The Global Fiducials Library (GFL) is a long-term archive of images from U.S. National Imagery Systems which represents a long-term periodic record for selected scientifically...

NASA Open Data Portal00

USGS Global Fiducials

The Global Fiducials Library (GFL) is a long-term archive of images from U.S. National Imagery Systems which represents a long-term periodic record for selected scientifically important sites. The GFL

data.nasa.gov2019-09-20 更新71

USGS Global Fiducials Library: 1999-2009

A Fiducial site is a geographic location that is used as a benchmark for the long-term monitoring of processes, both natural and anthropogenic, associated with the causes and effects of global environ

DataONE2016-10-29 更新50