1993. Arizona. State Land Department. This dataset adapted from the map provided "Biotic Communities of the Southwest", August 1980 by David E. Brown and Charles H. Lowe. The datasest s... Arizona State Land Department.
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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).
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).
1993. Arizona. State Land Department. Data layer depicts all rivers and streams. Converted in the fall of 1988 from USGS 1:100,000 scale DLG data to ARC format. Since then, multiple and... Arizona State Land Department.
1993. Arizona. Game and Fish Department. Riparian vegetation associated with perennial waters of Arizona. The dataset was created using two major sources of imagery - Landsat Thematic Mapp... Arizona State Land Department.
1993. Arizona. State Land Department. This statewide data set includes Bureau of Land Management, U.S. Forest Service, National Park Service and Fish & Wildlife Service Riparian Natural... Arizona State Land Department.