gpx2json.rb

#!/usr/bin/env ruby -w

# My first Ruby program

require "json"

if ARGV.empty?
    puts "Usage gpx2json.rb filename"
    exit
end

text = File.read(ARGV[0])
points = Array.new
text.each_line do |line|
    result = /lat="([0-9.]+)".+lon="([0-9.]+)"/.match(line)
    if result != nil
        lat = result[1].to_f
        lng = result[2].to_f
        points.push([lat, lng])
    end
end
puts JSON.generate(points)