Path of a moving point described by a one parameter set of points.

Device (tag) carried by a vehicle to allow it to determine its location or to be sensed by external objects of known location.

Monitoring and reporting the location of a vehicle.

[editing] Topology is a set rules that dictates the spatial properties of point, line and area features such as connectivity, adjacency and contiguity.

Collection of topological primitives that is closed under the boundary operations.

[software] Topography is the study and mapping of Earth’s features including land surfaces, relief (relative positions and elevations) and the position of natural (water features, physiographic features, etc.) and constructed features (boundaries, cities, parks, landmarks, transportation, buildings, etc.)

Value of time at which an object's state is measured and recorded.

Polygon that encloses one of a set of points on a plane so as to include all direct positions that are closer to that point than to any other point in the set.

[data structure] A thematic layer is a distinct spatial entity in a data layer. They are usually delineated as points, lines and polygons.

Gridded data whose attribute values describe characteristics of a grid coverage feature in a grid format.

Partitioning of a space into a set of conterminous subspaces having the same dimension as the space being partitioned.

Set of conventions defining the origin, scale, orientation and time evolution of a spatial reference system co-rotating with the Earth in its diurnal motion in space.

Data related to concepts or their designations.