GeoData @ UCB

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1. World Port Index 2014

2014. Digital Social Science Center (DSSC), Columbia University Libraries and United States. National Imagery and Mapping Agency. World Port Index 2014 is a point theme representing port facilities worldwide. This dataset was derived from the 23rd Edition of the World Port Ind... National Imagery and Mapping Agency.

2. United States Major Ports, 2013

2013. United States. Bureau of Transportation Statistics. The ports are politically defined by port limits or Corps projects, excluding non-Corps projects not authorized for publication. The determination ... Research and Innovative Technology Administration/Bureau of Transportation Statistics.

3. World Port Index 2012

2012. Digital Social Science Center (DSSC), Columbia University Libraries and United States. National Imagery and Mapping Agency. World Port Index 2012 is a point theme representing port facilities worldwide. This dataset was derived from the 22nd Edition of the World Port Ind... National Imagery and Mapping Agency.