code: function readData(datapath, layer, callback) {
    var features = [];
  
    var options = {
      delimiter: ',',
      columns: true
    };
  
    fs.createReadStream(path.join(datapath, 'meta', `wof-${layer}-latest.csv`))
      .pipe(parse(options))
      .pipe(loadJSON.create(datapath))
      .pipe(isActiveRecord.create())
      .pipe(filterOutNamelessRecords.create())
      .pipe(filterOutUnimportantRecords.create())
      .pipe(extractFields.create())
      .pipe(simplifyGeometry.create())
      .pipe(sink.obj(function(feature) {
        features.push(feature);
      }))
      .on('finish', function() {
        callback(features);
      });
  
  }
docs: /*
  This function finds all the `latest` files in `meta/`, CSV parses them,
  pushes the ids onto an array and calls the callback