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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>DataVizFest</title>
<link rel="stylesheet" href="presentation/css/reveal.css">
<link rel="stylesheet" href="presentation/css/theme/datavizfest.css">
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="presentation/lib/css/zenburn.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'presentation/css/print/pdf.css' : 'presentation/css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
</head>
<body>
<div class="reveal">
<div class="slides">
<section data-background="presentation/img/Screenshot_background2.png">
<section>
<h1>DataViz Festival 2018</h1>
<h2 style="margin: 0 0 40px 0;"></h2>
<h3 style="margin: 0 0 0 0;">Niene Boeijen</h3>
</section>
<section>
<p>This presentation and materials:</p>
<h2 style="text-transform: initial;"><a href="github.com/NieneB/geo_visualisatie_workshop">github.com/NieneB/geo_visualisatie_workshop</a></h2>
</section>
</section >
<!-- All about me me me ! -->
<section data-background="presentation/img/screenshot_background.png">
<section>
<h1>About me</h1>
</section>
<section>
<div style="float:right; width:50%;">
<a href="http://webmapper.net"><img src="presentation/img/webmapper_logo_tekst.png" height="100px"> </a>
<br/>
<a href="http://maptime.io"><img src="presentation/img/maptimeAMS.png" height="130px"></a>
<br/>
<a href="https://waag.org/en/users/niene-boeijen"><img src="presentation/img/WS_logo.jpg" height="100px"></a>
<br/>
<br/>
<img src="presentation/img/wur.jpg" height="50px">
</div>
<div style="float:left; width: 50%;">
<p>Web Cartographer & Geo ICT developer</p>
<br/>
<p> Event Organizer: Maptime <a href="https://www.meetup.com/Maptime-AMS">Amsterdam</a> & <a href="https://www.meetup.com/Maptime030-Utrecht/">Utrecht</a></p>
<br/>
<p>Internship Geo Web Visualization<a href="http://nieneb.github.io/verstedelijking/">[1]</a>
<br/>
<a href="http://nieneb.github.io/TopoNamen/">[2] </a> <a href="http://nieneb.github.io/InternshipReport/">[3]</a></p>
<br/>
<p>Msc Geo Information Science & Remote Sensing <a href="http://nieneb.github.io/ThesisPresentation/#/">[1]</a></p>
</div>
</section>
<section data-background="presentation/img/versie_2_web_1260.png" data-background-size=80%>
<!-- <blockquote class="fragment fade-up">
<p>Our expertise is open {source; data; standards} </p>
<p>Our power lies in combining cartography, webtechnology with geo.</p>
<p>Utrecht, The Netherlands</p>
</blockquote> -->
</section>
<section >
<div style="float:top; width:100%">
<blockquote>
<i><p>We make interactive maps and visualizations.</p></i>
</blockquote>
</div>
<div style="float:bottom; width:100%;">
<a href="http://apps.webmapper.nl/gebouwen/"><img src="presentation/img/webmapper.gif" width="49%" /></a>
<a href="http://geodata.nationaalgeoregister.nl/beta/topotiles-viewer/"><img src="presentation/img/pdok_vt_viewer.gif" width="49%" /></a>
</div>
</section>
</section>
<!-- WHY MAPS? -->
<section data-background="presentation/img/Screenshot_background3.png" >
<section >
<h1><u>Geo</u> Data Visualizations</h1>
<h2><i>for the web</i></h2>
<aside class="notes">
Ik werk elke dag met kaarten.
Doel = Jullie vandaag overtuigen dat je een kaart moet maken.
</aside>
</section>
<section>
<blockquote>
<q>everything is related to everything else, but near things are more related than distant things</q>
<p>Tobler's first law of geography</p>
</blockquote>
</section>
<!-- <section>
<blockquote>
<p>Infomation may be infinite. The ways of organizing information are finite.</p>
<ul>
<li><b>L</b>ocation</li>
<li><b>A</b>lpabetical</li>
<li><b>T</b>ime</li>
<li><b>C</b>ategory</li>
<li><b>H</b>ierarchy</li>
</ul>
<br/>
<br/>
<q>Richard Saul Wurman, 1996</q>
</blockquote>
<aside class="notes">
Locatie is 1 van de manieren om informatie te organiseren.
</aside>
</section> -->
<section>
<h1>Power of Maps</h1>
<p>Our brains organise by location </p>
<i>We have no choice but to think and see spatially</i>
<a href="http://learn.arcgis.com/en/arcgis-book/chapter3/">[1]</a>
<aside class="notes">
Overleving is ruimtelijk denken. Onze hersenen werken ruimtelijk.
