A Computation Method of Parcels′ Topological Relations Based on Oracle Spatial
Xiaoguang Zhou, Guosen Yue · Journal of Central South University of Technology(Natural Science) · 2005
A computation method of the topological relation between parcels was developed based on Oracle Spatial. In this paper, 31 kinds of topological relations between parcels are firstly distinguished according to D4I model, which includes 8 kinds of relations between two simple parcels, and 23 kinds of relations between a parcel with one hole and a simple parcel. Then the computation method of the topological relations was presented, the relations between simple parcels was ascertained directly by the query operators that Oracle Spatial supported. The results show that the relations between a parcel with one hole and a simple parcel can not be ascertained directly, and the parcel with one hole is divided into two simple parcels according to D4I model. Such kinds of relations can be ascertained by the relations of 2 pairs of simple parcels, which can be ascertained directly. In addition, a topological relations computation method between parcels is developed in this paper, which can determine 31 kinds of topological relations between two parcels. This method can be used to the topological relations computation of other regions and other composite entities in 2-dimension euclidean space.