Abstract
ABSTRACT Firstly, this paper expounded that the traditional searching based on keywords has a severe deficiency on Recall and Precision because the computer cant understand what information mean efficiently. In Succession, through extending from ordinary information to Geo-spatial information, on th e support of geo-ontology theory and semantic web services technology, this paper discussed the principle, methods and application of ontology-driven geo-spatial information retrieving mechanism in semantic web. In other word, How to structure the framework for running this mechanism, how to build the ontology information models and how to establish the ontology-driven services models are discussed in detail in context. A design of systems for implementing the mechanism and experiment are given at the end of the text. Keywords: Semantic Web, Geo-Ontology, Intelligent Search Engine, Semantic Web Services, Geography Cognize, Processing platform of Knowledge 1. INTRODUCTION With the advent of the era of information explosion, the traditional searching tools based on Keywords cant provide satisfying service for peoples searching in Internet more and more because of those limitation in Recall and Precision[1]. And what leads to the result? There are two main reasons. Firstly, Web Information is deficient in semantic description and expression. In the other words, information is not knowledge. And the second is there are no enough intelligent tools to cognize the existing knowledge, as all known, the searching engines for Web information have no ability to learn. All these lead a popular researching direction in field of searching engine for Web information, that is how to make more knowledge and make more intelligent searching tools for Web information. The Web information bottleneck of limitation in semantic description and intelligent searching is also existing in spatial information, that is it is difficult to share and intelligently query the heterogeneous spatial information. Since the conception of Semantic Web has been defined as well as its hiberarchy has been explained by Tim Berners-Lee the father of WWW, the Semantic Web and its relative technologies have been developed in progress[2]. Especially, the deep research in Semantic Web Services and Geo-Ontology has provided a new method and technology for sharing, semantic matching and intelligent searching for heterogeneous spatial information[3]. As a result, studying a retrieval mechanism for intelligent searching in spatial information has become a new hotspot in the field of geo-information processing. Under this background of study, this paper has discussed the principle of geo-information retrieving mechanism, as well as method and appli cation. In one word, an exploring in theory and a design in archetype system have been discussed in this paper, which are establishing a framework for geo-informations retrieving based on geo-ontology technology, building an ontology model for spatial information, building a service model for retrieving spatial information on ontology model, and constructing a geo-information searching system.
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