| Summary: | 碩士 === 國立臺灣大學 === 地理環境資源學研究所 === 90 === As Information and Communication Techniques (ICTs) have been developed quickly, they have been changing our living in many ways. More and more people cannot live without services provided by Internet< such as Electronic-mail, World Wide Web (WWW) and File Transfer Protocol (FTP), etc. People can even proceed reading, shopping, music listening, movie viewing and many other entertainments on the Internet. And there is a virtual space constructed by these Internet services named "cyberspace". There are almost as many spatial functions and activities in cyberspace as in physical space. Therefore some people think that the value of traditional geographical space is getting disappeared, because the services in the physical space have been gradually substituted by those in the virtual space or cyberspace. But, as stocks of the .com falling quickly, people perceive that many important spatial functions are still remained in physical space. Therefore, in this study, the major goals were concentrated on finding the value and method of geospatial information in cyberspace.
First, the types and formats of various georeference information were collected and categorized through Internet Protocol (IP) and Domain Name System (DNS). Four spatial scale (continental, national, city and micro scale) georeferenced information, embedded in the packet, were mined out through the relationship between IP allocation and physical space, and then were processed further by the Internet tools, database and algorithm developed by this study. The place, institute and building names were then linked with geocoded data bases to gather the location information as that demanded in general GIS operations.
The results of the research showed that the spatial precision of the mined geoinformation in Taiwan were improved by using traceroute,cookies, place-name (nominal) database and IP look-up table, especially in inferencing the detail scale. Finally, two study cases in micro and national scale were successfully implemented, and a Location-Based Service (LBS) function of a Web-GIS was demoed as an application of georeferenced information. The techniques developed in this research should be able to actively and widely provide network users more personal and location-aware functions and interfaces in the future.
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