I am new to using spatial data in R. So far the tutorials I have seen consist of using
rgdal to open ".shp" files along with ".csv" files to plot the polygons/ points using latitude and longitude.
I have always used ArcGIS and presently have these set of files: US-101.shp, US-101.shx, US-101.dbf and US-101.mxd
I would like to open these files so that I could use the shapefile along with a data frame related to it. I can open the shapefile and also see the table which has "ID", "LAYER", "COLOR", "LINETYPE", "LINEWIDTH" and "ELEVATION" variables.
I am not sure how to use it to plot the shapefile. In ArcGIS the layer is easily visible once I open .mxd file.