Little ruby script to generate a test KML file, with 40 random markers

random_kml.rb

puts '<?xml version="1.0" encoding="UTF-8"?>'
puts '<kml xmlns="http://www.opengis.net/kml/2.2">'
puts '<Document>'
puts "  <name>Lots of placemarks #{random_str}</name>"
puts '  <description>A test KML file with lots of placemarks</description>'

(0..40).each do
  puts '<Placemark>'
  puts "  <name>placemark name #{random_str}</name>"
  puts "  <description>#{random_str}#{random_str}#{random_str}</description>"
  puts "  <Point><coordinates>#{random_coords},0</coordinates></Point>"
  puts '</Placemark>'
end
puts '</Document>'
puts '</kml>'

def random_str
  (0...10).map { ('a'..'z').to_a[rand(26)] }.join
end

def random_coords
  lat = 51.50774 + (rand - 0.5) * 3
  lon = -0.12788 + (rand - 0.5) * 3
  "#{lon},#{lat}"
end