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The North American Environmental Atlas is a set of maps and GIS data layers of North America, brought together by national geologic, natural resources, and geographic agencies in Canada, Mexico, and the United States, that enables the effective visualization of North American environmental information within the context of the continent.
The project is an ongoing collaboration between Natural Resources Canada, the Instituto Nacional de Estadística y Geografía (INEGI-National Institute of Statistics and Geography), and the United States Geological Survey (USGS), and the Commission for Environmental Cooperation (CEC) to: "enhance awareness of environmental topics of continental scale, add value to other CEC projects, provide a framework for geo-referenced environmental data, and build networks among partner mapping organizations through collaboration on harmonized map layers of mutual interest."
Print maps are available directly from the site. GIS data layers (raster and vector) are available from the CEC Data Files site. The data files are separated by category: base layers, Ecosytems and Land Cover, Protection of Species and Areas, Pollution and Waste, and Human Influence.