Convert a path or URL to a location object.
Examples
if (FALSE) { # \dontrun{
# A file
file <- system.file("examples", "zillow_or.geojson", package = "geojsonio")
as.location(file)
# A URL
url <- "https://raw.githubusercontent.com/glynnbird/usstatesgeojson/master/california.geojson"
as.location(url)
} # }