China National Digital Geological Map (Public Version at 1∶200 000 Scale) Spatial Database

As the only one of its kind, China National Digital Geological Map (Public Version

at 1:200 000 scale) Spatial Database (CNDGM-PVSD) is based on China’s former nationwide measured results of regional geological survey at 1:200 000 scale, and is also one of the nationwide basic geosciences spatial databases jointly accomplished by multiple organizations of China. Spatially, it embraces 1 163 geological map-sheets (at scale 1:200 000) in both formats of MapGIS and ArcGIS, covering 72% of China’s whole territory with a total data volume of 90GB. Its main sources is from 1:200 000 regional geological survey reports, geological maps, and mineral resources maps with an original time span from mid-1950s to early 1990s. Approved by the State’s related agencies, it meets all the related technical qualification requirements and standards issued by China Geological Survey in data integrity, logic consistency, location accuracy, attribution fineness, and collation precision, and is hence of excellent and reliable quality. The CNDGM-PVSD is an important component of China’s national spatial database categories, serving as a spatial digital platform for the information construction of the State’s national economy, and providing information backbones to the national and provincial economic planning, geohazard monitoring, geological survey, mineral resources exploration as well as macro decision-making.

作为全球同类成果中唯一的此类数据集，中国国家1:20万比例尺公开版数字地质图空间数据库（CNDGM-PVSD）以中国既往全国范围1:20万比例尺区域地质调查实测成果为基础，同时也是中国多单位联合建成的全国基础地学空间数据库之一。
该数据库空间上包含1163幅1:20万比例尺地质图幅，支持MapGIS与ArcGIS两种格式，覆盖中国全域72%的国土面积，总数据量达90GB。
其数据主要源自1:20万比例尺区域地质调查报告、地质图件与矿产资源图件，原始数据采集时间跨度为20世纪50年代中期至90年代初期。
该数据库经国家相关主管部门审批，在数据完整性、逻辑一致性、位置精度、属性细粒度与整饰精度方面均符合中国地质调查局发布的全部相关技术规范与标准，因此具备优异且可靠的质量。
CNDGM-PVSD是中国国家空间数据库体系的重要组成部分，可为国家国民经济信息化建设提供空间数字化支撑平台，并为全国及省级经济规划、地质灾害监测、地质调查、矿产资源勘探以及宏观决策提供核心信息支撑。