Een mooie kaart stimuleerd daarom beide zijde van onze hersenen. Rechts voor intuity and aesthetcis, links rationeel anlytisch en ruimtelijk.
</aside>
</section>
<section >
<img src="presentation/img/ChartGuide-Poster-30-preview.jpg"/>
<aside class="notes">
Daarom focussen wij nu op de ruimtelijke aspecten van de data. Hier wordt de kaart een beetje onder gewardeerd. We hopen jullie te laten zien wat de kracht van de kaart is en hoe je een kaart kan maken.
maps allow us to communicate about location using a common framework.
</aside>
</section>
<section>
<h1>Goal of these 50 min..</h1>
</section>
</section>
<!-- GEO data explained -->
<section data-background="presentation/img/Screenshot4.png">
<section>
<h1>What is <u>Geo</u> Data ?</h1>
<aside class="notes"> Hiervoor gaan we gebinnen bij het begin. Map is collection of geo data. Wat is geo data? Wat is er anders aan? </aside>
</section>
<section>
<h1><u>Geo</u> Data = Data + Location</h1>
<p>Vector vs Raster</p>
<img src="presentation/img/point_line_polygon.jpg" width="35%">
<img src="presentation/img/attributes.jpg" width="35%">
</section>
<section>
<h1>Maps = Collection of <u>Geo</u> data</h1>
<p>Maps organise complex data about the environment. </p>
<p>Reveal patterns and relationships.</p>
<p>Maps allow us to communicate about location using a <u>common framework</u></p>
</section>
<section>
<h1>Coordinate system</h1>
<p>Communicate locations & distances on the Earth's surface</p>
<img src="presentation/img/round_flat.jpg" width="50%">
</section>
<section>
<h1>Shape of the earth?</h1>
<img src="presentation/img/geoid.jpg" width="50%" />
<p>The real shape of the earth is too complex to be useful as a reference for measurement..</p>
</section>
<section>
<h1>Geographic coordinate system</h1>
<img src="presentation/img/geograpic_coord.jpg" width="50%"/>
<p>3D model</p>
<p>Longitude Latitude</p>
</section>
<section>
<h1>Projected coordinate system</h1>
<img src="presentation/img/projected_coord.jpg" width="50%" />
<p>Mathematical projection / translation</p>
<p>2D</p>
</section>
<section>
<h4>Geographic Coordinate System:</h4>
<h1>WGS84 EPSG:4326 </h1>
<p>Lon Lat in decimal degrees</p>
<p>GPS</p>
<p>Standard way to store most geodata for the Web:</p>
<p><a href="http://geojson.org/">GeoJSON</a></p>
<pre><code>
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [5.2394137,52.0819662]
},
"properties": {
"name": "Hotel Theater Figi"
}
}</code></pre>
<aside class="notes">standardize the way we describe locations on a map
GeoJSON is a geospatial data interchange format based on JavaScript
Object Notation (JSON).
GeoJSON uses a geographic coordinate reference system, World Geodetic
System 1984, and units of decimal degrees.
