geodetic control.
An Initial Point
Several Measurements CORRECT ANSWERS What two things do Datums require?
Earth CORRECT ANSWERS Land surveys begin at initial points, which are located at
the or center of the ________.
Vertical CORRECT ANSWERS A ________ datum is used to create reference points
for elevation (ie: mean sea level.)
Horizontal: NAD27, NAD83, WGS84
Vertical: NGVD29, NAVD88 CORRECT ANSWERS Which five horizontal & vertical
datums do you need to know?
Triangulation
NAD27
Meade's Ranch, Kansas CORRECT ANSWERS As the scope of ____________ across
the US grew, the _____ was established and a new initial point was chosen at
_________.
Geocentric CORRECT ANSWERS Modern day professional land surveyors require
________ datums.
Terrain CORRECT ANSWERS The physical surface of the earth is called the
_________
Geoid CORRECT ANSWERS The term, __________, describes gravity on the earth's
measured surface.
Ellipsoid CORRECT ANSWERS The mathematical approximation of the surface of the
earth is called an
Surface Instruments