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

Low-water datum

Earth science; Mapping science

(1) An approximation to mean low water that has been adopted as a standard tidal datum for a specific region although it may differ slightly from a later determination. (2) The dynamic height for ...

Logical contouring

Earth science; Mapping science

A method of drawing contour lines spacing them at intervals proportional to the differences of elevation between points at which the slope changes. The method is based on the fact that contours ...

Debentures

Earth science; Mapping science

Bonds that promise payments of interest and principal but pledge no specific assets. Holders have first claim on the issuer's income and unpledged assets. Also known as unsecured bonds .

Creek

Earth science; Mapping science

(1) A watercourse along which water is usually flowing. (2) A rivulet smaller than a river but larger than a brook.

Vertical control datum

Earth science; Mapping science

(1) The set of constants specifying the coordinate system to which elevations are referred, or (2) the coordinate system specified by the constants. When vertical control is understood to refer ...

Curvature of the ray-path

Earth science; Mapping science

The curvature of the path taken by a narrow beam of electromagnetic radiation in passing through the atmosphere. The curvature is not constant but varies with altitude h. At each point of the ...

(1) A tidal constituent having a period longer than one day. (2) A tidal or tidal current constituent having a period independent of the rotation of the Earth but dependent on the orbital movement ...