usmap: US maps including Alaska and Hawaii
It is usually difficult or inconvenient to create US maps that include both Alaska and Hawaii in a convenient spot. All map data frames produced by this package use the Albers Equal Area projection.
Map data frames
Alaska and Hawaii have been manually moved to a new location so that
their new coordinates place them to the bottom-left corner of
the map. These maps can be accessed by using the
The function provides the ability to retrieve maps with either
state borders or county borders using the
States (or counties) can be included such that all other states (or counties)
are excluded using the
FIPS lookup tools
Several functions have been included to lookup the US state or county pertaining to a FIPS code.
Likewise a reverse lookup can be done where a FIPS code can be used to retrieve the associated state(s) or county(ies). This can be useful when preparing data to be merged with the map data frame.
Plot US map data
A convenience function
plot_usmap has been included which
takes similar parameters to
us_map and returns a ggplot2
object. Since the output is a
ggplot object, other layers can be
added such as scales, themes, and labels. Including data in the function call
will color the map according to the values in the data, creating a choropleth.
Rudis, Bob. "Moving The Earth (well, Alaska & Hawaii) With R." Blog post. Rud.is., 16 Nov. 2014. Web. 10 Aug. 2015. <https://rud.is/b/2014/11/16/moving-the-earth-well-alaska-hawaii-with-r/>.