Builds GeoJSON Feature objects from the profeco.precios dataset: http://datos.gob.mx/busca/dataset/quien-es-quien-en-los-precios

profeco.js

var es = require('event-stream')
var fs = require('fs')
var JSONStream = require('JSONStream')
var request = require('request')

function toGeoJSON(obj) {
  var lon = parseFloat(obj.longitud);
  var lat = parseFloat(obj.latitud);
  if (!lon || !lat) return null;

  return {
    type: 'Feature',
    properties: {
      precio: obj.precio,
      producto: obj.producto
    },
    geometry: {
      type: 'Point',
      coordinates: [ lon, lat ]
    }
  }
}

process.stdin
  .pipe(JSONStream.parse('results.*'))
  .pipe(es.mapSync((data) => {
    var feature = toGeoJSON(data);
    if (feature) console.log('%j', feature);
  }))