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

Pulsed Doppler radar

Earth science; Mapping science

Radar capable of determining not only distance to an object but also the object's radial velocity by measuring the Doppler shift in the frequency of the pulses.

As-built drawing

Earth science; Mapping science

An architectural drawing showing the precise details of construction and where equipment and utility lines are located.

Drawdown

Earth science; Mapping science

The lowering of the recorded level of water, at a tide gage, caused by the presence of streams near the tide gage.

Eccentricity

Earth science; Mapping science

(1) A quantity e indicating the amount by which a given conic section differs from a circle, and given by the formula e ≡ ( √ (a - k² (b/a)²), in which a is half the length of the major axis, b ...

Echo sounding

Earth science; Mapping science

Determining the distance from the surface of a body of water to the bottom by measuring the interval of time it takes a sonic pulse to travel from the surface to the bottom and back again. The ...

The Gaussian method of solving a set of simultaneous linear equations by successively solving for each unknown in terms of the others and then substituting this solution into the remaining equations, ...

Echogram

Earth science; Mapping science

The graphic record produced by an echo sounder and showing, as a function of time, the strength of the echo and the time taken for the echo to return. If the ship's velocity is constant, the ...