Read topojson from a local file or a URL

Read topojson from a local file or a URL

Usage

topojson_read(x, ...)

Arguments

x

Path to a local file or a URL.

...

Further args passed on to sf::st_read(). Can use any args from sf::st_read() except quiet, which we have set as quiet = TRUE internally already

Value

an object of class sf/data.frame

Details

Returns a sf class, but you can easily and quickly get this to geojson, see examples.

Note that this does not give you Topojson, but gives you a sf class - which you can use then to turn it into geojson as a list or json

See also

geojson_read(), topojson_write()

Examples

if (FALSE) { # \dontrun{
# From a file
file <- system.file("examples", "us_states.topojson", package = "geojsonio")
topojson_read(file)

# From a URL
url <- "https://raw.githubusercontent.com/shawnbot/d3-cartogram/master/data/us-states.topojson"
topojson_read(url)

# Use as.location first if you want
topojson_read(as.location(file))

# quickly convert to geojson as a list
file <- system.file("examples", "us_states.topojson", package = "geojsonio")
tmp <- topojson_read(file)
geojson_list(tmp)
geojson_json(tmp)

# pass on args
topojson_read(file, quiet = TRUE)
topojson_read(file, stringsAsFactors = FALSE)
} # }