中国地质调查局: 全国1∶200 000区域水文地质图空间数据库

全国1∶200 000区域水文地质图空间数据库以建国后在全国范围内(本次未在香港特别行政区、澳门特别行政区和台湾省开展工作) 30个省开展的1∶200 000区域水文地质普查工作所取得的区域水文地质普查报告、综合水文地质图等地质资料为数据源，在制定的“1∶200 000区域水文地质图空间数据库图层及属性文件格式标准”的基础上，建成了一个全国性的、大型的区域水文地质学空间数据库。该数据库总共采集、处理了全国范围内1∶200 000图幅的<number>1 017</number>幅全要素综合水文地质图信息，全部数据量约50 GB。数据库涵盖了以1∶200 000国际标准图幅为管理单位的水文地质要素空间数据图层，内容包括：地理要素(交通层、水系层、行政区划层等)，基础地质要素(地层分区层、断裂构造层)，水文地质要素(地下水类型层、地下水富水性层、地下水迳流模数层，地下水水质层、水文地质特征层、地下水利用规划层)，专题要素(综合水文地质柱状图，水文地质剖面图) 四大类近30个要素图层。空间数据库主要采用MapGIS地理信息系统格式存储，形成了目前国内覆盖范围最广、包含信息最完整的区域水文地质图空间数据库成果，是地质领域全国性最重要的基础信息资源之一。

The national 1:200,000 regional hydrogeological map spatial database takes geological data such as regional hydrogeological survey reports and comprehensive hydrogeological maps obtained from the 1:200,000 regional hydrogeological surveys conducted in 30 provinces across the country (no field work was carried out in Hong Kong Special Administrative Region, Macao Special Administrative Region and Taiwan Province during this campaign) after the founding of the People's Republic of China as its data sources. Based on the formulated "Standard for Layer and Attribute File Format of 1:200,000 Regional Hydrogeological Map Spatial Database", a national, large-scale regional hydrogeological spatial database was established. A total of 1,017 comprehensive hydrogeological map sheets with full elements of 1:200,000 international standard sheets across the country have been collected and processed in this database, with a total data volume of approximately 50 GB. The database covers spatial data layers of hydrogeological elements with 1:200,000 international standard sheets as the management unit, including four categories and nearly 30 feature layers: geographic features (traffic layer, water system layer, administrative division layer, etc.), basic geological features (stratigraphic division layer, fault structure layer), hydrogeological features (groundwater type layer, groundwater abundance layer, groundwater runoff modulus layer, groundwater quality layer, hydrogeological characteristic layer, groundwater utilization planning layer), and thematic features (comprehensive hydrogeological histogram, hydrogeological section map). The spatial database is mainly stored in the MapGIS geographic information system format, forming the regional hydrogeological map spatial database achievements with the widest coverage and most complete information in China at present, and is one of the most important national basic information resources in the geological field.