NEW YORK STATE
New York State GIS Clearinghouse
Note that some layers are free to download. Others must be requested through the Map and Data Library. All roads can be found for public use at this url http://gis.ny.gov/gisdata/inventories/details.cfm?DSID=932
Great Lakes Monthly Hydrologic Data
Accurate hydrologic data (over-lake precipitation, runoff, lake evaporation, net basin supplies, connecting channel flows, diversion flows, beginning-of-month lake levels, and changes in storage) are required for simulation, forecasting, and water resource studies on the Laurentian Great Lakes an
Clearinghouse Node for New York State, Cornell University
online repository in the National Spatial Data Clearinghouse program.
Two Countries One Forest Conservation Data
2C1Forest is a major Canadian-U.S. collaborative of 50 conservation organizations, researchers, and foundations working to conserve and restore the forests and natural heritage of the Northern Appalachian Acadian ecoregion.