Xuehua TANG

Work place: School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, China

E-mail: tangxuehua@sohu.com

Website:

Research Interests: Program Analysis and Transformation, Comparative Programming Language Analysis, Data Structures and Algorithms

Biography

TANG Xuehua borned in Qinzhou City, GUANGXI PROVINCE, 1977. She received her Diploma degree in information system from the Wuhan University, China, in 1998, and his Ph.D. degree in from the Wuhan University, China, in 2008. Since 2000, she was lecturer at the Wuhan University, Wuhan, China. Her research interests are spatial relations, spatial analysis, fuzzy spatial reasoning, processing of Remote Sensing data, uncertainty

Author Articles
A Quantitative Directional Relations Model Considering Topology and Distance

By Xuehua TANG

DOI: https://doi.org/10.5815/ijigsp.2010.02.03, Pub. Date: 8 Dec. 2010

Original models for direction relations ignored the restriction of topology and distance relations to direction representation. To improve the representation of direction relations model by pondering about the influence of topology and distance relations on direction relations, we categorize direction reference frame into topological reference and coarse directions reference and present a new direction relations quantitative and statistics models based on the new direction reference frames. Instead of degree, this new model uses a coordinate-based quantitative method to describe direction relations for the distance restrain, while it reflects the constraints of topology by the direction reference frame and by the coordinate representation. It covers all intricacies imposed by different types of objects and has more sensitivity to the configuration of objects. Experiments have been carried out and the results indicate the excellent efficiency in view of directional description.

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