COP MODEL – Refinamento de direcionalidade a consultas espaciais em SGBDES

Abstract

The identification of Directional Relationships between objects stored in Spatial Database Management Systems (SDMSs) can set an important additional source of information, especially when they are used in conjunction with other types of information, such as from Metric and Topological Relationships. Such a combination can support decision-making in situations dependent to the relative positioning between Geographical Objects in which the relative direction, and consequently the order of these is of strategic importance, such as the construction of certain buildings, opening of access roads, installation of transmission towers, etc. However, the Directional Relationships concept is not unified, which generates different approaches to the definition of directions, each with its positive and negative characteristics. Therefore, this work proposes the Cone-Over-Projection Directional Model (COP Model) as a hybrid model that includes characteristics of the models based on Cone and Projection. Additionally, the work presents the implementation of the proposed model from the use of Geometric Algorithms, aggregated to a SDMS, since the possibility of reuse of its features, compatibility with previously existing databases and notorious lack of implementations following this aggregated approach.