Built 046

Structured database in Geomedia Access environment with the polygonal representation of the building extracted from the CTRN 5000 with associated information on height and volumes of buildings. IGM 50000 cut.本数据集为基于Geomedia Access环境构建的结构化数据库，包含从CTRN 5000提取的建筑多边形表达数据，并附带建筑高度与体量的关联属性信息，属于IGM 50000的裁剪版本。