- 行业: 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, ...
A way or road for carts; usually, a rough road used by or passable only by carts.
Industry:Earth science
A call for a topographic or cultural feature along a surveyed line.
Industry:Earth science
The difference between the elevation of a newly constructed highway and the elevation of the land, street or highway previously existing at the site.
Industry:Earth science
In a Cassegrainian telescope, that point behind the primary mirror at which light from the secondary mirror is brought to a focus. The term is sometimes applied to a focal point behind the primary mirror in any kind of telescope.
Industry:Earth science
An hour circle through the equinoxes or the solstices. Equivalently, a great circle, on the celestial sphere, perpendicular to the ecliptic at the equinoxes or solstices.
Industry:Earth science
An underground pit with porous walls, used to catch and temporarily contain sewage and other liquid refuse. The refuse decomposes, filters out from the pit, and is absorbed into the soil.
Industry:Earth science
A vertical-control datum defined, by Order in Council 11 March 1935, as: mean sea level as determined at coastal points by the Canadian Hydrographic Survey and extended inland by the Canadian Geodetic Survey.
Industry:Earth science
Rectangular Cartesian coordinate system in which the divisions along both axes have the same length.
Industry:Earth science
