Abstract:

Electronic map load is one of the most important factors that influence the clarity, smooth and gradation of the multi-scale display; and it is also an important indicator in multi-scale representation modeling. All of these make the research of electronic map load more significance. This article analyzed differences of the map load variation between paper map and electronic map; using RGB values-based approach to obtain a large number of electronic map data; explored two-peak changing law of electronic map load by making further research; discussed the curve shape and influencing factor of two-peak changing law of electronic map load. In the end, it established a more scientific and practical electronic map multi-scale model, and this achieved a preferable experiment results.

Key words: Electronic Map, Map Load, Two-peak Changing Model of Map Load, Multi-Scale Display Model, S-Style Curve Model of Map Load