Symbology, in the context of Cartographic design, is the use of graphical techniques to represent geographic information on a map. Map symbols for geographic features include Visual variables such as color, size, and shape.

[surveying] A position where surveys are performed from. During land surveys, survey stations make accurate measurements on the ground from these positions.

a spatial distribution which associates a single value with each position in a plane; (technically a field of a single-valued function) usually associated with continuous attributes.

[map projection] SQL is a set of commands used to manage data stored in relational database management systems (RDBMS).

[map projection] A stereographic projection is a mapping function that projects an entire sphere on a plane – except at one point: the projection point.

[remote sensing] Stereo pairs are overlapping photos taken at different positions but of the same area. Parallax is used to interpret height differences within the overlapping area.

Reference frame in which the defining parameters exclude time evolution.

[coordinate system] State Plane Coordinates is a standardized system in the United States based on Lambert conformal conic and transverse Mercator projections.

Such as Federal Public Service, Federal Statutory Bodies, State Public Service, State Statutory Bodies, Local Authorities and Private Sector.

Structured Query Language; a standard interface for access to a relational database through queries that select records matching logical expressions.

An earth resource satellite with high resolution sensors launched by France in January 1986.

Closed surface that differs only slightly from that of a sphere.

[coordinate system] Spherical coordinates is a coordinate system based on a sphere defined by two angles of rotation in orthogonal planes. The most common is latitudes and longitudes in a geographic coordinate system.