【摘要】 热力图是一种能直观准确展示空间观测值的有效工具,在多个领域具有广泛应用。本文在分析设定不同道路层权重、道路技术等级分类的基础上,以反距离权重、直方图均衡化、密度补偿、参数多次迭代等方法,研究构建了以热力方式展示道路网分布及发达程度的相关规则体系。热力规则通过道路赋权、路线曲面化、密度协调、图面综合等多套规则的有机结合,实现了道路网总体发达水平信息的提取与展示,并以全球地理信息资源建设项目路网成果中的亚洲和非洲部分国家数据为例,进行了信息提取与热力分布试验。更多还原

【Abstract】 Heat map is an intuitive and accurate presentation tool for spatial observation,which is wildly used in many fields. Based on analyzing and setting the various layer weights and technical grades of road,the methods of inverse distance weight,histogram equalization,density compensation and repetitive parameter iteration are used comprehensively. And this paper constructs the rule architecture of heat map to demonstrate the distribution state and development level of roads in certain region. The heat map rule architecture describes the rules of road weighting,line-to-surface modification,dot density adjustment and liner fitting,and so on,which can extract and demonstrate road development level accurately. Based on road data in some some Asian and African countries of global geographic information construction projection,information abstraction and heat map distribution test have been done to verify the feasibility and reliability of the rules.更多还原