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46 lines
1.8 KiB
46 lines
1.8 KiB
% Generated by roxygen2: do not edit by hand
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% Please edit documentation in R/counties_sf.r
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\name{counties_sf}
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\alias{counties_sf}
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\title{Retreive a U.S. county composite map, optionally with a projection, as a simplefeature}
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\usage{
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counties_sf(proj = c("longlat", "laea", "lcc", "eqdc", "aeqd"))
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}
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\arguments{
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\item{proj}{if anything but \code{longlat} is specified, the shapefile will
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be pre-projected before being returned}
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}
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\description{
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The \code{proj} parameter is intende to simplify usage for those using base
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plotting. If anything but \code{longlat} is specified the composite map
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will be pre-projected to those
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}
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\details{
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This is what's in the object looks like:
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\preformatted{
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Observations: 3,143
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Variables: 9
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$ fips <fctr> 01001, 01009, 01017, 01021, 01033, 01045, 01051, 01065, 01079, 0...
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$ state_fips <fctr> 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 05, 05, 06, ...
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$ county_fips <fctr> 001, 009, 017, 021, 033, 045, 051, 065, 079, 083, 099, 107, 121,...
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$ name <fctr> Autauga, Blount, Chambers, Chilton, Colbert, Dale, Elmore, Hale,...
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$ lsad <fctr> County, County, County, County, County, County, County, County, ...
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$ census_area <dbl> 594.436, 644.776, 596.531, 692.854, 592.619, 561.150, 618.485, 64...
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$ state <fctr> Alabama, Alabama, Alabama, Alabama, Alabama, Alabama, Alabama, A...
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$ iso_3166_2 <fctr> AL, AL, AL, AL, AL, AL, AL, AL, AL, AL, AL, AL, AL, AR, AR, CA, ...
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$ geometry <simple_feature> MULTIPOLYGON(((-86.496774 3..., MULTIPOLYGON(((-86.577...#' }
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A reference GeoJSON file isprovided in the following location (i.e. you can use
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it in any mapping program):
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\preformatted{
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system.file("extdata/composite_us_counties.geojson.gz", package="albersusa")
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}
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}
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\examples{
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library(sf)
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plot(counties_sf()) # these take a while to render
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plot(counties_sf("laea"))
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}
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