Spatial relations description model of planning results-oriented

Spatial relations are spatial data of urban planning decisions and the key focus to text description. To solve this problem, this paper studies the description models of planning decisions’ spatial relations, and analyzes the 4-intersection model in spatial relations of topology. 4-intersection model is widely used in spatial relations. This article improves 4-intersection model, without reducing the types of topological relations that the model can distinguish, by extracting a few of the elements to comprise the model to describe the spatial topological relations, thus achieving simplification. Besides, this article also extends the improved 4-intersection model by the use of Fuzzy Theory. It divides the fuzzy interior, fuzzy boundaries and fuzzy exterior of space objects by trapezoidal membership function, and thus uniformly describes the topological relations. Simulation results show that the improved 4-intersection model has good convergence and high efficiency. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.