基于地理语义匹配的信息一体化检索

发布时间：2018-03-01 16:47

本文关键词： 一体化检索分词器地理语义匹配模型地图服务　出处：《中南大学》2013年硕士论文　论文类型：学位论文

【摘要】：摘要：目前,获取信息的最快捷方式,莫过于使用搜索引擎。而对于地理信息而言,由于地理数据的复杂性和数据格式的差异性,对于地理信息的获取,缺少便捷的方式和入口。本文正是基于此,探索了文本信息和地理信息的一体化检索服务,研究通过检索关键词,通过匹配地理语义模型的方式,实现对空间信息的便捷获取。本文涉及到文本检索的分词器、地理数据的索引建立、地理语义匹配模型以及地图服务的探索和研究。在文本分词器的研究过程中,提出了分层策略的分词模型,分词效果较好；空间数据索引的建立,探讨了索引数据的格式及搜索排序算法等；地理语义匹配模型的研究是本文的核心内容,通过建立地理语义模式规则和一套匹配模型,实现空间信息的一体化检索。最后详细剖析了Web地图服务的实现机制并发布相应的服务。围绕上述几个模块,结合全球地质矿产一张图系统,实现了空间数据一体化检索的原型系统,实验结果表明,原型系统验证了通过对空间数据建立索引和建立一套地理语义匹配模型的方法而实现关键词检索地理信息的有效性。原型系统在功能上达到初步预期,在效率上还有待优化。
[Abstract]:Absrtact: at present, the quickest way to obtain information is to use search engine. Based on this, this paper explores the integrated retrieval service of text information and geographical information, and studies how to obtain spatial information conveniently by searching keywords and matching geographical semantic model. This paper deals with the word segmentation of text retrieval, the establishment of geographical data index, the exploration and research of geographical semantic matching model and map service. In the process of the research of text word segmentation, a hierarchical strategy word segmentation model is proposed. The effect of word segmentation is good; the establishment of spatial data index, the format of index data and search sorting algorithm, etc. The research of geographical semantic matching model is the core of this paper, through the establishment of geographical semantic pattern rules and a set of matching model, Finally, the realization mechanism of Web map service is analyzed in detail and the corresponding services are published. Based on the above modules and a global geological and mineral map system, a prototype system of integrated spatial data retrieval is implemented. The experimental results show that, The prototype system verifies the effectiveness of keyword retrieval by indexing spatial data and establishing a set of geo-semantic matching models. The prototype system achieves preliminary expectations in function and needs to be optimized in efficiency.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208;TP391.1

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