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

Control station

Earth science; Mapping science

(1) A point, on the ground, whose location (horizontal or vertical coordinates) is used as a basis for obtaining locations of other points. (2) A survey station whose coordinates are accepted as ...

Topographic deflection of the vertical

Earth science; Mapping science

That part of the deflection of the vertical which is caused by the gravitational pull exerted by topographic masses. Topographic deflection of the vertical is not the same as deflection of the ...

Current ellipse

Earth science; Mapping science

A graphic representation of a rotary current in which the velocity of the current at different hours of the tidal cycle is represented by vectors. The cycle may be completed in one half tidal day ...

Datum tick

Earth science; Mapping science

One of a pair of marks placed on opposite edges of a chart to indicate the location of a line of longitude or of latitude with respect to a particular datum.

Contract for deed

Earth science; Mapping science

A contract to sell real estate, payments being made in installments; upon payment of the last installment, the deed is delivered to the purchaser.

Elliptical coordinate

Earth science; Mapping science

One of the two angles, celestial longitude and celestial latitude, in an ecliptic coordinate system.

Condensation gravity reduction

Earth science; Mapping science

(1) The process of applying, to a measured or calculate value of gravity, the sum δ c of the following gravity corrections in the order listed: (a) the condensation gravity correction δg c ; (b) ...