BASEMAP, CROOK COUNTY, OREGON, USA

FEMA Framework Basemap datasets comprise six of the seven FGDC themes of geospatial data that are used by most GIS applications (Note: the seventh framework theme,...联邦紧急事务管理局（Federal Emergency Management Agency，FEMA）框架底图数据集涵盖了绝大多数地理信息系统（Geographic Information System, GIS）应用所通用的七类联邦地理数据委员会（Federal Geographic Data Committee, FGDC）地理空间数据主题中的六类（注：第七类框架主题……）