% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/albersusa.R
\name{usa_composite}
\alias{usa_composite}
\title{Retrieve a U.S. state composite map, optionally with a projection}
\usage{
usa_composite(proj = c("longlat", "laea", "lcc", "eqdc", "aeqd"))
}
\arguments{
\item{proj}{if anything but \code{longlat} is specified, the shapefile will
be pre-projected before being returned}
}
\description{
The \code{proj} parameter is intende to simplify usage for those using base
plotting. If anything but \code{longlat} is specified the composite map
will be pre-projected to those
}
\details{
This is what's in the SPDF \code{@data} slot:

\preformatted{
Observations: 51
Variables: 13
$ geo_id              (chr) "0400000US04", "0400000US05", "0400000US06", "0400...
$ fips_state          (chr) "04", "05", "06", "08", "09", "11", "13", "17", "1...
$ name                (chr) "Arizona", "Arkansas", "California", "Colorado", "...
$ iso_3166_2          (chr) "AZ", "AR", "CA", "CO", "CT", "DC", "GA", "IL", "I...
$ census              (int) 6392017, 2915918, 37253956, 5029196, 3574097, 6017...
$ pop_estimataes_base (int) 6392310, 2915958, 37254503, 5029324, 3574096, 6017...
$ pop_2010            (int) 6411999, 2922297, 37336011, 5048575, 3579345, 6052...
$ pop_2011            (int) 6472867, 2938430, 37701901, 5119661, 3590537, 6204...
$ pop_2012            (int) 6556236, 2949300, 38062780, 5191709, 3594362, 6350...
$ pop_2013            (int) 6634997, 2958765, 38431393, 5272086, 3599341, 6491...
$ pop_2014            (int) 6731484, 2966369, 38802500, 5355866, 3596677, 6588...
}

A reference GeoJSON file is provided in the following location (i.e. you can use
it in any mapping program):

\preformatted{
system.file("extdata/composite_us_states.geojson.gz", package="albersusa")
}
}
\examples{
library(sp)

plot(usa_composite())
plot(usa_composite("laea"))
}