You are here

About the Long Term Archive

Picture of the EROS Data Center located northeast of Sioux Falls, SD.

The U.S. Geological Survey's (USGS) Long Term Archive (LTA) at the National Center for Earth Resource Observations and Science (EROS) in Sioux Falls, SD is one of the largest civilian remote sensing data archives. It contains a comprehensive record of the Earth's changing land surface. Scientists from around the world depend on this archive to conduct research on changes that affect our environment, resources, health, and safety. Time series images are a valuable resource for scientists, disaster managers, engineers, educators, and the general public. USGS EROS has archived, managed, and preserved land remote sensing data for more than 35 years and is a leader in preserving land remote sensing imagery. USGS EROS has a mandate to provide access and data preservation support for its land remote sensing data archive.

The U.S. Geological Survey (USGS) National Center for Earth Resource Observations and Science (EROS) initially operated in an office in downtown Sioux Falls, South Dakota that opened on September 28, 1971. The Karl E. Mundt Federal Building is located in the countryside about 15 miles northeast of Sioux Falls. Built to exclusively support the activities of EROS, the building was officially dedicated on August 7, 1973. NASA and USGS announced on August 28,1990 that EROS would process, archive and distribute land processes data received from EOS satellites, thus establishing a Distributed Active Archive Center, or DAAC. A 65,000 square-foot addition to the building was constructed to support this new role, and was dedicated on August 19, 1996.