Datasets Online

General Atmosphere Ocean Land Maps

General
NASA - Distributed Active Archive Centers (DAACs)
NASA - EOS Pathfinder Data Sets
NOAA Data Set Catalog
Atmosphere
NOAA NIC
NOAA - National Climate Data Center (NCDC)
NASA - Remote Sensing Data (RSD)
WMO Global Precipitation Climatology Centre
Ocean
U.Del - Ocean Information Center (OCEANIC)
Land
NOAA - National Geophysical Data Center (NGDC)
Home Page for Global Soils Information Systems
USGS GeoData
Software
USGS - Global Land Information System (GLIS)
ISLSCP Initiative I Data Collection
Maps and Map Data
USGS Cartographic Data
Xerox PARC Map Viewer
US Census - Tiger Maping Service