GIS Dictionary

The saturation, purity, or intensity of a color.

[navigation] Acronym for Chart Updating Manual. A document containing updates to aeronautical information, used by the U.S. military to update

[Euclidean geometry] A two-dimensional geometric shape for which the distance from the center to any point on the edge is

[Euclidean geometry] A curved line that is a section of a circle, with two vertices, one situated at each endpoint.

[spatial statistics use for geostatistics] A measure of directional variation, on a scale from zero to one, among a set

[GPS] The standard PRN code used by most civilian GPS receivers.

[astronomy] An orbit 22,245 miles (35,800 kilometers) above the equator in which a satellite travels at the same speed that

[geodesy] A reference ellipsoid having a semimajor axis of approximately 6,378,206.4 meters and a flattening of 1/294.9786982. It is the

1 [data analysis] A set of entities grouped together on the basis of shared attribute values. 2 [data models] Pixels

A set of categories for classification that divide the range of all values so that each piece of data is

[cartography] The process of sorting or arranging entities into groups or categories; on a map, the process of representing members