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

False bearing

Earth science; Mapping science

The difference between the direct bearing and the back bearing, caused by meridional convergence.

Angle method of traverse adjustment

Earth science; Mapping science

The method of adjusting a survey traverse by using angles between successive courses as the measured quantities.

Azimuth determination from the sun's angular elevation

Earth science; Mapping science

Determination of astronomic azimuth by measuring the Sun's angular elevation, the angle of the marker from the Sun at that instant and the time of measurement. The formula is cot²(½ A s ) = ...

Amplitude of vibration

Earth science; Mapping science

The length of the arc passed over by a pendulum in moving from its average position to the position of greatest displacement.

Locking angle

Earth science; Mapping science

The complement of the interlocking angle. The angular depression of the oblique photograph when the tilt of the vertical photograph is zero.

Abutment

Earth science; Mapping science

The structure, usually of reinforced concrete, supporting an end of an arch or bridge and holding the abutting earth in place.

Chromatic aberration

Earth science; Mapping science

The separation, by an optical or other system, of a single ray of polychromatic light in object space into distinct monochromatic rays in image space, without recombining them. In the absence of ...