## A DOD Glossary of Mapping, Charting and Geodetic Terms |

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### Common terms and phrases

adjustment aerial altitude angle angular apparent applied astronomical axis azimuth base bearing body called camera celestial chart circle computed coordinates corner correction curve datum definition designed determined difference direction distance earth effect elevation equal equator error established expressed field force geodetic geographic given graphic gravity grid ground height horizontal indicate intersection interval latitude length lens light longitude magnetic map projection mark material mean measured ment meridian method moon negative normal object oblique observed obtained optical orbit orientation original parallel pass period photograph placed plane plate pole position precise principal produced quantity radar radial reading reference reflected relative represented resulting rotation satellite scale showing side sphere spheroid standard station strip surface survey tape term tide tion transit traverse triangulation true unit usually vertical

### Popular passages

Page 42 - Every particle of matter, in the universe, attracts every other particle with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Page 107 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.

Page 127 - The average height of the surface of a river at any point for all stages of the tide over a 19-year period usually determined from hourly height readings.

Page 132 - M) — A tendency to cause rotation about a point or axis, as of a control surface about its hinge or of an airplane about its center of gravity; the measure of this tendency, equal to the product of the force and the perpendicular distance between the point of axis of rotation and the line of action of the force. Moment of Inertia...

Page 82 - ... geodetic meridian. A line connecting points of equal geodetic longitude. Also called geographic meridian. See astronomical meridian. geodetic parallel. A line connecting points of equal geodetic latitude. Also called geographic parallel. See astronomical parallel. geodetic position. A position of a point on the surface of the earth expressed in terms of geodetic latitude and geodetic longitude. A geodetic position implies an adopted geodetic datum, which must be stated for a complete record of...

Page 173 - A basic subdivision of an antenna which in itself is capable of radiating or receiving radiofrequency energy. radiation. 1. The process by which electromagnetic energy is propagated through free space by virtue of joint undulatory variations in the electric and magnetic fields in space.

Page 101 - Their wave lengths are longer than those of visible light and shorter than those of radio waves.

Page 129 - Local mean time at the Greenwich meridian; the arc of the celestial equator, or the angle at the celestial pole, between the lower branch of the Greenwich celestial meridian and the hour circle of the...

Page 133 - ... (photogrammetry) An assembly of overlapping aerial photographs whose edges usually have been torn, or cut, and matched to form a continuous photographic representation of a portion of the earth's surface.

Page 123 - See culture. manuscript— The original drawing of a map as compiled or constructed from various data, such as ground surveys and photographs. See also multi-use manuscript (MUM).