Hi everyone.
I'm using maptools (readShapePoints) to read some shapefiles. However, when I try proj4string(myshp) it returns me NA. I opened the shapefile in QGIS and ArcGIS to ensure there was a projection associated to the file.
I was wondering if there was a way to retrieve the projection of a shapefile? 
Thank in advance,Phil 		 	   		  
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