create_map_table | R Documentation |
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 = 1e-04)
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.
Quinn Payton Payton.Quinn@epa.gov
data("USstates")
head(USstates@data)
statePolys <- create_map_table(USstates, IDcolumn="ST")
head(statePolys)
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