text: var us = require('./topojson/provinces/provinces_US.json');
  var topojson = require('topojson');
  var _ = require('underscore');
  
  var provinces = topojson.feature(us, us.objects.provinces);
  
  _(provinces.features).each(function(c) {
      console.log(c.properties.postal, c.properties.adm1_code);
  });
  