Greetings
I have a large number of long-lat locations dispersed over the  US and need 
 
to identify which US county that each point is located in  (or nearest to). 
  
After reading the past posts  and Roger's book, I have been able to use the 
overlay function  
to  identify the appropriate counties for the set of  locations 
with  long-lats lying within or on a polygon boundary.   However, due to  
longlat precision errors (I am assuming), some of the  points lie  outside 
all of 
my shapefile's county polygon  boundaries.   

Is there an R function similar to "overlay" that I could use to find  which 
 
county polygon is closest to each of my longlat points that do  not lie  
within the shapefile's polygons?  I have spent quite a  bit of time  
searching 
and browsing past list discussions and can seem  to find my  answer.

My apologies if I have missed an obvious  answer.

Joe          


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