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2014. Geological Survey (U.S.). This line shapefile shows elevation contour lines for Alaska. The map layer was derived from the 100-meter resolution elevation data set which is p... National Atlas of the United States.
2014. Geological Survey (U.S.). This line shapefile shows elevation contour lines for Hawaii. The map layer was derived from the 100-meter resolution elevation data set which is p... National Atlas of the United States.
2014. Geological Survey (U.S.). This line shapefile shows elevation contour lines for Puerto Rico and the U.S. Virgin Islands. The map layer was derived from the 100-meter resolut... National Atlas of the United States.
2014. Geological Survey (U.S.). This line shapefile shows elevation contour lines for the conterminous United States. The map layer was derived from the 100-meter resolution eleva... National Atlas of the United States.
2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, and 2014. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between fall 2004 and fall 20... California. Department of Water Resources.
2009, 2010, 2011, 2012, 2013, and 2014. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between fall 2009 and fall 20... California. Department of Water Resources.
2010, 2011, 2012, 2013, 2014, and 2015. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between fall 2010 and fall 20... California. Department of Water Resources.
2011, 2012, 2013, and 2014. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between fall 2011 and fall 20... California. Department of Water Resources.
2012, 2013, 2014, and 2015. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between fall 2012 and fall 20... California. Department of Water Resources.
2013 and 2014. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between fall 2013 and fall 20... California. Department of Water Resources.