df_geojson: df to GeoJSON

In geojsonsf: GeoJSON to Simple Feature Converter

df to GeoJSON

Description

Converts data.frame objects to GeoJSON. Each row is considerd a POINT

Usage

df_geojson(
  df,
  lon,
  lat,
  z = NULL,
  m = NULL,
  atomise = FALSE,
  simplify = TRUE,
  digits = NULL,
  factors_as_string = TRUE
)

Arguments

df	data.frame
lon	column of df containing the longitude data
lat	column of df containing the latitude data
z	column of df containing the Z attribute of the GeoJSON
m	column of df containing the M attribute of the GeoJSON. If supplied, you must also supply z
atomise	logical indicating if the data.frame should be converted into a vector of GeoJSON objects
simplify	logical indicating if data.frame without property columns should simplify (TRUE) into a vector of GeoJSON, or (FALSE). If atomise is TRUE this argument is ignored.
digits	integer specifying the number of decimal places to round numerics. numeric values are coorced using as.integer, which may round-down the value you supply. Default is NULL - no rounding
factors_as_string	logical indicating if factors should be treated as strings. Defaults to TRUE.

Value

vector of GeoJSON

Examples

df <- data.frame(lon = c(1:5, NA), lat = c(1:5, NA), id = 1:6, val = letters[1:6])
df_geojson( df, lon = "lon", lat = "lat")
df_geojson( df, lon = "lon", lat = "lat", atomise = TRUE)

df <- data.frame(lon = c(1:5, NA), lat = c(1:5, NA) )
df_geojson( df, lon = "lon", lat = "lat")
df_geojson( df, lon = "lon", lat = "lat", simplify = FALSE)

df <- data.frame(lon = c(1:5), lat = c(1:5), elevation = c(1:5) )
df_geojson( df, lon = "lon", lat = "lat", z = "elevation")
df_geojson( df, lon = "lon", lat = "lat", z = "elevation", simplify = FALSE)

df <- data.frame(lon = c(1:5), lat = c(1:5), elevation = c(1:5), id = 1:5 )
df_geojson( df, lon = "lon", lat = "lat", z = "elevation")
df_geojson( df, lon = "lon", lat = "lat", z = "elevation", atomise = TRUE)


## to sf objects
geo <- df_geojson( df, lon = "lon", lat = "lat", z = "elevation")
sf <- geojson_sf( geo )

geojsonsf documentation built on May 31, 2022, 1:05 a.m.