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• Installation
• Features
• Examples
• Contributing

Ideas

• Merge data with map for plotting
  • Include vignette with example plots
• Include more map projections
• Replace data frame names lat and long with something else since they don't really represent latitude and longitude (for non-Mercator projections)
  • Perhaps x and y should be sufficient
• Allow specifying whether data values are discrete or continuous, i.e.

  plot_usmap(data = df, ..., value.type = c("continuous", "discrete"))

• Standardize function names since usmap's API is intended to be small, lightweight, and easy to navigate.
  • For example: usmap_data, usmap_plot, usmap_join, usmap_fips, usmap_fips_info, etc.
• Add vectorized version of fips(…)
• Implement specific usmap class (or similar name) for greater functionality (extending S3 methods from other packages).
• Add ability to exclude certain states/counties from the map (opposite of include).

  us_map(exclude = c("Alaska", "Hawaii"))    # you monster!

• Standardized built-in sets of states for inclusion/exclusion.
  • For example:

# Built-in
new_england <- c("Connecticut", "Maine", "Massachusetts", "New Hampshire", "Rhode Island", "Vermont")
west_coast <- c("California", "Oregon", "Washington")
four_corners <- c("Arizona", "Colorado", "New Mexico", "Utah")
# --------

us_map(include = new_england)

• Including/excluding states should work for county maps too