R Graphical Manual

Last data update: 2014.03.03

R: Prepares A Polygon Table

create_map_table

R Documentation

Prepares A Polygon Table

Takes the user supplied polygon table and prepares it to be plotted correctly with the lmplot function.

create_map_table(tmp.map, IDcolumn=NA, poly.thresh=.0001)

`tmp.map`	a shapefile to be parsed into a flat table for use with ggplot2.
`IDcolumn`	specify which column in the data file to use as a unique identifier.
`poly.thresh`	specify the minimum polygon area which to keep. All polygons with less area will be dropped.

A flat table of all the polygons in the shapefile with an entry for each vertice.

## Not run: 
data("USstates")
head(USstates@data)
statePolys <- create_map_table(USstates, IDcolumn="ST")
head(statePolys)

## End(Not run)