The analysis of delivery algorithms of spatial information

Spatial information delivery is extremely basic and quite important in the Held of geographic information science. Traditional spatial information delivery is system-oriented or system-centered. Accordingly users have to adapt to the system and complete the delivery of spatial information, and this delivery service mode suffers from personalization and proactivity problems. Aiming at the objectives of spatial information delivery, we give the process of spatial information delivery taking into count personalization and proactivity, and point out three main links: data source collecting, user profile modeling and information dissemination. Then, an analysis of delivery algorithms of spatial information is given subsequently. The adaptability of content-based delivery algorithms, collaborative delivery algorithms and hybrid delivery algorithms are analyzed in-depth respectively, and the application conditions of every kind of algorithms are given clearly.