SGP Data: http://daac.gsfc.nasa.gov/CAMPAIGN_DOCS/SGP97/sgp97.html
CAGEX Home Page: http://snowdog.larc.nasa.gov:8081/cagex.html
60 m DEM of Oklahoma: http://www.seic.okstate.edu/gis/usgs/okdem/okdem2.html
Various scale DEMs available from the USGS: http://edcwww.cr.usgs.gov/nsdi/gendem.htm
NRCS soils page: http://www.ftw.nrcs.usda.gov/soils_data.html
Southern Great Plains Hydrology Experiment: http://hydrolab/arsusda.gov/sgp97/explan/section1.html
NRCS -- Oklahoma: http://www.ok.nrcs.usda.gov/
USGS Landuse/Landcover Data : http://nsdi.usgs.gov/nsdi/products/lulc.html
North American Land Cover characteristics: http://edcwww.cr.usgs.gov/landdaac/glcc/nadoc.html
Remote Sensing Research at USDA, ARC, and BARC: http://hydrolab.arsusda.gov/RSatBARC/rsatbarc.html
Point Precipitation in Hydrologic Modeling: http://info.abrfc.noaa.gov/map/map.html
Arkansas-Red River Basin Forecast Center: http://info.abrfc.noaa.gov/
Oklahoma Mesonet: http://geowww.gcn.ou.edu/WWW/Mesonet/Mesonet.html
USGS Water Data: http://water.usgs.gov
Penn State Earth System Science Center Database: http://dbwww.essc.psu.edu
Canadian Soil Information System (CanSIS): http://res.agr.ca/CANSIS/
Climate Systems Modeling Land Working Group: http://www.cgd.ucar.edu/cgi-bin/hn/get/LWG.html
Arm Meta Data System: http://www.db.arm.gov/MDS/