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

General chart

Earth science; Mapping science

A nautical chart intended for coastwise navigation offshore. A general chart is of smaller scale than a coast chart but of larger scale than a sailing chart.

Bemetist

Earth science; Mapping science

A surveyor who measures distances by pacing them off.

Molecular clock

Earth science; Mapping science

A clock in which the intervals of time are determined by reference to the frequencies radiated or absorbed by rotating molecules. The first clock of this kind was the ammonia clock, using the ...

Bomford's Geoid 1963

Earth science; Mapping science

An approximation to the geoid, prepared by Study Group Number 10 (International Association of Geodesy) under Bomford and presented at the meeting of 1963 in Berkeley, California. It is based on ...

Floating point calculation

Earth science; Mapping science

Calculation in which each quantity used is represented by two numbers: a coefficient and an exponent (e.g. 3. 9528 2 and 1. 01101 3); the rules of arithmetic are applied separately to coefficient ...

Browne's correction

Earth science; Mapping science

A gravity correction gaθ²/2 applied to the value ga of gravity measured by a horizontally accelerated gravimeter to obtain the value of gravity that would have been measured by a stationary ...

Bernoulli's theorem

Earth science; Mapping science

In an inviscid fluid in steady motion, v²/2 + p/D + gz = constant, where v is the rate of flow, p the pressure, D the density, z the depth and g the acceleration of gravity. It is equivalent to ...