摘要
矢量河网数据渐进式传输与制图综合密切相关。针对经典的Douglas-Peucker算法产生的多分辨率曲线存储模型存在偏移值异常、数据冗余等问题,该文提出了一种基于双侧Douglas-Peucker算法的等级增量模型,并利用该模型结合目标层与几何细节层上的多尺度表达,建立河网多尺度表达模型。基于该模型,在Web环境下进行了实验,结果证明了该模型的有效性。
Progressive transmission of vector river network data is closely related to the cartographic generalization. The multi-resolution curve storage models of the classic Douglas-Peucker algorithm have problems of abnormal offset value and data redundancy. In view of these problems, this paper presented a hierarchical incremental model based on bilateral Douglas-Peucker algorithm, and modeled multi-scale rep- resentation of river networks combining with the multi-scale representation of the level of object element and geometric detail. This model was implemented in the web environment and the results proved the effec- tiveness of.it.
出处
《测绘科学》
CSCD
北大核心
2015年第10期90-92,89,共4页
Science of Surveying and Mapping
基金
国家科技支撑计划项目(2013BAB05B01)
甘肃省财政厅基本科研业务费项目(214146)
