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-- enable CSV import mode
.mode csv

-- define the CSV separator
.separator ','

-- import & create tables, this will not insert the header line of a CSV file as a row
.import input/shapes.txt shapes
.import input/stops.txt stops
.import input/stop_times.txt stop_times

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const DEFAULT_CHUNK_SIZE = 1024;

class LineReader {
  constructor(options) {
    this.chunkSize = options.chunkSize || DEFAULT_CHUNK_SIZE;

    this.onLine = options.onLine;
    this.onEnd = options.onEnd;

    this.reader = new FileReader();

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{
  "start": 1496503113090,
  "end": 1496509113090,
  "line": {
    "type": "Feature",
    "properties": {},
    "geometry": {
      "type": "LineString",
      "coordinates": [
        [

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import json

with open('path/to/json/file') as data_file:
    # a python dictionary, similar to a JS object
    data = json.load(data_file)

    # iterate over features, 'features' is a python list
    for feature in data['features']:
        # access everything via brackets, no dot notation
        properties = feature['properties']

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/*
  1. install jsdom
  2. Usage:
    $ node scrape-delicious.js https://del.icio.us/<username>
  3. writes data to "bookmarks.json"
*/

const jsdom = require('jsdom');
const fs = require('fs');

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uniform float u_fade_t;
uniform float u_opacity;
uniform sampler2D u_image0;
uniform sampler2D u_image1;
varying vec2 v_pos0;
varying vec2 v_pos1;

uniform float u_brightness_low;
uniform float u_brightness_high;

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    populate(features, options) {
        const layout = this.layers[0].layout;
        const iconImage = layout['sdficon-image'];

        const hasIcon = iconImage;

        this.features = [];

        if (!hasIcon) {
            return;

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Build the docker image and start the container.

Start Xvfb in the container via

$ /etc/init.d/xvfb start

Run Chrome with working WebGL in kiosk mode

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import intersect from './intersect';

export default function createTileIntersect() {
  let tileCache = {};
  let lastBbox = null;

  return (boundingBox, tile) => {
    if (!boundingBox) {
      return true;
    }

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function convert(lngLatBounds) {
  return {
    topLeft: {
      lng: lngLatBounds.sw.lng,
      lat: lngLatBounds.ne.lat
    },
    bottomRight: {
      lng: lngLatBounds.ne.lng,
      lat: lngLatBounds.sw.lat
    }