地学图形数据的四叉树处理方法研究

介绍了地学图形数据的四叉树编码数据结构．用该数据结构研究地学图形数据的四叉树编码的转换、缩放、存贮等算法，并探讨了二维图形由四叉树编码数据结构转换为光栅显示器显示图形的方法．同时讨论了用Ｃ语言实现地学图形四叉树数据结构的各种算法．本算法适用于二维地学图形的四叉树编码数据的运压缩存贮及各种逻辑图象操作，可节省大量的存贮空间，加快图形／图象数据的运算速度，为计算机图形学的压缩编码技术提供了一种新的研究手段．

Research on quadtree processing approach of geo graphics data

This paper presents the data structure of quadtree coding for geo graphics data.With the data structure,the author researches the algorithms of transformation,contraction and magnification,storage,etc.of quadtree coding for geo graphics data.Also the author probes the approaches which can be used to transform the data structure of quadtree coding for two dimension figures into grating displayed to display geo graphics.Meanwhile the author discusses various algorithms which can be used,with C language programming,to realize store,disphay,transformation of quadtree coding data,and to transform pixel matrix into data structure of quadtree coding for geo graphics.The algorithms are suitable to compressing storage of quadtree coding data for two dimension geo graphics,and to various logical operation of images.By using the methods,lots of store units are economized,computing speed of graphics or images is quickened greatly.The approaches mentioned above provide a new kind of research means for compressing coding technology of computer graphics.