Knowledge Media Institute Visualisation of entity distribution in very large scale spatial and geographic information systems

The aim of this paper is to summarise entity distribution visualisation problems in very largescale spatial and geographic information systems. The motivation for this theme has arisen when solving a problem of geographic-spatial information system for Open University oriented on visualisation of geographic and logical distribution of university students and administrative organisation. At the beginning, the paper describes algorithms and data structures used by current geographic and spatial information systems. These are visualisation and mapping techniques, user interface problems, clustering analysis, used data structures and network services. Several existing systems are mentioned as examples. In the second part of the paper, suggested approaches and improvements are discussed. These should provide new possibilities, mainly the scalability of system when working with very large numbers of entities.