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
收藏
页码：403 / 424
页数：22
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