General Resources:
- Ancient Cross Timbers Consortium for Research Education and Conservation
- Lamont-Doherty Earth Observatory Tree-Ring Lab
- Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology / Peter Ian Kuniholm
- Scripps Institution of Oceanography Climate Research Division
- Ultimate Tree-Ring Pages
- University of Arizona Laboratory of Tree-Ring Research
- University of Arkansas Center for Advanced Spatial Technology
- University of Arkansas Department of Geosciences
- University of Arkansas Environmental Dynamics Program
- University of East Anglia Climatic Research Unit
Geospatial Data Resources:
- Arkansas: Arkansas GIS Office
- Arkansas: Arkansas Wetland Resource Information Management System
- California: California Spatial Information Library
- Kansas: Kansas Geospatial Community Commons
- Kansas: Kansas Applied Remote Sensing Program
- Mexico: Instituto Nacional de Estadistica Geographia e Informatica
- Natural Resources Conservation Service
- Oklahoma: Oklahoma Center for Geospatial Information
- Oklahoma: Geo Information Systems
- South Carolina: SC Department of Natural Resources Data Clearinghouse
- Texas: Texas Natural Resource Information System
- USGS: National Elevation Dataset DEMs
- USGS: E.L. Little Tree Species Distributions