kml2ov2.rb

#!/opt/local/bin/ruby

# Licensed under GPLv2
# by Bess Sadler
# inspired by a perl script written by Tor Arntsen

# 1. Read in KML file
# 2. Extract lat / long and name
# 3. Write that information to an ov2 file

require 'rubygems'
require 'nokogiri'

doc = Nokogiri::XML(open("delocator_kml.xml"))

open('output.ov2', 'w') do |f|
  
  doc.xpath('//xmlns:Placemark', 'xmlns' => "http://earth.google.com/kml/2.0").each do |place|
    coordinates = place.xpath('./xmlns:Point/xmlns:coordinates/text()', 'xmlns' => "http://earth.google.com/kml/2.0").to_s.split(',')
    north = Float(coordinates[0])
    east = Float(coordinates[1])
    name = place.xpath('./xmlns:name/text()', 'xmlns' => "http://earth.google.com/kml/2.0").to_s
  
    len = 1+name.length; # Include the NULL (added by 'pack')
    siz = 13+len; # Size of three first fields plus the string above

    f << [2, siz, (north*1E5).to_i, (east*1E5).to_i, name].pack("C I i i Z#{len}")
  end
end