dreams.js

var dowel = require('dowel'); // get it? joins? dowel? ugh
var mydata = require('./data.geojson');
var csvParser = require('csv-parser');

/**
 * okay so i have this dataset that's tabular
 * it's basically like
 * 
 * country | value
 * usa | 5
 * spain | 2
 * 
 * and i want to make a choropleth map of it
 */
 
 var joined = dowel.join(mydata, dowel.countries, {
   left: 'country',
   right: 'country'
 });
 
 /**
  * so now the variable 'joined' is a geojson of
  * countries with properties from your dataset
  * mydata joined to them.
  * 
  * let's visualize the data.
  */
  
var turf = require('turf');

var categorized = turf.categorize(joined, 'val', 'jenks', 5, 'class');

/**
 * Now the data is the geojson of countries with a 'class'
 * column of it broken up by values of the property 'val'.
 * Finally we want to visualize it.
 */
 
var colored = turf.helpers.color(categorized, 'class', 'RdGn', 'fill');

/**
 * And now it has a simplestyle-spec "fill" property which will
 * make it styled in Mapbox.js and Mapbox GL.
 */