Digital Topographic Map iB1000

The i-Series Digital Maps, including iB1000, iB5000, iB10000 and iB20000 Digital Topographic Map, iC1000 Digital Land Boundary Map and iG1000 Geo-reference Database, provide more comprehensive datasets in new data formats and enable users to select the seamless version covering users’ defined area-of-interest so that they do not need to combine discrete tiles of digital maps into one single file for their work. The Digital map detail is represented as single coordinated points, or lines of multiple coordinated points. Coordinates of the Digital Map are in Hong Kong 1980 Grid, and heights are in metres above the Hong Kong Principal Datum.

i系列数字地图（i-Series Digital Maps）涵盖iB1000、iB5000、iB10000及iB20000数字地形图、iC1000土地边界图，以及iG1000地理参考数据库（Geo-reference Database）。该产品提供采用新型数据格式的更全面数据集，支持用户选取覆盖其自定义感兴趣区域的无缝版本，无需将零散的数字地图瓦片拼接为单个文件即可开展工作。数字地图的细节以单个坐标点或多坐标点连线的形式进行表达，其坐标采用香港1980坐标系（Hong Kong 1980 Grid），高程单位为香港基准面（Hong Kong Principal Datum）以上的米数。