The Digital Map and AVLN system

摘要

Automobile Vehicle Location and Navigation (AVLN) System is the integrate result of the technology of Spatial positioning and Map. Thus, the composition of GPS, GIS and modern communication technology influents the technique constitutes of the AVLN system directly. The navigation software is composed of disposal of location data, display of digital map, analysis and query of information and digital communication. Now, the major difficulty of the AVLN system spread and applied is lack of digital map and timely traffic information. the production, exchange, selling and secrecy disposal of navigation data are very important to the AVLN system.