计算机科学 ›› 2010, Vol. 37 ›› Issue (6): 206-210.

• 数据库与数据挖掘 • 上一篇    下一篇

基于GIS系统的空间查询语言

徐承志,许承瑜,钱铁云   

  1. (武汉大学软件工程国家重点实验室 武汉430072);(加州大学尔湾分校电气工程和计算机科学系 加州92617)
  • 出版日期:2018-12-01 发布日期:2018-12-01
  • 基金资助:
    本文受国家973计划资助项目(2007CB310807),国家自然科学基金资助项目(60873007),高等学校学科创新引智计划(B07037)资助。

New Spatial Query Language Based on GIS

XU Cheng-zhi,Phillip SHEU Chen-yu,QIAN Tie-yun   

  • Online:2018-12-01 Published:2018-12-01

摘要: 目前,主流的空间数据查询语言都是在SFA SQL或SQL/MM Spatial这两大国际标准的基础上进行扩展的。然而,这两大标准对于空间查询和空间分析都是函数式的,所以当查询条件增多时,其复杂的查询表达式既不适合普通用户使用,也不利于提高查询的效率。提出了一种基于〔}IS系统的空间查询语言SQDL-G,将空间谓词表示为空间运算符,将子查询结构引入查询表达式中,并在ArcGIS平台上建立了该语言的执行引擎。实验表明,该语言表达灵活,结构清晰,易于被用户接受。

关键词: 空间数据库,空间查询语言,SQDL-G,ArcGIS

Abstract: At present, the mainstream of spatial query languages are extended from SFA SQL or SQL/MM Spatial,two international standards. All these two standards for spatial query and spatial analysis are function style. When search conditions increase,function style language will become too complex to be used by normal user, and too inefficent to execute. In this paper, a new spatial query language, Semantic Query Description Language for Geography (SQDL-G),based on GIS was proposed. The language converts spatial predicates into spatial operators and introduces sulrquery structure. An execute engine of this language was built up based on ArcGIS platform. Experiments showed that this language has an expression of a flexible, clear structure, and easy to user acceptance.

Key words: Spatial database, Spatial query language, SQDL-G, ArcGIS

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