NCGIA research projects have resulted in the compilation of useful digital datasets which are available in the public domain. More information on each of these is available by following the links indicated.
Alexandria Digital Library Project
SPHEREKIT: The Spatial Interpolation Tool
National Center for Ecological Analysis & Synthesis
The Global Demography Project
Spatial Evacuation Analysis Project Tom Cova & Richard Church
Modeling Elevation Uncertainty Using Stochastic Simulation Chuck Ehlschlaeger & Ashton Shortridge
Encapsulating Simulation Models with Geospatial Datasets Michael Goodchild, Ashton Shortridge & Pete Fohl
The Influence of Data Aggregation on the Stability of Location Model Solutions Alan Murray & Jon Gottsegen
Population Related Activities Uwe Deichmann
Uncertainty in Geospatial Information Representation, Analysis, & Decision Support Daniel Montello, et al.
The California Gap Analysis Program Frank Davis, David Stoms, Michael Bueno, Allan Hollander & Joe Walsh