Latitude & Longitude average string lengths

parse_cities.rake

require 'fastercsv'

desc "Parse city data"
task "cities" do
  headers = [:country_code, :ascii_name, :name, :state, :population, :lat, :long]
  long_num, lat_num = [], []
  FasterCSV.foreach(File.join(File.dirname(__FILE__), "../../", "doc/us_cities.txt"), :headers => headers) do |row|
    begin
      lat_num << row[:lat].length
      long_num << row[:long].length
    rescue Exception => e         
      puts e.message              
    end
  end
  puts "Lat: #{lat_num.sort.uniq.inspect}"
  puts "Long: #{long_num.sort.uniq.inspect}"
end      

Output: 
$ rake cities
Lat: [9, 10, 11]
Long: [11, 12]

So, US Cities Latitude numbers are in the 9-11 character length range and Longitude can be 11-12 characters long