- Industry: Earth science
- Number of terms: 93452
- Number of blossaries: 0
- Company Profile:
Founded in 1941, the American Congress on Surveying and Mapping (ACSM) is an international association representing the interests of professionals in surveying, mapping and communicating spatial data relating to the Earth's surface. Today, ACSM's members include more than 7,000 surveyors, ...
The systematic movement of the projectors, in a stereoscopic plotter, in the direction of the line of flight of the aircraft which took the pictures.
Industry:Earth science
A design proposed by A.P. Colvocorresses and the U.S. Geological Survey for a satellite and auxiliary equipment to map the Earth.
Industry:Earth science
A stereoscopic plotter consisting of two or more projectors that can be translated or rotated independently, each projecting an image in either red or blue-green light. The images being projected are on small transparencies (called diapositives) reduced from the original, photographic negatives. When the projectors are spaced an appropriate distance apart and the projected images (i.e., the images formed by projection onto a suitable surface) are viewed through spectacles having a red filter in one frame and a blue-green filter in the other, a stereoscopic image (called the stereoscopic model) is seen. Measurements made on it would, in an ideal situation, be directly proportional to corresponding measurements on the original object. The pair of differently colored, projected images is called an anaglyph.
Industry:Earth science
The process of transferring an image photographically to the surface of a metallic plate or other material and selectively etching the material so that printing is done by the regions not in relief. Sometimes erroneously called photoengraving.
Industry:Earth science
A distance equivalent to 5 chains. The term was used in some field notes and deeds in the early 1800's in America.
Industry:Earth science
The vertical-control datum used in Great Britain for the Third Geodetic Leveling. It is based on mean sea level at Newlyn, England, during a specific period.
Industry:Earth science
An orbit having an inclination of about 90<sup>o</sup> to the equator of the primary and therefore passing near the poles of the primary.
Industry:Earth science
The interval of time between two successive passages of the Moon through the perigee of its orbit. The anomalistic month contains approximately 27.55455 mean solar days.
Industry:Earth science
One of a set of systematic, rotational adjustments of a projector in a photogrammetric device. The projector is usually supported in an assembly of nested gimbals (Cardan suspension), or its equivalent, allowing rotation about any of three mutually perpendicular axes (called-x axis, y-axis and z-axis). Rotation of the projector within the inner gimbal is about the z axis and is called swing. The inner gimbal rotates about the x-axis (secondary axis); this rotation is called x-tilt. The outer gimbal rotates about the y-axis (primary axis); this rotation is called y-tilt. (The same names are applied to rotations about these axes when the projected is supported by some mechanism other than nested gimbals.)
Industry:Earth science
