| 研究生: |
羅頌濠 Lo, Chong-Hou |
|---|---|
| 論文名稱: |
物件關連式空間資料庫之建置—利用大比例尺數值地形圖重組地理物件 Construction of Object-Relational Spatial Databases – A Methodology for Restructuring Geographic Objects from Large-Scale Digital Topographic Maps |
| 指導教授: |
郭英俊
Kuo, Ying-Jean |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 測量及空間資訊學系 Department of Geomatics |
| 論文出版年: | 2004 |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 93 |
| 中文關鍵詞: | 數值製圖 、空間資料庫 、開放式地理資訊系統 |
| 外文關鍵詞: | Digital Mapping, Spatial Databases, Open GIS |
| 相關次數: | 點閱:96 下載:6 |
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摘要
數值地形圖中蘊藏了豐富的地形地物資訊,很多的GIS應用都會使用數值地形圖資料作為資料來源。在數值地形圖中,地理物件的空間及非空間資料分別利用各式各樣的圖元來表示,而GIS中可操作的資料皆以物件為基本單元。因此,在GIS中使用數值地形圖資料時,必須先進行地理物件重建。地理物件重建工作往往需在各個GIS業務單位中反覆進行,造成不必要的資源浪費。
本研究探討使用大比例尺數值地形圖資料重建地理物件的基本作業流程,以及把圖元資料重建成為符合OGC Simple Feature為基礎的基本地理物件元件所使用的方法;透過開發實驗性的地理物件重建系統,以驗証此方法的可行性。研究成果顯示目前測繪地形圖的作業方式會影響地理物件重建的成效,文中提出了數點改變測量及製圖的作業方式的建議,希望能在不明顯地增加測繪作業成本的條件下,可大幅提升地理物件重建的作業效率。
ABSTRACT
Digital topographic maps contain large amount of geographic information which are widely used in GIS applications. In digital maps, graphical primitives are used to represent the spatial and non-spatial components of the real world phenomenon. In GIS, however, the operable data must be organized into objects. That is why restructuring is required before using the digital topographic maps in the GIS. Different GIS organizations repeat the same restructuring process which is a waste of resource.
This thesis presents a methodology of building spatial database using large-scale digital topographic maps by restructuring the graphical primitives into geographic objects which are based on the OGC Simple Feature Specifications. An experimental system for restructuring has been developed to show the feasibility of this methodology. The result of our research shows that the effectiveness of restructuring is closely related to the map production and data collecting strategies. This thesis also proposes several suggestions, which are intended to achieve higher efficiency with minimum additional cost, by changing the data collecting process and criteria.
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