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

[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.)

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

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

Monitoring and reporting the location of a vehicle.

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

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

Set of actions joined into the same unit of work, such that the actions either succeed or fail as a unit.

Device that converts one type of energy to another.

Person’s activity to switch between transport modes, transport networks or transport means.

Collection of data for the purpose of a data transfer.

Component of SONAR that converts an electrical impulse into a sound wave and sends the wave into the water.

Means that travellers can choose for transport.