Mapping science

Mapping science

The systemic study of the processes and designs involved with map making.

Industry: Earth science

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Mapping science

Horizontal control point

Earth science; Mapping science

A point whose horizontal coordinates, or whose distance and direction to other points of like kind, are known accurately enough that they can be assumed known in further surveys.

Lunar cycle

Earth science; Mapping science

Any cycle related to the Moon's orbit, part-icularly the Callippic cycle or Metonic cycle. The synodic month, etc. , are also considered lunar cycles, although they are rarely referred to as such.

Least count on a micrometre or vernier

Earth science; Mapping science

The finest reading that can be made directly (without estimation) on a micrometre or vernier.

Deed

Earth science; Mapping science

A legal instrument which, when executed and delivered, conveys an estate in real property or an interest therein.

Hydraulic current

Earth science; Mapping science

A current that results from a difference in water level. Most natural currents are of this type.

The amplitude of that term, in the equation for nutation in obliquity, which has the period of the longitude of the Moon's ascending node. Alternatively, the coefficient of cosΩ in the equation Δε ...

Vertical curve

Earth science; Mapping science

(1) A parabolic curve used as a transition curve between different grades or slopes. (2) A Bz curve. (3) A transition curve in the vertical direction. It is usually parabolic and symmetrical ...