convert spatial data.frame to a vector of geojson text strings

Usage

shape2geojson(
  shp,
  file = file.path(tempdir(), "shp.geojson"),
  txt = TRUE,
  combine_in_one_string = FALSE,
  combine_in_one_file = TRUE
)

Arguments

shp: spatial data.frame to be written via sf::st_write()
file: optional file path and name, useful if txt=F
txt: optional logical, set to FALSE to just get the path to a temp .geojson file
combine_in_one_string: set to TRUE to get back only 1 geojson txt string. If FALSE, output is a vector of strings.
combine_in_one_file: set to TRUE to get back only 1 file (1 row per polygon, not union/dissolved). If FALSE, output is a vector of filenames (saves each row of input shp as a separate file).

Value

if txt=T, returns geojson text string(s) for the input spatial data.frame if txt=F, returns file path/name(s) of .geojson file(s).

Details

helper for url_ejamapi() Note it removes all spaces in the string.

Note that trying to use txt=T and combine_in_one_string = T for large polygons or many polygons would create a very long string that might exceed URL length limits for GET requests, if that is what you're using the text for.

Examples

shp =  testinput_shapes_2[2, c("geometry", "FIPS")]
x = shape2geojson(shp)
nchar(x)