reduce KML size

require 'nokogiri'
require 'pry'
now = Time.now

TARGET = 8000

# binding.pry
@doc = Nokogiri::XML(File.open(ARGV[0]))

all_coordinates_str = @doc.search("coordinates").children.to_s

all_coordinates = all_coordinates_str.split("\n")

all_coordinates.each_with_index do |value, index|
  all_coordinates.delete(value) if index%2==0
end if all_coordinates.length > TARGET
puts all_coordinates.length

@doc.search("coordinates").first.children = all_coordinates.join("\n")

puts "write back to #{ARGV[0] + "_new.kml"}"
puts Time.now-now
File.write(ARGV[0] + "_new.xml", @doc.to_xml)

This script try to reduce the KML point size to enable import to latlonglab