基于锥形模型的空间方向查询研究

Spatial Direction Query Based on Cone Model

分析了基于锥形模型进行空间方向查询的原理,提出应结合不同实际应用领域和针对不同的空间数据特征选择适当的空间方向关系形式化描述模型的思想。按照这种思想,针对全国各省1∶25万县市级行政区划数据,设计并实现了基于八方向锥形模型的空间方向查询,取得了比较好的检索效果。

This paper analyzes the principle of spatial direction query based on cone model, and proposes the idea of selecting proper spatial directional relation formal description model according to different applications and different features of spatial data. Then a spatial direction query based on eight direction cone model is designed and developed for 1：250 000 spatial data of cities of every province in China, and the experimental result is satisfying.