Glossary of Mapping, Charting, and Geodetic Terms |
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Page 6
... representing the equator ( major axis ) is double the length of the line representing the central meridian ( minor ... represented in their true length . Between the selected parallels the scale along the meridians will be a trifle too ...
... representing the equator ( major axis ) is double the length of the line representing the central meridian ( minor ... represented in their true length . Between the selected parallels the scale along the meridians will be a trifle too ...
Page 16
... represents is at a maximum . astrocompass - A direction - finding instrument comprising means for sighting on a celestial body and for mechanically solving the astronomical triangle , especially one adapted to night use . astrodynamics ...
... represents is at a maximum . astrocompass - A direction - finding instrument comprising means for sighting on a celestial body and for mechanically solving the astronomical triangle , especially one adapted to night use . astrodynamics ...
Page 22
... representing the direction to a similar point of an adjacent photograph in the same flight line ; used extensively in radial triangulation . azimuth mark - A mark set at a significant distance from a triangulation or traverse station to ...
... representing the direction to a similar point of an adjacent photograph in the same flight line ; used extensively in radial triangulation . azimuth mark - A mark set at a significant distance from a triangulation or traverse station to ...
Page 30
... representing a standard parallel and a central meridian intersecting near the center of the map . The line representing the central meridian ( geographic ) is straight and the scale along it is exact . All geographic parallels are ...
... representing a standard parallel and a central meridian intersecting near the center of the map . The line representing the central meridian ( geographic ) is straight and the scale along it is exact . All geographic parallels are ...
Page 35
... representing the location of a point in a plane in relation to two intersecting straight lines , called axes . The point is located by measuring its distance from each axis along a parallel to the other axis . If the axes are ...
... representing the location of a point in a plane in relation to two intersecting straight lines , called axes . The point is located by measuring its distance from each axis along a parallel to the other axis . If the axes are ...
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Common terms and phrases
adjustment aerial photographs altitude angle angular astronomical axis azimuth base bench mark called camera celestial body celestial equator celestial meridian celestial sphere chart-A chart circle computed conformal map contour coordinates correction curve datum determined difference direction distance earth ecliptic elevation ellipsoid fictitious geodesy geodetic geographic geoid graphic gravity Greenwich grid ground high water horizontal hour angle instrument intersection latitude length lens leveling rod longitude low water lunitidal interval magnetic map or chart map projection map projection-A map-A map mean measured Mercator method moon navigation negative object oblique observed optical orbit parallax parallel pendulum perpendicular photogrammetry plane polar pole position radar radial reference reference ellipsoid refraction rhumb line rotation satellite scale solar spheroid spirit level station stereoscopic surface survey tangent tape target telescope templet term terrain terrestrial theodolite tide tion topographic transverse traverse triangulation usually vernal equinox vertical
Popular passages
Page 160 - Every particle of matter in the universe attracts every other particle with a force that varies directly as the product of their masses, and inversely as the square of the distance between them.
Page 160 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Page 48 - 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 127 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Page 147 - Map Projection — A systematic drawing of lines on a plane surface to represent the parallels of latitude and the meridians of longitude of the earth or a section of the earth. A map projection may be established by analytical computation or may be constructed geometrically...
Page 152 - 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 96 - ... 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 118 - Their wave lengths are longer than those of visible light and shorter than those of radio waves.
Page 123 - A radial from the isocenter. isostasy — A condition of approximate equilibrium in the outer part of the earth, such that the gravitational effect of masses extending above the surface of the geoid in continental areas is approximately counterbalanced by a deficiency of density in the material beneath those masses, while...
Page 228 - ... revolution from the fact that it can be formed by revolving an ellipse about one of its axes. If the shorter axis is used as the axis of revolution, an oblate spheroid results, and if the longer axis is used, a prolate spheroid results. The earth is approximately an oblate spheroid.