compare-geojson/scripts/primary-map-features.js

Compare a features new and old versions in GeoJSON

'use strict';

var argv = require('minimist')(process.argv.slice(2));
var queue = require('d3-queue').queue;
var request = require('request');
var csv = require('csv');
var fs = require('fs');

if (!argv.output) {
  console.log('');
  console.log('USAGE: node primary-map-features.js OPTIONS');
  console.log('');
  console.log('  OPTIONS');
  console.log('    --output counts.csv');
  console.log('');
  return;
}

// From: https://wiki.openstreetmap.org/wiki/Map_Features
var features = [
  'aerialway', 'aeroway', 'amenity', 'barrier', 'boundary', 'building', 'craft', 'emergency',
  'geological', 'highway', 'historic', 'landuse', 'leisure', 'man_made', 'military', 'natural',
  'office', 'places', 'power', 'public_transport', 'railway', 'route', 'shop', 'sport',
  'tourism', 'waterway'
];

function readURL(url, callback) {
  console.log(url);
  request(url, function (error, response, body) {
    if (error) callback(error);

    var counts = [];
    if (!error && response.statusCode === 200) {
      var combinations = JSON.parse(body).data;

      for (var i = 0; i < features.length; i++) {
        // Initialize counts to zero.
        counts[i] = 0;

        for (var j = 0; j < combinations.length; j++) {
          if (combinations[j]['other_key'] === features[i]) {
            counts[i] = 100.0 * combinations[j]['to_fraction'];
          }

        }
      }

      callback(null, counts);
    }
  });
}

var q = queue(1);

for (var i = 0; i < features.length; i++) {
  var url = 'https://taginfo.openstreetmap.org/api/4/key/combinations?key=';
  var featureURL = encodeURI(url + features[i]);

  q.defer(readURL, featureURL);
}

q.awaitAll(function (error, results) {
  if (error) console.log(error);

  results = [features].concat(results);
  csv.stringify(results, function (error, resultsAsString) {
    fs.writeFileSync(argv.output, resultsAsString);
  });
});


/*

Vertical headers of 26 primary features for csv file.

aerialway
aeroway
amenity
barrier
boundary
building
craft
emergency
geological
highway
historic
landuse
leisure
man_made
military
natural
office
places
power
public_transport
railway
route
shop
sport
tourism
waterway

*/