- 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, ...
A survey made to determine the horizontal and vertical locations of cannon with respect to each other and the targets.
Industry:Earth science
The sum of the products of the weights of the unadjusted observations and the reciprocal weights of the adjusted observations must be equal to the number of observations for the problem to have a unique solution.
Industry:Earth science
A partially submerged coral reef on the seaward side of a lagoon. A prominent example is the Great Barrier Reef of Australia.
Industry:Earth science
Radial aerotriangulation using the nadir point instead of the principal point.
Industry:Earth science
The line from the center of an ellipse to the extremity of the longest diameter. i.e., one of the two longest lines from the center to the ellipse. The term is also used to mean the length of the line.
Industry:Earth science
A line through the perspective center of a photograph and perpendicular to the principal plane of the photograph.
Industry:Earth science
The vertical distance between mean sea level of the ivory point (zero point) of a station's mercury barometer. The term is denoted by the symbol Hz in international usage. The value of atmospheric pressure with respect to this elevation is termed actual pressure. The requirement that the elevation be referred to mean sea level may be replace by the requirement that it be referred to the geoid.
Industry:Earth science
An altitude or elevation determined using a barometer or barometric altimeter.
Industry:Earth science
The criterion used by the artillery of some countries for accepting or rejecting data, requiring that measurements farther from the average than 4 standard deviations be rejected.
Industry:Earth science
The product NA of the refractive index N of the medium in image space by the sine A of the half angle of the cone of illumination there. In microscopic optics, this definition with object space substituted for image space is preferred.
Industry:Earth science
