Convert multiple feature/layers in a geoJSON file to individual files

explode-geojson.rb

# Creates multiple files from one geojson file
require 'json'

file = File.read('data.geojson')
data_hash = JSON.parse(file)
data_hash['features'].each do |feature|
    file_name = feature['properties']['OBJECTID']
    File.open("#{file_name}.geojson", 'w') do |f|
        f.write(feature.to_json)
    end
end