geographic information systems
type: Concept
narrower: navigation systems

navigation systems
definition: Although earlier in human history travelers might seek guidance from the stars using a mechanical compass, in the global era, the dominant form of a navigation system is provided by satellite. Global navigation satellite systems (GNSS) are satellite constellations that generate signals that can be received virtually anywhere, anytime, and in any weather anywhere in the world. [Source: Encyclopedia of Global Studies; Navigation Systems]
broader: geographic information systems
type: Concept

concepts
type: Collection
type: ConceptGroup
member: navigation systems