Etats-Unis d'Amérique
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Sustaining Seven Billion People : Image of the Day
With seven billion people now living on Earth, the ever growing demand is putting unprecedented pressure on global resources—especially forests, water, and food.
Welcome to SABINS | SABINS
The School Attendance Boundary Information System (SABINS) provides, free of charge, aggregate census data and GIS-compatible boundary files for school attendance areas, or school catchment areas, for selected areas in the United States for the 2009-2010 school year.
The National Historical Geographic Information System (NHGIS) provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2010.
Welcome to NHGIS | NHGIS
Data.gov
Are you a teacher, professor, or student? Young people across America are learning about Data.gov and we want you to be part of getting data into the classroom.
CCE - Atlas environnemental de l'Amérique du Nord: Fichiers de données
A new publication from the World Resources A new map from NASA reveals the distribution of carbon stored in the tropical forests of over 75 countries, covering about 2.5 million hectares of forests.
The map is a seamless, binational 1:5,000,000-scale geologic map of the entire U.S.
U.S. - Mexico Border Environmental Health Initiative
there are beautiful color Orthoimagery for most the western and central counties (but not NYC), and false-color (CIR) image for nearly the whole state, excepting parts of NYC
New York City
Beyond what's going on at Harvard, many other centers around the country and world are doing interesting work in the field of GIS.
Public Data Resources § Center for Geographic Analysis, Harvard University
Welcome to NHGIS — National Historical Geographic Information System
The National Historical Geographic Information System (NHGIS) provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2010.
SGIS - Orthoimagery - Web Map Service
GIS web services allow users to connect to data sources through the internet rather than downloading and storing copies of the data on their own systems.Nearly all data available in the National Atlas Map Maker can be downloaded at no cost. This raw data and its most up-to-date documentation is accessible from the index below. This index lists all of the map layers currently contained in nationalatlas.gov™, by broad subject categories that correspond to the chapters of the National Atlas.