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

acceleration error

Earth science; Mapping science

The error resulting from a change in a craft's velocity: e.g., the apparent deflection of the vertical, as indicated by a gyroscope (artificial horizon), when the craft accelerates.

The angle, at a point A on a surface, between the tangent to the meridian at A and the tangent to the geodesic from A to the point B whose geodetic azimuth is wanted. The angle is measured from the ...

alinement error

Earth science; Mapping science

The angle between the actual line of sight of a telescope and the direction in which the horizontal or vertical circles or on an auxiliary telescope indicate that the line of sight should lie.

point mass anomaly

Earth science; Mapping science

One or more point like masses taken to be of such a size and distribution as to account for deviations of the Earth's gravity field from that of an ellipsoid having the same mass, center of mass, ...

acre

Earth science; Mapping science

A unit of area in the English system of measure, defined as 10 square chains (1 chain is 4 rods or 66 feet). It is exactly equal to 43,560 square feet or 4,840 square yards and is approximately ...

appraisal

Earth science; Mapping science

(1) An estimate and opinion of value. (2) Usually, a written statement of the market value or the value as defined by the appraisal, of an adequately described parcel of property as of a specific ...

attenuation

Earth science; Mapping science

Any process in which the flux density, power, amplitude, intensity, or illuminance, etc. , of radiation decreases with increasing distance from the source.