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1996. This polygon shapefile contains ice observations in the Arctic region for September 9, 1996. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for September 9, 1997. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for September 9, 1998. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for September 9, 1999. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2002. This polygon shapefile contains ice observations in the Arctic region for September 9, 2002. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2004. California. Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). The California Air Basins layer is a polygon shapefile coverage representing the 15 California air basins, as defined in state statute and regulati... California. Air Resources Board.
2004. California Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). The California Air Districts layer is a polygon shapefile coverage representing the California air pollution control and air quality management dis... California. Air Resources Board.
2008, 2009, 2010, and 2011. California. Air Resources Board. Planning and Technical Support Division and United States. Environmental Protection Agency. This polygon shapefile contains area designations of carbon monoxide (CO) levels in California as required under Health and Safety Code section 396... California. Air Resources Board.
2020. Dadap, Nathan. This polygon shapefile is an index to the Drainage Canals in Southeast Asian Peatland dataset. Stanford Digital Repository.
2003. California Office of Statewide Health Planning and Development. This polygon shapefile displays federal Nitrogen Oxide (NO2), Sulfur Dioxide (SO2), and Carbon Monoxide (CO) area designations contained in 40CFR81... California. Air Resources Board.