扩展的锥形方向关系查询处理方法

通过加入距离约束，扩展锥形方向关系的描述方式，提出新的查询处理方法——扩展锥形方向二叉树，该方法能处理方向空间连接的查询过滤，通过组合方向和距离关系，提高定性推理的准确性。与传统基于索引的方法相比，该方法能够有效处理大数据集中任意对象间方向关系的查询和定性推理，实现简单、查询效率和推理准确性较高。

Extended Conic Direction Relations Query Processing Method

This paper proposes an extended expression method based on conic direction model considering distance relations. The corresponding construct way, queries processing against two steps including filter and refinement, and spatial reasoning way are developed. Empirical result proves that the method can efficiently fulfill direction and distance relations queries in huge datasets. It is simpler, more efficient and performs better compared with the traditional one.