| Summary: | 碩士 === 國立成功大學 === 測量及空間資訊學系碩博士班 === 93 === Thematic maps have been widely used in daily lives for policy makers to realize and analyze spatial phenomena in reality. With the rapid development of Internet and GIS technology in recent years, to access a variety of thematic maps via internet is no longer an unreachable dream for today's users. Nonetheless, such Web-based GISs often restrict their contents to maps already edited and stored in databases, rather than allowing na?ve users to submit data via internet and create thematic maps meeting their demands. The challenge of creating thematic maps must consider not only professional cartographic knowledge, but also the appropriate settings of the spatial and thematic data. From an OpenGIS perspective, the recent progress in GIS standards and data interoperability has offered a new possibility for the creation and distribution of thematic data. Unfortunately for those domain users without mapping knowledge and spatial data, the lack of an intelligent coordinated thematic mapping architecture still impedes them to take advantage of the convenience current OpenGIS technology can bring.
The proposed web-based thematic map service successfully integrates a number of OpenGIS standards, namely, Geolinked Data Access Service (GDAS), Geolinking Service (GLS), Web Map Service (WMS), and further augment its mapping capability with built-in rule-based cartographic knowledge about thematic map making. Since the whole architecture is capable of analyzing the characteristics of thematic data and determine applicable categories of thematic maps, na?ve users can therefore easily interact with the thematic map service in a standard browser environment by uploading their data and receive thematic maps in image format. Comparing to some of the current closed and inflexible centralized data archive; the apparent advantages of the proposed system architecture include the standardized interface between servers, easier data integration and interoperability and the convenient map design environment to users without prerequisite knowledge. Clearly the success of the proposed system architecture can tremendously expand the number of users because the barriers of mapping knowledge and lack of spatial data have now been removed. With more services and spatial framework available, such convenient thematic mapping service will no doubt serve as an indispensable tool to a variety of domain users in the near future.
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