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josecarlosgonz/geojson.R

Last active May 17, 2021 10:28
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How to create a geojson file in R from a dataframe
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geojson.R
#Write geojson
#====
#Load libraries
library(rgdal)
#dataMap is a dataframe with coordinates on cols 11 (LATITUDE) and 12 (LONGITUDE)
#Transfor coordinates to numeric
dataMap$LATITUDE <- as.numeric(dataMap$LATITUDE)
dataMap$LONGITUDE <- as.numeric(dataMap$LONGITUDE)
dataMap.SP <- SpatialPointsDataFrame(dataMap[,c(12,11)],dataMap[,-c(12,11)])
str(dataMap.SP) # Now is class SpatialPointsDataFrame
#Write as geojson
writeOGR(dataMap.SP, 'dataMap.geojson','dataMap', driver='GeoJSON')
@smakhtin
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Thanks for this great tip. I added check_exists to writeOGR in my fork, otherwise on my Ubuntu machine GDAL throw an "File not exist" error. https://gist.github.com/smakhtin/f06423ae23cb9d30ce75

@alfcrisci
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You are welcome!

@makis23
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makis23 commented Oct 10, 2017

What is the name of the geojson object you create? I try xx<-writeOGR(foo1_eqi.SP, 'foo1_eqi.geojson','foo1_eqi', driver='GeoJSON',check_exists = FALSE)
and take:

str(xx)
NULL

@fagnersutel
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This feature generate a unique polygon? There is a iterative mode to create 1, 2, 3 polygons?

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