矢量、栅格相互转换的新方法  

New Approaches for Mutual Transferring of Vector and Raster

作　　者：黄波[1] 陈勇[1] 

机构地区：[1]中国科学院遥感应用研究所,武汉测绘科技大学

出　　处：《遥感技术与应用》1995年第3期61-65,共5页Remote Sensing Technology and Application

摘　　要：矢量、栅格相互转换是地理信息系统（ＧＩＳ）及遥感、ＧＩＳ集成系统不可缺少的功能。为提高两者相互转换的效率，在分析传统转换方法的基础上，提出了经过改进的新方法─—矢量向栅格转换的颜色填充法和栅格向矢量转换的散列线段聚合法。The mutual transfer between vector and raster is indispensable for a GIS or an inte-grated system of GIS and remote sensing, and the processing efficiency is of the major con-cern. Based on the analyses of traditional approaches , this paper addresses a new approachcalled “color filling”for transferring vector into raster and a new approach Called “aggrega-tion of discrete segments”for the inverse transferring. The main advantages of the “colorfilling” approach are:(1)not necessary to calculatew the intersection points of the centralline of every grid row with the polygon;(2)not necessary to take into account some spe-cial cases that a line intersects with a polygon. Meanwhile,the main advantages of “aggre-gation of discrete segments”approach are:(1)efficiency is higher;(2)can build topologi-cal structure of vector data directly. Moreover,this paper presentsthe approach to calculating the inside point of any polygon, which is the prerequisite for “color filling”ap-proach.

关 键 词：矢量 栅格 GIS 图形数据结构 

分 类 号：P9[天文地球—自然地理学]