Google Earth KML to a heathamp

csv2map.py

import heatmap # http://jjguy.com/heatmap/
import random
import csv

if __name__ == "__main__":
    pts = []
    for point in csv.reader(open('coords.csv')):
      pts.append((float(point[0]), float(point[1])))

    print "Processing %d points..." % len(pts)

    hm = heatmap.Heatmap()
    hm.heatmap(pts, "heatmap.png", 25, 128, (8192,8192))
    hm.saveKML("heatmap.kml")

mykml2csv.rb

require 'nokogiri' # gem install nokogiri

@doc = Nokogiri::XML(File.open("my.kml"))
@doc.css('coordinates').each do |coordinates|
  coordinates.text.split(' ').each do |coordinate|
    (lat,lon,elevation) = coordinate.split(',')
    puts "#{lat},#{lon}\n"
  end
end