【摘要】 本文提出了一种河网矢量数据双层次多尺度表达的渐进式传输模型,结合目标层次的河流选取和几何细节层次的曲线多尺度表达,建立了河网多尺度数据结构。在Client/Server结构的WebGIS系统中进行了实验,结果表明该方法用于河网矢量地图数据的渐进式传输是有效的。更多还原

【Abstract】 This paper presented a bi-hierarchical and multi-scale representation model for purpose of progressive transmission of river network vector data.The multi-scale structure of river network was constructed by integrating selected river branches at the level of object element and simplified curves at the level of geometric detail.The experiments were implemented on a WebGIS system with a client/server structure.The results showed that the progressive transmission method was efficient for river network vector data.更多还原