【摘要】 数字化地形图在国土、水利、公路、测绘等部门都有巨大的意义,但目前的地形图数字化软件没有解决海量图元管理问题,具有运行速度慢的缺点。为了提高速度,人们采用了对图形进行分割的方法,实行分块管理,但是存在图形总体管理效率低下等缺点。为此,本文运用并行运算圆满地解决了图形总体管理与速度的问题。更多还原

【Abstract】 Digital relief map is very significative in the fields of soil,water conservancy,highway and surveying,but the present digital relief map software has not resolve the manage ment problem of large graphic primitive,and it has the shortcoming of slow speed.In order to enhance the speed,people have to divide the map into many parts,so they can manage them.Thus,it is very inconvenient to manage the whole map.So we resolve the conflict between the speed and the management from parallel algorithm in this article.更多还原