| 地理信息系统中的对象代数 |
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| 引用本文： | 董守斌,吴健康.地理信息系统中的对象代数[J].中国科学技术大学学报,1995,25(2):206-211. |
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| 作者姓名： | 董守斌 吴健康 |
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| 摘 要： | 在一般空间数据库中同时使用关系代数和图象代数给查询优化带来困难．本文提出一种合并的对象代数以支持地理信息系统中的复杂查询．代数的基础是规范化的面向对象的空间数据模型，该模型将图象代数操作与空间物体属性一起集成于物体基元的定义中．最后讨论了基于对象代数上的查询优化．
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| 关 键 词： | 面向对象的数据模型，对象代数，查询优化，地理信息系统 |
Object Algebra for Geographic Information Systems |
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| Dong Shoubin, Chen Xuequan, Wu Jisnkan.Object Algebra for Geographic Information Systems[J].Journal of University of Science and Technology of China,1995,25(2):206-211. |
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| Authors: | Dong Shoubin Chen Xuequan Wu Jisnkan |
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| Institution: | Information Processing Center |
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| Abstract: | Using both relational algebra and image algebra for query processing in conventional spoilal databases has difficulties for query optimization.This paper proposes a combined object algebra to support complex queries in GIS. A formal object-oriented spatial data model is defined, which integrates image algebraic operations and properties of spatial objects to the deign of spoilal object primitives. Also, query optimhation based on the object algebra for GIS is discussed. |
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| Keywords: | object-oriented data model object algebra query optheisation Geographic Informatiom System |
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