- 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, ...
The angle subtended, at an object point on the optical axis, by the radius of the entrance pupil.
Industry:Earth science
A survey traverse in which the direction of a measured course is determined by azimuth and verified by taking a back azimuth. To make this kind of traverse, an initial meridian usable as reference must be established.
Industry:Earth science
A device or optical element that converts a single beam of electromagnetic radiation into two or more beams going in different directions. In the optical and near-optical region of the electromagnetic spectrum, a common type of beam splitter is a semi-reflecting mirror set with its normal at an angle to the direction of the beam. Another type is a completely-reflecting mirror with its normal set at an angle to the direction of the beam, but obscuring only a part of the beam. In a third type, a prism may be used instead of a mirror.
Industry:Earth science
A grid system used with Australian maps on the transverse Mercator map projection and having its origin on the equator. Eastings are given the value 500,000 plus the value given by the formula for distances from the central meridian; northings are given the value 10,000,000 plus the negative value given by the formula for distances from the equator. Each grid covers a sector 6° wide, with ½° overlap on adjacent grids. The central scale factor is 0. 9996 in all directions. Officially called the Australian Map Grid (AMG).
Industry:Earth science
The rights granted by a fee simple, lease agreement, or other conveyance of an estate in real property to build upon, occupy, or use, in the manner and degree permitted, all or any portion of space above the ground or any other stated elevation within vertical planes (through the boundaries of the property).
Industry:Earth science
The relative orientation of successive models of a strip, on a stereoscopic plotting instrument, without using any auxiliary data.
Industry:Earth science
The process of connecting, with a straight line, the nadir points of two vertical photographs selected from overlapping strips.
Industry:Earth science
