| VQGIS——一种用于知识化地理信息系统KGIS的图示查询言语 |
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| 引用本文： | 吴健康,陈学佺.VQGIS——一种用于知识化地理信息系统KGIS的图示查询言语[J].中国科学技术大学学报,1990(4). |
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| 作者姓名： | 吴健康 陈学佺 |
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| 作者单位： | 中国科技大学无线电电子学系
(吴健康)，中国科技大学无线电电子学系(陈学佺) |
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| 基金项目： | Project is supported by the National Natural Science Fund of China |
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| 摘 要： | 介绍了一个用于知识化地理信息系统KGIS 的图示查询语言VQGIS.它具有良好的交互像定义功能.可以规定KGIS 中所有实体和过程的像图,并建立它们之间的联系,还给出端口像及窗口像的定义.对像语句的种种限定作为重要内容包含在像字典中.VQGIS 的分析器凭借像字典和KGIS 的知识化数据模式的帮助将像语句转换为一系列关系代数运算、框架操作和图象代数运算.用户能容易地进行操作,甚至不需要任何KGIS 的先验知识.
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| 关 键 词： | 可视语言 空间数据库系统 地图制图 |
VQGIS-a Visual Query Language for KGIS |
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| Wu Jiankang Chen Xuequan.VQGIS-a Visual Query Language for KGIS[J].Journal of University of Science and Technology of China,1990(4). |
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| Authors: | Wu Jiankang Chen Xuequan |
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| Institution: | Department of Radio electronics |
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| Abstract: | This paper presents a visual query language for knowledge-based
geographic information system KGIS(VQGIS).VQGIS provides a
friendly interactive icon definition utility,which defines icon sketch for
all entities and procedures in KGIS and builds links between them.Port
icons and window icons are also defined.Constraints for icon sentence
construction are maintained as contents of icon dictionary.With the help
of icon dictionary and knowledge-based data model of KGIS,the parser
of VQGIS translates the icon sentences into a sequence of relational
algebraic operations,frame operations and image algebraic operations.
With VQGIS,users of KGIS can operate without difficulty even if
they have no prior knowledge of KGIS. |
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| Keywords: | visual language spatial data base geographics |
| 本文献已被 CNKI 等数据库收录！ |
