Query processing in spatial-query-by-sketch

被引：173

作者：

Egenhofer, MJ

机构：

[1] UNIV MAINE, DEPT COMP SCI, ORONO, ME 04469 USA

[2] UNIV MAINE, NATL CTR GEOG INFORMAT & ANAL, ORONO, ME 04469 USA

来源：

JOURNAL OF VISUAL LANGUAGES AND COMPUTING | 1997年 / 8卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1006/jvlc.1997.0054

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

Spatial-Query-by-Sketch is the design of a query language for geographic information systems. It allows a user to formulate a spatial query by drawing the desired configuration with a pen on a touch-sensitive computer screen and translates this sketch into a symbolic representation that can be processed against a geographic database. Since the configurations queried usually do not match exactly the sketch, it is necessary to relax the spatial constraints drawn. This paper describes the representation of a sketch and outlines the design of the constraint relaxation methods used during query processing. (C) 1997 Academic Press Limited.

引用

页码：403 / 424

页数：22

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