Data Sources for New York State
Cornell University's Geospatial Information Repository
"CUGIR is an active online repository providing 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."
New York State GIS Clearinghouse
The Clearinghouse provides a repository for data and metadata resources and an extensive collection of downloadable data.
Datasets of the NYS Museum
A good source for statewide bedrock and surficial geology data in New York. There are also links to historical USGS maps for New England.
NYS Geography and Mapping, NYS Data Center
The New York State Data Center's Geography and Mapping site provides interactive query access to geographic boundary files, Census attribute data for various levels of statistical and political geography, and predefined thematic maps illustrating various economic and demographic characteristics of the population.
The one stop shop for Federal, State and Local GIS data provided by the Federal Government.
The National Map Viewer
"The National Map is a consistent framework for geographic knowledge needed by the Nation. It provides public access to high-quality, geospatial data and information from multiple partners to help support decision making by resource managers and the public." The geographic information available from The National Map includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover.
US Geological Survey Seamless Data Distribution System
Select and download Digital Elevation Models (DEM’s), Land Use grids, ortho-imagery and many other datasets using an interactive mapserver. With US and international data available, "The Seamless Data Distribution System (SDDS) is the ultimate location to explore and retrieve data."
The next generation of digital topographic maps from the USGS. Arranged in the traditional 7.5-minute quadrangle format, digital US Topo maps are designed to look and feel like the traditional paper topographic maps. Users can turn geographic data layers on and off; zoom in and out to highlight specific features or see a broader context; and print the maps, in their entirety or in customized sections, on a wide variety of printing devices.
UN Environmental GeoData Portal
A source for data sets used by UNEP and its partners in the Global Environment Outlook (GEO) report. The online database contains national, subregional, regional and global statistics and geospatial data sets (maps), covering themes like Freshwater, Population, Forests, Emissions, Climate, Disasters, Health and GDP. Display them on-the-fly as maps, graphs, data tables or download the data in different formats."
Global Land Cover Facility
The GLCF is “ the best open source for Landsat TM and Landsat ETM data on the planet”. And it's free....
Perry-Castañeda Library Map Collection
The University of Texas' extensive collection of printable maps - both modern and historical.
United Nations Cartographic Section
More than 100 General Maps are currently available. Includes general maps, peacekeeping maps and various thematic maps. Most are in PDF format.
David Rumsey Map Collection
The David Rumsey Historical Map Collection has over 10,000 maps online. The collection focuses on rare 18th and 19th century North and South America maps and other cartographic materials.
A to Z Maps
This is also the worlds largest subscription-based database of proprietary, royalty-free world, continent, country, and state maps. Included in the 145,000+ maps are: political maps, physical maps, outline maps, population maps, precipitation maps, climate maps, and other thematic maps. GIS data for states, countries, and global levels are also available in shapefile, e00, and mdb formats.
St. Lawrence County OpenGeo Portal
The SLC OpenGeoPortal is an interactive web viewer for the county using basemap layers from Google, Bing, Yahoo, OSM, ESRI, USGS, NYSDOP and local layers including Tax Parcels, Soils, Wetlands, School Districts, Voting Districts & more. Data are available for download as WMS, WFS, ESRI shape files, KML and KMZ files. Uploads of KML files allow users to create their own mashups.
National Atlas of the United States
The National Atlas of the United States® is intended to provide a comprehensive, map-like view into the enormous wealth of data collected by the Federal Government.
National Geographic's Maps and Geography WWW Site
Interactive maps of anywhere on the planet.
An online way to create maps. Access free high quality ready-to-use base maps, apps, and tools published by Esri and other GIS users, and share your own content with a broad community of users. Map services can be used with ArcGIS 9.3.1 and higher
Freely downloadable from NASA's website, Worldwind offers 3D global coverage of current satellite imagery and many other layers.
Freely downloadable from Google, this software also provides global coverage of satellite and aerial imagery with 3D views.
Environmental Systems Research Institute - ESRI
The world leader in GIS development. Their support page is a great resource if you are having problems with ESRI software.
Erdas Imagine Support - Leica Geosystems
For support with Erdas Imagine 8.7 click on the support tab.
Remote Sensing Geographic Information Systems Facility
Sponsored by the American Museum of Natural History and its Center for Biodiversity and Conservation, this site has an excellent introduction to Remote Sensing.