图形编辑系统中从面状目标到其属性的查询

地理信息系统的图形编辑系统中，从面状目标到其属性查询的关键在于经过多边形内点判别快速地检索出该目标的图形数据与属性数据相互关联的计算机内码。通过对传统面状目标的数据结构改进和对构成面状目标周边的坐标串预处理，利用Ｂｏｒｌａｎｄ Ｃ＋＋环境进行程序设计与调试，在试验系统中实现了从而状目标到其属性的查询，大大地降低了多边形内点判别的运算量，明显的提高了查询的效率。

Inquiry from Area Object to its Attribute Data in Graphic Edit System

The rapid search in internal point determiation in polygon lying in its computer cede which links graphic data with attribute data is the key to the inquiry in Graphic Edit System from area object to its attribute data relating to Geographic Information System. Through improvement in traditional data structure of area object and pre-processing of peripheral coordinate lineup of area object,the program was designed and tested in Borland C enviornment and the inquiry is realized in the experiment system(with a good interface),the calculating quantity of internal point determination of polygon is reduced greatly,and the efficiency of inquiry is raised obviously.