- 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 line followed by a ray of light through an optical system. Alternatively, one of the set of lines perpendicular to the wavefronts of light passing through an optical system.
Industry:Earth science
A pendulum whose period of oscillation is measured to determine the intensity of gravity.
Industry:Earth science
A pendulum designed specifically for determining differences between the values of gravit-acceleration at two stations. The term contrasts this type of pendulum with the type designed to measure the total value of gravity-acceleration at a single station.
Industry:Earth science
A printing press that contains an extra, rubber-covered cylinder upon which the image is first printed and then transferred from this cylinder to the paper.
Industry:Earth science
One of the lines in a Moiré pattern. The term is generally used in the plural as a synonym for Moiré pattern.
Industry:Earth science
A pair of images showing the same object from two different points of view in such a way that, when one eye sees a part of one image and the other eye sees the corresponding part of the other image, a three-dimensional effect is produced visually.
Industry:Earth science
(1) The set of all points occupied by the center of mass of a satellite during its motion about the center of attraction. Usually referred to simply as the path of the satellite. It differs from the orbit in that time does not enter explicitly into its definition. It differs from the trajectory of a body in that a trajectory has definite beginning and end points; the beginning and end of a path can be left undefined. (2) The projection of an orbit onto the surface of the primary body. In particular, the projection of an orbit lying in some plane other than one perpendicular to the axis of rotation of the primary, i.e., lying in some plane other than the equatorial plane.
Industry:Earth science
A unit of measure equal to 3 to 4 inches in the United States and to 3.94 inches in the Netherlands.
Industry:Earth science
An aerial mosaic oriented with distances between images of horizontal ground control points true to scale. A controlled mosaic is usually assembled from rectified photographs.
Industry:Earth science
