IGB/T17798—2007目次前言.....................................................................................in1范Bl............................................................................................................................................................................12规范性引用文件..........................................................................13术语和定义..............................................................................14总则....................................................................................44.1空间数据模型..........................................................................44.2标准的格式............................................................................44.3规则的符号............................................................................44.4文件结构基本组成元素..................................................................44.5格式中的关键字........................................................................54.6文件类型..............................................................................64.7可扩展的原则.........................................................................65矢量数据交换格式..........................................................................75.1一般规定..............................................................................75.2文件头.......................:........................................................75.3注释...............................................................................IO5.4要素类型参数.........................................................................115.5属性数据结构........................................................................H5.6几何数据.............................................................................125.7注记.................................................................................185.8拓扑数据.............................................................................185.9属性数据.............................................................................195.10图形表现数据.......................................................................195.11矢量数据交换格式示例..................................................................216正射影像数据交换格式.....................................................................211.11一般规定.............................................................................211.2正射影像数据的原点和存贮顺序.........................................................211.3内容和格式...........................................................................217格网数据交换格式.........................................................................237.1格网的值.............................................................................237.2格网的原点和存贮顺序.................................................................237.3数据文件组成.........................................................................237.4内容和格式...........................................................................237.5格网数据交换格式示例.................................................................25附录A（规范性附录）空间数据的概念和对象模型..............................................26A.1概念模型...........................................................
