ggplot2
tmap layer for state of Texas.
tmap_tx
tmap
Transformed version of spdf_tx, where tmap::tm_polygons(col = "white", alpha = 0) has been called after conversion to a tmap object (via tmap::tm_shape(spdf_tx)).
spdf_tx
tmap::tm_polygons(col = "white", alpha = 0)
tmap::tm_shape(spdf_tx)
https://mgimond.github.io/Spatial/interpolation-in-r.html