GIS users are always on the lookout for interesting spatial data. Those who use GIS in education seek data that can be used to teach core concepts in a variety of disciplines. One of the most useful continent-wide spatial data resources is from the North American Environmental Atlas (http://www.cec.org/atlas). It contains data on watersheds, ecoregions, human impact on protected areas, industrial pollution, wetlands, land cover, conservation areas, and base layers including transportation, waterways, and cities. It also contains layers on 17 species of common conservation concern, such as the Burrowing Owl, the Mountain Plover, and the American Black Bear. The atlas was born from collaboration among the national mapping agencies in Canada, the United States, and Mexico, and through the Commission for Environmental Cooperation. Its goal is to provide a foundation to analyze the status of environmental conditions and identify trends across the whole continent.
The atlas is useful because of its rich content, the fact that it is comprised of public domain data, and because you can use it in three different ways. First, you may order up to 5 free paper wall-sized maps from the link on the site. Second, the content is offered as a Web GIS, meaning that you can examine the data interactively with just a web browser, made possible by ArcGIS Server running behind the scenes. What is the relationship between grasslands, rainfall, and elevation? Third, the data from the site is offered as downloadable shapefiles, layer packages, and map documents, ready for ArcGIS desktop. Metadata files are readily available and you can use the web GIS viewer for previewing the data before downloading. Why download the data if you can analyze it online? Both methods are valid approaches to helping students think spatially, but by downloading the data and using it inside ArcGIS desktop, you can dig deeper, analyzing the patterns across space, time, and with spatial statistical techniques. For example, you can assess how much burrowing owl habitat is within 10 kilometers of a pollutant release facility. I also like the atlas because it does not ignore the oceans—marine ecoregions, protected areas, and marine vessel emissions are all included.
What types of analysis will you do with the North American Environmental Atlas?
-Joseph Kerski, Esri Education Manager