Skip to contents

df to GeoJSON

Source: R/sf_geojson.R
df_geojson.Rd

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")
#> {"type":"FeatureCollection","features":[{"type":"Feature","properties":{"id":1,"val":"a"},"geometry":{"type":"Point","coordinates":[1.0,1.0]}},{"type":"Feature","properties":{"id":2,"val":"b"},"geometry":{"type":"Point","coordinates":[2.0,2.0]}},{"type":"Feature","properties":{"id":3,"val":"c"},"geometry":{"type":"Point","coordinates":[3.0,3.0]}},{"type":"Feature","properties":{"id":4,"val":"d"},"geometry":{"type":"Point","coordinates":[4.0,4.0]}},{"type":"Feature","properties":{"id":5,"val":"e"},"geometry":{"type":"Point","coordinates":[5.0,5.0]}},{"type":"Feature","properties":{"id":6,"val":"f"},"geometry":null}]} 
df_geojson( df, lon = "lon", lat = "lat", atomise = TRUE)
#> {"type":"Feature","properties":{"id":1,"val":"a"},"geometry":{"type":"Point","coordinates":[1.0,1.0]}} 
#> {"type":"Feature","properties":{"id":2,"val":"b"},"geometry":{"type":"Point","coordinates":[2.0,2.0]}} 
#> {"type":"Feature","properties":{"id":3,"val":"c"},"geometry":{"type":"Point","coordinates":[3.0,3.0]}} 
#> {"type":"Feature","properties":{"id":4,"val":"d"},"geometry":{"type":"Point","coordinates":[4.0,4.0]}} 
#> {"type":"Feature","properties":{"id":5,"val":"e"},"geometry":{"type":"Point","coordinates":[5.0,5.0]}} 
#> {"type":"Feature","properties":{"id":6,"val":"f"},"geometry":null} 

df <- data.frame(lon = c(1:5, NA), lat = c(1:5, NA) )
df_geojson( df, lon = "lon", lat = "lat")
#> {"type":"Point","coordinates":[1.0,1.0]} 
#> {"type":"Point","coordinates":[2.0,2.0]} 
#> {"type":"Point","coordinates":[3.0,3.0]} 
#> {"type":"Point","coordinates":[4.0,4.0]} 
#> {"type":"Point","coordinates":[5.0,5.0]} 
#> null 
df_geojson( df, lon = "lon", lat = "lat", simplify = FALSE)
#> {"type":"FeatureCollection","features":[{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[1.0,1.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[2.0,2.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[3.0,3.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[4.0,4.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[5.0,5.0]}},{"type":"Feature","properties":{},"geometry":null}]} 

df <- data.frame(lon = c(1:5), lat = c(1:5), elevation = c(1:5) )
df_geojson( df, lon = "lon", lat = "lat", z = "elevation")
#> {"type":"Point","coordinates":[1.0,1.0,1.0]} 
#> {"type":"Point","coordinates":[2.0,2.0,2.0]} 
#> {"type":"Point","coordinates":[3.0,3.0,3.0]} 
#> {"type":"Point","coordinates":[4.0,4.0,4.0]} 
#> {"type":"Point","coordinates":[5.0,5.0,5.0]} 
df_geojson( df, lon = "lon", lat = "lat", z = "elevation", simplify = FALSE)
#> {"type":"FeatureCollection","features":[{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[1.0,1.0,1.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[2.0,2.0,2.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[3.0,3.0,3.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[4.0,4.0,4.0]}},{"type":"Feature","properties":{},"geometry":{"type":"Point","coordinates":[5.0,5.0,5.0]}}]} 

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")
#> {"type":"FeatureCollection","features":[{"type":"Feature","properties":{"id":1},"geometry":{"type":"Point","coordinates":[1.0,1.0,1.0]}},{"type":"Feature","properties":{"id":2},"geometry":{"type":"Point","coordinates":[2.0,2.0,2.0]}},{"type":"Feature","properties":{"id":3},"geometry":{"type":"Point","coordinates":[3.0,3.0,3.0]}},{"type":"Feature","properties":{"id":4},"geometry":{"type":"Point","coordinates":[4.0,4.0,4.0]}},{"type":"Feature","properties":{"id":5},"geometry":{"type":"Point","coordinates":[5.0,5.0,5.0]}}]} 
df_geojson( df, lon = "lon", lat = "lat", z = "elevation", atomise = TRUE)
#> {"type":"Feature","properties":{"id":1},"geometry":{"type":"Point","coordinates":[1.0,1.0,1.0]}} 
#> {"type":"Feature","properties":{"id":2},"geometry":{"type":"Point","coordinates":[2.0,2.0,2.0]}} 
#> {"type":"Feature","properties":{"id":3},"geometry":{"type":"Point","coordinates":[3.0,3.0,3.0]}} 
#> {"type":"Feature","properties":{"id":4},"geometry":{"type":"Point","coordinates":[4.0,4.0,4.0]}} 
#> {"type":"Feature","properties":{"id":5},"geometry":{"type":"Point","coordinates":[5.0,5.0,5.0]}} 


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