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1. World Map Background

1996. Environmental Systems Research Institute (Redlands, Calif.). THis polygon shapefile represents grid cells of 30 by 30 degrees that cover the world. This layer is part of the 2014 ESRI Data and Maps collection... Environmental Systems Research Institute (Redlands, Calif.).

2. World Map Background 2008

1996. ESRI. World Map Background represents grid cells of 30 by 30 degrees that cover the world. ESRI.