maptools (version 1.1-7)

state.vbm: US State Visibility Based Map

Description

A SpatialPolygonsDataFrame object (for use with the maptools package) to plot a Visibility Based Map.

Usage

data(state.vbm)

Author

Greg Snow (of this compilation)

Details

A SpatialPolygonsDataFrame object (for use with the maptools package) to plot a map of the US states where the sizes of the states have been adjusted to be more equal.

This map can be useful for plotting state data using colors patterns without the larger states dominating and the smallest states being lost.

The original map is copyrighted by Mark Monmonier. Official publications based on this map should acknowledge him. Comercial publications of maps based on this probably need permission from him to use.

References

http://www.markmonmonier.com/index.htm, http://euclid.psych.yorku.ca/SCS/Gallery/bright-ideas.html

Examples

  data(state.vbm)
  plot(state.vbm)

  tmp <- state.x77[,'HS Grad']
  tmp2 <- cut(tmp, seq(min(tmp),max(tmp), length.out=11),
    include.lowest=TRUE)
  plot(state.vbm,col=cm.colors(10)[tmp2])