# ADM0_A3 GEOU_DIF GEOUNIT GU_A3 SU_DIF SUBUNIT SU_A3 BRK_DIFF NAME NAME_LONG BRK_A3

# 5 3 Admin-0 country 6 Finland FI1 1 2 Country Aland # 4 0 Admin-0 country 6 Albania ALB 0 2 Sovereign country Albania # 3 3 Admin-0 country 6 United Kingdom GB1 1 2 Dependency Anguilla # 2 0 Admin-0 country 3 Angola AGO 0 2 Sovereign country Angola # 1 0 Admin-0 country 3 Afghanistan AFG 0 2 Sovereign country Afghanistan # 0 3 Admin-0 country 5 Netherlands NL1 1 2 Country Aruba Head(admin0_poly) # scalerank featurecla LABELRANK SOVEREIGNT SOV_A3 ADM0_DIF LEVEL TYPE ADMIN Take a look at the admin1_poly dataframe, to figure out the codes for Candadian and U.S. Layer <- ogrListLayers(coast_shapefile) ogrInfo(coast_shapefile, layer=layer) coast_lines <- readOGR(coast_shapefile, layer=layer) summary(coast_lines) plot(coast_lines) layer <- ogrListLayers(admin0_shapefile) ogrInfo(admin0_shapefile, layer=layer) admin0_poly <- readOGR(admin0_shapefile, layer=layer) summary(admin0_poly) plot(admin0_poly, bor= 'gray', add= TRUE) layer <- ogrListLayers(admin1_shapefile) ogrInfo(admin1_shapefile, layer=layer) admin1_poly <- readOGR(admin1_shapefile, layer=layer) summary(admin1_poly) plot(admin1_poly, bor= 'lightgreen', add= TRUE) layer <- ogrListLayers(lakes_shapefile) ogrInfo(lakes_shapefile, layer=layer) lakes_poly <- readOGR(lakes_shapefile, layer=layer) summary(lakes_poly) plot(lakes_poly, bor= 'lightblue', add= TRUE) lrglakes_poly <- lakes_poly plot(lrglakes_poly, bor= 'purple', add= TRUE)

Reading cdf files r