Earth Resources Observation Systems (EROS) Data Center (EDC)

<http://edc.usgs.gov>

USGS

Cartographic and land remote-sensing data products

National Earthquake Information Center (NEIC)

<http://neic.usgs.gov>

USGS

Earthquake information, seismograms

National Climatic Data Center (NCDC)

<http://lwf.ncdc.noaa.gov/oa/ncdc.html>

NOAA

Climate, meteorology, alpine environments, ocean-atmosphere interactions, vegetation, paleoclimatology

National Geophysical Data Center (NGDC)

<http://www.ngdc.noaa.gov/ngdc.html>

NOAA

Bathymetry, topography, geomagnetism, habitat, hazards, marine geophysics

National Oceanographic Data Center (NODC)

<http://www.nodc.noaa.gov>

NOAA

Physical, chemical, and biological oceanographic data

National Snow and Ice Data Center (NSIDC)

<http://nsidc.org>

NOAA

Snow, land ice, sea ice, atmosphere, biosphere, hydrosphere

National Space Science Data Center (NSSDC)

<http://nssdc.gsfc.nasa.gov>

NASA

Astronomy, astrophysics, solar and space physics, lunar and planetary science

Oak Ridge National Laboratory (ORNL) DAAC

http://www-eosdis.ornl.gov

NASA

Terrestrial biogeochemistry, ecosystem dynamics

Socioeconomic Data and Applications Center (SEDAC)

<http://sedac.ciesin.org>

NASA

Population and administrative boundaries

Land Processes (EDC) DAAC <http://edcdaac.usgs.gov/landdaac/main.html>

NASA

Land remote sensing imagery, elevation, land cover