- 업종: 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 scaler function, if it exists, which has a gradient equal to the total acceleration of the body.
Industry:Earth science
An atomic-time scale established by the U. S. Naval Observatory, with the origin on 1 January 1958 at zero hours UT2 and with the unit (second) equal to the occurrence of 9,192,631,770 cycles of cesium-generated radiation of specified wavelength at zero field.
Industry:Earth science
A nomograph for determining the angle, at a common origin, between the bearing of a great circle and the bearing of a rhumb line to a point. It provides the difference (t minus T) between the two bearings.
Industry:Earth science
The condition existing where the right of owners, or occupants of abutting land, or other persons, to access in connection with a highway is fully or partially controlled by public authority. There are two major varieties of controlled access: fully-controlled and partially controlled.
# Fully-controlled access (full control of access) - the authority is exercised to give preference to thru traffic by providing (access) connections with selected public roads only, and by prohibiting crossings at grade or direct connection to private driveways.
# Partially-controlled access (partial control of access) - the authority is exercised to give preference to thru traffic to a degree that there may be, in addition to (access) connections with selected public roads, some crossings at grade and connections to private driveways.
Industry:Earth science
(1) The ability of the eye to see sharp images of objects that are at different distances.
(2) The ability of the eyes to superpose two separate images.
(3) The limits within which the projectors in a stereoscopic instrument can be rotated for proper orientation. For example, the Multiplex can accommodate small tilts (in the projectors) ranging from about 10<sup>o</sup> about the x-axis to 20<sup>o</sup> about the y-axis.
(4) The limits within which a stereoscopic potting instrument is capable of operating.
(5) The ability of any optical instrument to adjust to differences in distance or brightness of the scene.
Industry:Earth science
The addition to real property by growth, increase, or labor. Land gradually deposited on the bank of a stream by imperceptible means. Title to real property can be acquired by accession to real property.
Industry:Earth science
A list of all courses and distances made good, together with all data to be used in plotting and adjusting the line obtained by dead reckoning.
Industry:Earth science
A component of stellar aberration caused by the revolution of the Earth and Moon about their common center of mass. It is approximately equal to 0". 011 cos H<sub>M</sub>, where H<sub>M</sub> is the hour angle of the Moon. This is a small quantity, taken into account when determining the deflection of the vertical from astronomical observations.
Industry:Earth science
A modified contact base line apparatus consisting of two steel measuring bars (rods), each 4 meters in length, so mounted that contact was effected by making lines on a rod and a contact slide coincide. Each rod formed a metallic thermometer with two zinc tubes, one on each side of the bar; opposite ends of the bar were fastened to one end of each tube while the other end was free to move as temperature changed.
Industry:Earth science
(1) Water. (2) In the civil and old English law, sometimes, a stream or water-course. (3) In Roman antiquity, a site of a mineral spring, usually in the plural, as Aquae Sextiae. (4) An aqueduct, as, the Aqua Cladia at Rome.
Industry:Earth science
