2011. Vanderbilt Engineering Center for Transportation Operations and Research, Waterborne Commerce Statistics Center (U.S.), and United States. Bureau of Transportation Statistics. The National Waterway Network is comprised of a link database and a node database. Links are line strings, which consist of beginning and end point... United States. Bureau of Transportation Statistics.
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2011. Vanderbilt Engineering Center for Transportation Operations and Research, United States. Bureau of Transportation Statistics, and Waterborne Commerce Statistics Center (U.S.). The National Waterway Network is comprised of a link database and a node database. Links are line strings, which consist of beginning and end point... United States. Bureau of Transportation Statistics.
2011. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polyline shapefile depicts hydro coverages that were created using TIGER/Line 2000 shapefile data gathered from ESRI's Geography Network. The ... United States. Bureau of Transportation Statistics.
2011. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polygon shapefile depicts hydrography coverages that were created using TIGER/Line 2000 shapefile data gathered from ESRI's Geography Network.... United States. Bureau of Transportation Statistics.
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.
2010, 2011, 2012, and 2013. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between spring 2010 and sprin... California. Department of Water Resources.
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 spring 2004 and sprin... California. Department of Water Resources.
2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, and 2012. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between spring 2002 and sprin... 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.
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 spring 2005 and sprin... California. Department of Water Resources.