x: Object of class geo_list, geo_json, string, or json
stringsAsFactors: Convert strings to Factors? Default FALSE.
...: Further args passed on to sf::st_read()
Returns
An sf class object, see Details.
Details
The type of sf object returned will depend on the input GeoJSON. Sometimes you will get back a POINTS class, and sometimes a POLYGON class, etc., depending on what the structure of the GeoJSON.
The reading and writing of the CRS to/from geojson is inconsistent. You can directly set the CRS by passing a valid PROJ4 string or epsg code to the crs argument in sf::st_read()
Examples
## Not run:library(sf)# geo_list ------------------## From a numeric vector of length 2 to a pointvec <- c(-99.74,32.45)geojson_list(vec)%>% geojson_sf()## Lists## From a listmylist <- list( list(latitude =30, longitude =120, marker ="red"), list(latitude =30, longitude =130, marker ="blue"))geojson_list(mylist)%>% geojson_sf()geojson_list(mylist)%>% geojson_sf()%>% plot()## From a list of numeric vectors to a polygonvecs <- list(c(100.0,0.0), c(101.0,0.0), c(101.0,1.0), c(100.0,1.0), c(100.0,0.0))geojson_list(vecs, geometry ="polygon")%>% geojson_sf()geojson_list(vecs, geometry ="polygon")%>% geojson_sf()%>% plot()# geo_json ------------------## from pointgeojson_json(c(-99.74,32.45))%>% geojson_sf()geojson_json(c(-99.74,32.45))%>% geojson_sf()%>% plot()# from featurecollectino of pointsgeojson_json(us_cities[1:2,], lat ="lat", lon ="long")%>% geojson_sf()geojson_json(us_cities[1:2,], lat ="lat", lon ="long")%>% geojson_sf()%>% plot()# Set the CRS via the crs argumentgeojson_json(us_cities[1:2,], lat ="lat", lon ="long")%>% geojson_sf(crs ="+init=epsg:4326")# json ----------------------x <- geojson_json(us_cities[1:2,], lat ="lat", lon ="long")geojson_sf(x)# character string ----------------------x <- unclass(geojson_json(c(-99.74,32.45)))geojson_sf(x)## End(Not run)