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本文论述了ＧＩＳ设计原理，通过对ＧＩＳ中点、线、等值线和面状图层的讨论、以及点、线、等值线和面状对象的操作、表示方法，数据结构的分析，给出了面向对象的图形表示方法及图形数据操作方法；提出了图形分区操作处理的方法，以减少系统对内存的过大的要求，增强了系统的使用性，同时讨论了图形分区的方法，并根据系统功能和数据类型等，讨论了将各功能化入不同模块的合理性
This paper discusses the principle of GIS design. Through the discussion of points, lines, contour lines and planar layers in GIS, as well as the operation, representation and data structure of points, lines, contour lines and planar objects, The object-oriented graphical representation method and the graphic data manipulation method are put forward. The method of graphics partitioning operation processing is proposed to reduce the excessive memory requirements of the system and enhance the usability of the system. At the same time, the method of graphics partitioning is discussed. According to the system functions and data types, discussed the various functions into different modules of the rationality