Adaptive geovisualization of mobile map based on Voronoi neighborhoods

Abstract

Mobile map is an adaptive map or map-like geovisualisation on mobile information device (MID), which integrates related new techniques (e.g. mobile positioning, mobile computing, mobile communication, multimedia) and adapts to the actual context automatically. Mobile map has become a new application mode in moving environment. Geovisualisation of mobile map has different characteristics from others, so it can't directly copy the visualization mode from desktop maps. This paper analyzes the three main visualization problems and reasons, i.e. geoinformation unbalance between sheets, symbol fragments and unreasonable updating frequency, existing in present models. Based on the analysis, an adaptive geovisualisation model is proposed, which selects geo-objects, calculates adaptive scale, and updates map based on Voronoi neighborhoods. The principle and algorithm are introduced and described respectively. Finally, a test system based on our model is developed. The experiment result proves the new model is feasible and valid to overcome the three problems mentioned above.