 
Good Afternoon
Does R have the ability to let me have access to the gridded data values  
for the following data?
We downloaded the zipped file containing the data sets but are not familiar 
 with how to read the data in R.
 
Thanks 
Joe
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Description on data web page:
Travel time to major cities: A global map of  Accessibility
The data are in geographic projection with a resolution  of 30 arc seconds. 
The format is integer ESRITM GRID format with  pixel values representing 
minutes of travel time. The files are stored in a zip  archive. The archive 
also contains an ESRITM Shapefile of the  populated places. Other files 
include Metadata (XML), and ArcView 3 Projects and  Legends (APR and AVL). 
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