Function for making basic choropleth maps of shape_file using the tigris package and ggplot
map_shape_file(
shape_file,
crs = "+proj=latlong +ellps=GRS80 +no_defs",
title = "Title of the Shapefile"
)
a shape file based on desired ecological unit (i.e. state, county, block, tract)
the Coordinate reference system, default is crs="+proj=latlong +ellps=GRS80 +no_defs"
the tile of the map
Plots of mapped ecological units desired shape