DIGITAL FLOOD INSURANCE RATE MAP DATABASE, ANCHORAGE, ALASKA, 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七大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项，此类主题为多数地理信息系统（Geographic Information System，GIS）应用所采用。（注：第七项框架主题……）