Abstract：As a fundamental problem in the research field of spatial direction relation, representation and modeling for direction relations has been a hot and difficult issue in the areas of geographic information system, spatial database and artificial intelligence in recent years and a series of research achievements have been obtained. This paper comprehensively surveyed the researches on the formal description models for direction relations between precise objects in 2D space, direction relations between precise objects in 3D space and direction relations between fuzzy objects, analyzed and compared various kinds of models and pointed out the advantages and disadvantages of each model. Finally, it clearly pointed out that modeling for 3D direction relations and fuzzy direction relations was a major concern and especially modeling for fuzzy direction relations in 3D space was a priority in the future research. Besides, several key urgent problems were suggested, which provided reference to further research.
王淼 李松阳. 空间方向关系形式化描述研究进展[J]. 计算机应用, 2013, 33(05): 1324-1329.
WANG Miao LI Songyang. Research survey on formal description for direction relations. Journal of Computer Applications, 2013, 33(05): 1324-1329.
2013, Vol. 33 
