Metropolitan divisions are subdivisions of metropolitan areas with population of at least 2.5 million. Please note: not all metropolitan areas have metropolitan divisions.
metro_divisions(year = NULL, ...)The data year (defaults to 2017).
arguments to be passed to the underlying `load_tiger` function, which is not exported.
Options include class, which can be set to "sp" (the default) or "sf" to
request sp or sf class objects, and refresh, which specifies whether or
not to re-download shapefiles (defaults to FALSE).
http://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2015/TGRSHP2015_TechDoc.pdf
Other metro area functions: combined_statistical_areas,
core_based_statistical_areas,
new_england, urban_areas