- 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 average luminous intensity in the vicinity of a specified object or region.
Industry:Earth science
(1) An image formed by light. The apparatus forming an optical image is called an optical system. That part of a light ray not acted upon by the optical system is said to lie in object space; the part that has been acted on by the optical system is said to lie in image space. There are two kinds of optical images: real (optical) images and virtual (optical) images. If rays from a point in object space converge to a point like volume in image space, the image is said to be real. If the volume is a single point, that point is called the stigmatic image of the corresponding point in object space. If the rays from a point in object space diverge in image space but asymptotes to the rays converge to a point like volume, the image is said to be virtual. Both real and virtual images can be seen, but real images can be recorded on photographic film while virtual images can not. (2) A visible record, such as a photograph, of an image formed by light.
Industry:Earth science
That part of a sequence of symbols (message) which (a) contains what was put in by the sender and (b) was not predictable by the receiver. This is actually a definition of new information; what is already known to the receiver is not information.
Industry:Earth science
The fee payable to the investment management firm for the on-going management of a portfolio. Investment management fees are typically asset based (percentage of assets), performance based (based on performance relative to a benchmark), or a combination of the two but may take different forms as well.
Industry:Earth science
A chart on which lines are drawn connecting points having the same angular difference in direction between grid north and magnetic north.
Industry:Earth science
The interval of time between the upper or lower transit of the Moon and the next high water at a place.
Industry:Earth science
A plateau composed largely of limestone, marked by numerous sinks (deep holes) on the surface and extensive caves below. Bench marks emplaced in a karst must be considered unstable.
Industry:Earth science
The interval of time between the Moon's upper or lower transit over the local or Greenwich meridian and the following high or low water. Where there is considerable diurnal inequality in the tide, separate intervals may be obtained for the higher high waters, the lower high waters, the higher low waters, and the lower low water. These are designated, respectively, as higher high water interval, lower high water interval, higher low water interval and lower low water interval. In such cases, and also where the tide is diurnal, one must distinguish between the upper and lower transits of the Moon with respect to the Moon's declination. Intervals referred to the Moon's upper transit when the Moon's declination is north or to the Moon's lower transit when the Moon's declination is south are marked a. Intervals referred to the Moon's lower transit when the Moon's declination is north or to the upper transit when the Moon's declination is south are marked b.
Industry:Earth science
Any computerized information system designed for analyzing information related primarily to a non cadastral aspect of the land.
Industry:Earth science
Photomicrographic copies of control documents, mounted in cards arranged by State, meridian and township.
Industry:Earth science
