GIS原型系统，在sql server数据库支持下，可进行简单的空间点、线、面实体图形的绘制、编辑、存储、提取、重绘、放大、缩小等。-GIS prototype system, sql server database in support of the space can be a simple point, line, surface entities rendering graphics, editing, storage, extraction, redraw, zooming and n