Hacky ruby script to generate RFC 1876 DNS LOC records from RFC 7946 Geojson file

loc_generator.rb

require 'json'

def degrees(point)
  point.abs.to_i
end

def minutes(point)
  (point.abs * 60).to_i % 60
end

def seconds(point)
  (point.abs * 3600) % 60
end

def lath(point)
  point > 0 ? 'N' : 'S'
end

def lonh(point)
  point > 0 ? 'E' : 'W'
end

def loc(lat, lon, altitude=0)
  fail(ArgumentError) if lat.abs > 90
  fail(ArgumentError) if lon.abs > 180
  sprintf("%d %d %g %s %d %d %g %s %gm",
          degrees(lat),
          minutes(lat),
          seconds(lat).round(2),
          lath(lat),
          degrees(lon),
          minutes(lon),
          seconds(lon).round(2),
          lonh(lon),
          altitude.round(2))
end

places = JSON.parse(File.read('places.json'))['features']

places.each do |place|
  lon, lat = place['geometry']['coordinates']
  #puts [lat, lon].join(',')
  puts loc(lat, lon)
end