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

Magnetic azimuth

Earth science; Mapping science

The angle, at the point of observation, between the vertical plane through the observed object and the vertical plane in which a freely suspended, sym-metrically magnetised needle, influenced by no ...

Spheroidal angle

Earth science; Mapping science

(1) An angle (figure) formed by the intersection of segments of two curves on a spheroid. The two segments are called the sides of the spheroidal angle and the point of intersection is called the ...

Normal base line

Earth science; Mapping science

The line following the sinuosities of the low-water mark, except where indentations are encountered that fall within the category of true bays, when the base line becomes a straight line between ...

Angle of current

Earth science; Mapping science

Stream gaging, the angular difference between 90, a and the angle made by the current with a measuring section.

Argument of perigee

Earth science; Mapping science

The angle, at the centre of attraction, from the ascending node to perigee, measured in the direction of motion of the orbiting body.

Accuracy method

Earth science; Mapping science

The method used in determining the stated accuracy of a product.

Albrecht

Earth science; Mapping science

The formula tan A = Sin H sec f cot d (1/(1 a)) where a = tan f cot d cot H, for the astronomical azimuth A of a celestial body in terms of the body's astronomical latitude f , ...