双峰型电子地图载负量变化规律的探究

电子地图载负量是影响电子地图多尺度显示清晰性、平滑性和层次性的重要因素，也是多尺度显示模型建立的重要指标，因此，对电子地图载负量的研究具有重要意义。文章分析了电子地图与纸质地图载负量变化规律的差异性；采用基于RGB值的方法获取了大量的电子地图载负量数据，在此基础上对其变化规律进行了研究，探索出了双峰型电子地图载负量变化规律，并对双峰型电子地图载负量变化曲线形态、影响因素等进行了深入探讨；最后，基于双峰型电子地图载负量变化规律，建立了较为科学实用的电子地图多尺度显示模型，取得了较好的实验效果。

Research and Application of Two-peak Changing Law of Electronic Map Load

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.