ICS 7.04 CCS A 75 12 天津市 地方 标准 DB 12/T 473.1—2021 代替 DB 12/T 473-2012 天津市基础地理信息要素数据字典 第1 部分：1:500 1:2000 基础地理信息 要素数据字典 Data dictionary for fundamental geographic information features in Tianjin — Part 1：Data dictionary for fundamental geographic information features of 1 ﹕500 1﹕2000 scale 2021 - 10 - 27发布 2021 - 12 - 01实施 天津市市场监督管理委员会 发布 DB12/T 473 .1—2021 I目次 前言............................................................... ............................................................... ....................................... III 1范 围............................................................... ............................................................... ....................................... 1 2 规范性引用文件 ............................................................... ............................................................... ................... 1 3 术语和定义 ............................................................... ............................................................... ........................... 1 4 基本规定 ............................................................... ............................................................... ............................... 3 4.1 空间和时间参考系 ............................................................... ............................................................... ...3 4.2 制图表示 ............................................................... ............................................................... ................... 3 4.2.1 符号 ............................................................... ............................................................... ............... 4 4.2.2 注记 ............................................................... ............................................................... ............... 6 4.3 基础地理信息要素数据表达 ............................................................... .................................................. 8 4.3.1 基础地理信息要素分类与编码 ............................................................... .................................. 8 4.3.2 基础地理信息要素分层 ............................................................... ............................................ 11 4.3.3 基础地理信息要素几何特征及表示方法 ............................................................... ............... 12 4.3.4 基础地理信息要素属性 ............................................................... ............................................ 14 4.3.5 基础地理信息要素关联关系 ............................................................... .................................... 15 4.3.6 基础地理信息要素空间关系 ............................................................... .................................... 15 4.4 基础地理信息数据要求 ............................................................... ........................................................ 18 4.4.1 编辑要求 ............................................................... ............................................................... .....18 4.4.2 接边要求 ............................................................... ............................................................... .....19 4.4.3 GIS数据 ............................................................... ............................................................... ......19 4.5 基础地理信息数据管理 ............................................................... ........................................................ 19 4.5.1 图幅管理 ............................................................... ............................................................... .....19 4.5.2 单元管理 ............................................................... ............................................................... .....21 4.6 基础地理信息元数据 ............................................................... ............................................................ 23 4.7 基础地理信息分发 ............................................................... .....................