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

online repository in the National Spatial Data Clearinghouse program. CUGIR provides geospatial data and metadata for New York State, with special emphasis on those natural features relevant to agriculture, ecology, natural resources, and human-environment interactions.In order to provide the best possible access to geospatial data for New York State, CUGIR coordinates its activities with those of the New York State GIS Clearinghouse.

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 and their basins. These data are derived from meteorological and hydrological data. The 1993 reference is an update of the earlier report describing Great Lakes monthly hydrologic data. It was expanded and revised to include all available data through 1990 and to reflect improved computational techniques. The raw data utilized were collected from several sources, so the periods of record for each lake vary.

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. From their website: Use and reproduction of this data is authorized for educational or other non-commercial purposes without prior permission from the copyright holders. You may make as many copies of the data as you wish, give exact copies of the original data to anyone, and distribute the data in its unmodified form via electronic means. There is no charge for any of the above. You are specifically prohibited from charging, or requesting donation, for any such copies (however made), from publishing, and/or from distributing the data with other products (commercial or otherwise) without prior written permission.