The wireless localization service is called Location-Based Services (LCS), is an value-added service provided by mobile communications network. This paper introduces a self-adaptive fuzzy decision algorithm based on GIS buffer. Candidate matching roads information is stored in GIS buffer. Through selfadaptive adjusting and fuzzy decision, the algorithm advances the differentiation degree betwee...

To explore the constraint range of geographic video space, is the key points and difficulties to video GIS research. Reflecting by spatial constraints in the geographic range, sports entity and its space environment between complicated constraint and relationship of video play a significant role in semantic understanding. However, how to position this precision to meet the characteristic behavi...

In recent years, fuzzy logic has been applied successfully to a wide range of problems. This paper shows how it can be utilized in the area of spatial reasoning, in particular geographic information systems. The problem that we address here is the prediction of erosion from factors such as slope, annual precipitation, etc. These factors are represented as maps in a GIS. The maps are converted i...

For modeling the topological relations between spatial objects, the concepts of a bound on the intersection of the boundary and interior, and the boundary and exterior are defined in this paper based on the newly developed computational fuzzy topology. Furthermore, the qualitative measures for the intersections are specified based on the a-cut induced fuzzy topology, which are (Aa‘qA)(x),12a an...

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One of the important mechanisms for representing topological relations between spatial objects is spatial topology. These relationships help us to model spatial relations between spatial objects in a simple and efficient manner. For achieving this goal there are some difficulties like; complexity of three dimensional relationships, fuzzy spatial properties of objects and dynamic relationships b...

Geographical information system (GIS) is a powerful tool in managing and presenting spatial referenced data science it has a lot of geographic functions such as data integration, mapping, overlaying, buffering, projection....etc, but on the contrary it is a limited tool in decision aiding of spatial decision problems. It can't stand alone in taking decision in spatial problem environment. In th...

Fuzzy spatial objects have become more and more important in GIS applications. When spatial phenomena are generalized by the crisp form, a lot of quantitative information is lost. Land cover as a fuzzy spatio-temporal object should be modeled in a fuzzy framework. In addition, topological relations between fuzzy spatial objects are much more complicated than that are defined between crisp spati...

This paper analyzes a linear feature covering problem (LFCP) with distance constraints, and characterizes the problem by a fuzzy multi-objective (MO) optimization model. An integrated approach combining an Ant algorithm (LFCP-Ant) and a Geographic Information System (GIS) has been devised to solve the LFCP problem in large scale. The efficacy of the proposed approach is demonstrated using a cas...