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1. Level III Ecoregions, Arizona, 2013
2013. US Environmental Protection Agency. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to... U.S. EPA Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL).
2. Level IV Ecoregions, Arizona, 2013
2013. US Environmental Protection Agency. Ecoregions by state were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the typ... U.S. EPA Office of Research and Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL).
3. Quadrangle Boundaries, Arizona, 2002
2002. Arizona. State Land Department. Index Grids, This statewide data set consists of polygons representing the 1:250,000 USGS Quad boundaries spanning Arizona. The Lat/Long grid has a... Arizona State Land Department.
4. Voter Precincts, Arizona, 2018
2018. University of Arizona Libraries. This dataset is statewide coverage based on a compilation of County voter precinct layers obtained from a variety of sources. Detailed by county he... University of Arizona. Library.