VMap0 (1:1,000,000) topographic data for Southern Europe and North Africa

The Vector Map (VMap) Level 0 database represents the fifth edition of the Digital Chart of the World. The third/fourth edition was published in 199701. The product is dual named to show its lineage to the original DCW, published in 1992, while positioning the revised product within a broader family of VMap products. VMap Level 0 (VMap0) is a comprehensive 1:1,000,000 scale vector basemap of the world. It consists of cartographic, attribute, and textual data stored on compact disc read only memory (CDROM). The primary source for the database is the National Imagery and Mapping Agency's (NIMA) Operational Navigation Chart (ONC) series. This is the largest scale unclassified map series in existence that provides consistent, continuous global coverage of essential basemap features. The database contains more than 1,900 megabytes of vector data and is organized into 10 thematic layers. The data include major road and rail networks, major hydrologic drainage systems, major utility networks (cross-country pipelines and communication lines), all major airports, elevation contours (metric equivalent of 1000 foot (ft), with 500ft and 250ft supplemental contours), coastlines, international and first order boundaries and populated places. This dataset contains data from the eurasia CD and covers south/western Europe and North Africa. Purpose: The VMap0 is a general purpose global database designed to support Geographic Information Systems applications. This dataset was downloaded as VMap Level 0 data from the NGA 'geoengine' website using the NGA Raster Roam tool (http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html). The VMap data was loaded into CadCorp MapModeller and exported as Shapefiles using CadCorp. The field names were edited in ArcMap to remove spaces. The specification of the data and other metadata are included in the Zip file in the Metadata folder. The data is in the WGS 84 coordinate system. GIS vector data. This dataset was first accessioned in the EDINA ShareGeo Open repository on 2010-06-30 and migrated to Edinburgh DataShare on 2017-02-21.

矢量地图（Vector Map, VMap）0级数据库是世界数字地图（Digital Chart of the World, DCW）的第五版。其第三/四版于1997年1月发布。该产品采用双重命名方式，既体现其溯源至1992年发布的初代世界数字地图（DCW），又将该修订版纳入更广泛的VMap产品体系之中。

VMap 0级（VMap0）是一套覆盖全球的1:100万比例尺矢量底图数据集，其数据以制图数据、属性数据和文本数据的形式存储于只读光盘（Compact Disc Read-Only Memory, CD-ROM）中。该数据库的核心数据源为美国国家影像与制图局（National Imagery and Mapping Agency, NIMA）的作业航海图（Operational Navigation Chart, ONC）系列，该系列是目前现存比例尺最大的非保密地图集，可为全球核心底图要素提供统一且连续的覆盖范围。

该数据库包含超过1900兆字节的矢量数据，共分为10个专题图层。数据涵盖主要道路与铁路网、主干水文排水系统、大型公用设施网络（跨国管道与通信线路）、所有大型机场、高程等高线（等高距等效于1000英尺，辅以500英尺与250英尺的补充等高线）、海岸线、国界与一级行政界线以及居民地。本数据集取自欧亚光盘数据，覆盖南欧、西欧以及北非地区。

用途：VMap0是一款通用型全球数据库，专为支撑地理信息系统（Geographic Information Systems, GIS）应用而设计。本数据集通过NGA栅格漫游工具（NGA Raster Roam）从NGA的"geoengine"官方网站下载获取，下载地址为http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html。VMap数据被导入CadCorp MapModeller软件，并通过CadCorp相关工具导出为Shapefile格式；后续在ArcMap软件中对字段名称进行编辑，移除了其中的空格字符。数据集规范及其他元数据均包含于Metadata文件夹内的压缩文件中。本数据集采用WGS 84坐标系，属于GIS矢量数据。本数据集于2010年6月30日首次存入EDINA ShareGeo Open仓储库，并于2017年2月21日迁移至Edinburgh DataShare平台。