A Study of a Raster-Based Geographical Information System Combined with Object-oriented Database

• Main Author: 王啟凱
• Other Authors: 侯永昌
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/06509365117472172749

碩士 === 國防管理學院 === 資源管理研究所 === 85 === 　　Geographical information system (GIS) has already been considered as an important tool in military or civilian applications. Less integration and disagreement with the real world are the relational database's shortages. The objective of this research is to develop a GIS based on the Gargantini's linear quadtree coding scheme with the object-oriented (OO) analysis and design concept. The Dorado, an object-oriented database management system (OODBMS), is applied to implement the proposed GIS. 　　The Gargantini's linear quadtree coding scheme has advantages of simple algorithm and easy implementation. Object-oriented design and analysis is a useful methodlogy to develop software systems. The proposed raster-based GIS using Two-Level Object-Oriented Model is a new method to demonstrate the feasibility of this research direction. Information in a raster-based map can be classified into many blocks and layers, every block and layer is viewed as a object. The characteristics and relationship among spatial data implied in quaternary codes are transformed into the attributes of objects. 　　According to the implementation of the prototype system, using information query and every kind of basic operations to test and verify its feasibility.