20 Terms
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Mapping science
The systemic study of the processes and designs involved with map making.
Industry: Earth science
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Mapping science
Bache Wurdeman Base Line Apparatus
Earth science; Mapping science
A compensating base line apparatus composed of a bar of iron and a bar of brass, each a little less than 6 metres in length, held together firmly at one end, with the free ends so connected by a ...
Anblock method
Earth science; Mapping science
A method of block aerotriangulation adjustment applied only to horizontal control (planimetry). Elevations are supposed to be satisfactorily accurate or not important. Developed about 1965 by van ...
True anomaly
Earth science; Mapping science
The angle from the line of apsides of an elliptical orbit to the radius vector from the attracting focus to the centre of mass of the moving body. It is commonly denoted by v or by v.
Self reducing alidade
Earth science; Mapping science
An alidade which provides horizontal distance and difference of elevation when the stadia interval is multiplied by the constant displayed by the alidade.
Arc of visibility
Earth science; Mapping science
The arc through which a beacon, usually a lamp, is visible. It is designated by its limiting bearings as observed from the sea.
Turning basin
Earth science; Mapping science
That part of a harbour or channel which is constructed or set aside for the turning of ships.
Ballast
Earth science; Mapping science
Selected material, such as crushed stone, placed on the roadbed to hold the railroad tracks in place.
