USAboundaries 0.3.0

  • Moved most data to USAboundariesData. This improves loading time and permits more frequent updates to the user-facing package.
  • Added state plane projections table and functions (@jfbratt). Now users can get an appropriate projection for a state.
  • Converted all boundary objects to sf objects.
  • Updated all contemporary census boundaries from the 2014 to the 2016 versions.
  • Added zipcode tabulation area centroids.
  • Added historical city populations compiled by Erik Steiner at CESTA/Stanford University.

USAboundaries 0.2.0

  • Added contemporary boundaries for states, counties, and congressional districts.
  • Import many fewer packages. The us_boundaries() function no longer has an option to return a fortified data frame. It is assumed that users will convert the SpatialPolygonsDataFrame objects to whatever format they need.
  • High resolution data is now available in the USAboundariesData package.

USAboundaries 0.1.1

  • Fix to README.md as requested by CRAN.

USAboundaries 0.1

  • Initial release.
  • us_boundaries() returns an sp object or a data frame which can be plotted.