手绘地图开域空间方向关系检索法

A Hand-drawn Map Retrieval Method Based on Open Area Spatial Direction Relation

为满足智能化检索地理信息的需求,提出一种基于开域空间方向关系的手绘地图检索方法。首先设计了一种适用于手绘地图检索的开域空间方向关系描述模型。该模型通过开域既能自适应精确描述,又可通过松弛化策略模糊描述手绘对象间方向关系。提出基于开域空间方向关系的手绘地图检索流程,建立了R树空间索引和方向关系相似度计算模型,给出了输出结果的评价方法。采用实际数据的试验结果表明,该方法可在较大范围地图场景中有效检索到排名靠前的结果。

To meet the needs of retrieving the geographic information intelligently,a hand drawn map retrieval method based on open area spatial direction relation is proposed.Firstly,it is designed that a new type of open area spatial direction relation description model and calculation method based on the opening area between the hand objects,which can be used to hand drawn map retrieval,both can be adapted to accurately describe by open area,but also through the relaxation strategy to describe the fuzzy relationship.A hand drawn map retrieval process based on open area spatial direction relation is proposed.The evaluation model,similarity calculation of spatial direction relation and R tree spatial index are given.The experiment results show that the method can retrieve the top ranking results effectively in a large scope map scene.