1:25万全国基础地理数据

全国1：25万公众版基础地理数据覆盖全国陆地范围和包括台湾岛、海南岛、钓鱼岛、南海诸岛在内的主要岛屿及其临近海域，共816幅。地理空间参考采用2000国家大地坐标系，1985国家高程基准，经纬度坐标。整套数据通过地图保密技术进行了空间位置精度和属性内容的保密技术处理，其空间位置精度和属性内容符合《公开地图内容表示若干规定》《公开地图内容表示补充规定》和《基础地理信息公开表示内容的规定》。  在保证国家安全的前提下，积极促进基础测绘成果的社会化应用，以满足社会公众对基础地理数据日益旺盛的需求。经自然资源部批准，“全国地理信息资源目录服务系统”现提供部分1:25万免费数据下载服务，并保持数据版本持续更新。目前，下载数据采用1：25万标准图幅提供，整体现势性为2015年；图层内容含水系（点、线、面层），公路、铁路（线层），居民地（点、面层），居民地地名（注记点），自然地名（注记点）等9类要素层。

National 1:250,000 Public Version Basic Geographic Data covers the entire terrestrial territory of China, as well as major islands including Taiwan Island, Hainan Island, Diaoyu Island, and the South China Sea Islands and their adjacent waters, totaling 816 map sheets. The geospatial reference adopts the 2000 National Geodetic Coordinate System, the 1985 National Elevation Datum, and geographic coordinates. The full dataset has undergone confidentiality processing for both spatial positional accuracy and attribute content via map confidentiality technologies, and its spatial positional accuracy and attribute content comply with the "Several Provisions on the Representation of Public Map Content", "Supplementary Provisions on the Representation of Public Map Content", and "Provisions on Publicly Represented Contents of Basic Geographic Information".

On the premise of ensuring national security, this dataset actively promotes the social application of basic surveying and mapping achievements to meet the increasingly vigorous demand for basic geographic data from the general public. Approved by the Ministry of Natural Resources, the "National Geographic Information Resource Catalog Service System" now provides free download services for part of the 1:250,000 data, and maintains continuous updates of the data version. Currently, the downloaded data is provided in 1:250,000 standard map sheets, with an overall data currency of 2015. The layer contents include 9 categories of feature layers, such as hydrological systems (point, line, and polygon layers), highways and railways (line layers), residential areas (point and polygon layers), residential place name annotation points, and natural place name annotation points.

搜集汇总

背景与挑战

背景概述

1:25万全国基础地理数据覆盖全国陆地范围和主要岛屿及其临近海域，共816幅，采用2000国家大地坐标系和1985国家高程基准。数据内容包括水系、居民地、交通、地名及注记等9类要素层，数据分层命名规则明确，便于用户使用。