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

solar attachment

Earth science; Mapping science

A device which can be attached to an engineer's transit or other kind of theodolite, to permit the instrument's use as a solar compass.

valley crossing attachment

Earth science; Mapping science

An attachment to the telescope of a leveling instrument, consisting of a wedge shaped prism rotatable about an axis parallel to the optical axis of the telescope and deflecting the line of sight. ...

angular aperture

Earth science; Mapping science

The angle subtended, at an object point on the optical axis, by the radius of the entrance pupil.

A survey traverse in which the direction of a measured course is determined by azimuth and verified by taking a back azimuth. To make this kind of traverse, an initial meridian usable as reference ...

true air speed

Earth science; Mapping science

The speed of an aircraft relative to the air around it.

beam splitter

Earth science; Mapping science

A device or optical element that converts a single beam of electromagnetic radiation into two or more beams going in different directions. In the optical and near-optical region of the ...

alluvium

Earth science; Mapping science

The solid material (sand, silt, gravel, or other material) deposited by running water. It may accumulate to form land (the process, and sometimes the result, being referred to as alluvion) or it ...