circle
[Euclidean geometry] A two-dimensional geometric shape for which the distance from the center to any point on the edge is equal; the closed curve defining such a shape.
GIS Dictionary
circular arc
[Euclidean geometry] A curved line that is a section of a circle, with two vertices, one situated at each endpoint.
circular variance
[spatial statistics use for geostatistics] A measure of directional variation, on a scale from zero to one, among a set of line vectors. Circular variance approaches zero when all vectors … Read more
civilian code
[GPS] The standard PRN code used by most civilian GPS receivers.