geometry types: Point, LineString, Polygon, MultiPoint, MultiLineString, and MultiPolygon. </aside>
</section>
<section>
<h4>Projected Coordinate System:</h4>
<h1>Spherical/Web Mercator EPSG:3857</h1>
<p>Square, scale not relevant, shapes important</p>
<img src="presentation/img/image23.png" width="25%"/>
<p><i>We store data in EPSG:4326, but display it in EPSG:3857!</i></p>
<aside class="notes">first introduced by Google and is used in almost 100% of web maps</aside>
</section>
<section>
<h1>Why is Mercator wrong?</h1>
<p><a href="https://bramus.github.io/mercator-puzzle-redux/">True Size puzzle</a></p>
<p><a href="https://www.youtube.com/watch?v=eLqC3FNNOaI">West Wing</a></p>
</section>
<section>
<h4>Projected Coordinate System:</h4>
<h1>RD New EPSG:28992</h1>
<p>Netherlands!</p>
<img src="presentation/img/rd_new.gif" width="49%" />
<img src="presentation/img/bessel.jpg" width="40%"/>
</section>
<section>
<h4>Geographic Coordinate System:</h4>
<p>WGS84 EPSG:4326</p>
<h4>Projected Coordinate System:</h4>
<p>Web Mercator EPSG:3857</p>
<h4>Projected Coordinate System:</h4>
<p>RD New EPSG:28992</p>
</section>
<section>
<img src="https://media.giphy.com/media/6KKab1ydLq1uU/giphy.gif">
<br/>
<p><a href="http://lyzidiamond.com/posts/4326-vs-3857">[1]</a></p>
<p><a href="https://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/">[2]</a></p>
</section>
</section>
<!-- Gettin my map to the web -->
<section data-background="presentation/img/Screenshot6.png">
<section>
<h1>Getting my map to the web</h1>
</section>
<section>
<img src="presentation/img/web_map_universe.png"/>
<!-- <p>Online hosting</p>
<p>Download</p>
<p>Qgis , ArcMap</p>
<p>Postgis, SQL</p -->
</section>
<!-- <section>
<img src="presentation/img/web_map_building_blocks.png">
</section> -->
<section>
<h1>Maker-driven vs User-driven view</h1>
<h2>Interactive</h2>
<a href="https://books.google.nl/books?hl=en&lr=&id=aO5OYTP8LyIC&oi=fnd&pg=PP1&dq=kraak+web+cartography&ots=3Qi3znZ6fq&sig=x_9oCTlAljMcP8rgAGMPNa7MKU0#v=onepage&q=kraak%20web%20cartography&f=false">[1]</a>
<aside class= "notes"><p>GIS web map</p>
<p> Animated, real time</p>
<p>Collaborative web maps</p>
<p>Online Atlasses</p>
<p>Static web maps</p></aside>
</section>
<!-- <section>
<h1>JavaScript Libraries for Mapping</h1>
<p><a href="https://openlayers.org/">OpenLayers</a>
<p class="fragment grow"><a href="http://leafletjs.com/">Leaflet.js</a></p>
<p class="fragment grow"><a href="https://d3js.org/">D3.js</a></p>
<p><a href="https://developers.google.com/maps/documentation/javascript/">Google Maps</a></p>
<p class="fragment grow"><a href="https://www.mapbox.com/mapbox.js/api/v3.1.1/">Mapbox</a></p>
<p><a href="https://developer.here.com/develop/javascript-api">HERE Maps</a></p>
</section> -->
<section>
<h1>Maker-driven: D3.js</h1>
<p>Interactive</p>
<p>Graphic</p>
<p>More about coordinate systems and projections</p>
<iframe src="d3-js/04_visualisation.html" style="width:100%; height:300px;"> </iframe>
</section>
<section>
<h1>User-driven: Leaflet.js</h1>
<p>Tiled Web Map</p>
<p>Static Background. Raster based</p>
<p>Interactive layers</p>
<iframe src="leaflet-js/04_geojson.html" style="width:100%; height:400px;"> </iframe>
</section>
<section>
<h1>User-driven: MapboxGL.js</h1>
<p>Customized Background map </p>
<p>Interactive Data</p>
<p>WebGL rendering!</p>
<iframe src="mapbox-gl-js/05_custom_map_extrusion.html#10/50.87/5.9/-62/60" style="width:100%; height:400px;"> </iframe>
</section>
</section>
<!-- D3.js -->
<section data-background="presentation/img/Screenshot_background2.png">
<section>
<h1>D3.js</h1>
<p>Maker-driven Web Maps</p>
<iframe src="d3-js/04_visualisation.html" style="width:100%; height:300px;"> </iframe>
<p>Scale-dependent styling is a hassle</p>
</section>
<section>
<h4>From real-world to screen coordinates?</h4>
<p>The solution?</p>
<h1 class="fragment grow"><a href="https://github.com/d3/d3-geo">d3.geo</a></h1>
</section>
<section>
<h4>Geo data = big data?</h4>
<p>The solution?</p>
<h1 class="fragment grow"><a href="https://github.com/topojson">TopoJSON</a></h1>
<img src="presentation/img/topology.jpg" width="50%">
</section>
<section>
<h4>More geo data = bigger data?</h4>
<p>The solution</p>
<h1 class="fragment grow"><a href="https://github.com/d3/d3-queue">d3.queue</a></h1>
</section>
<section>
<h1>Let's code!</h1>
<p><a href="https://bl.ocks.org/emacgillavry/e3ccf5439ee389266b3553081e2a8e2a">Basic GeoJSON map</a></p>
<p><a href="https://bl.ocks.org/emacgillavry/a9e89b173f6a6d3286f8d0a6f2b911ee">From GeoJSON to TopoJSON</a></p>
<p><a href="https://bl.ocks.org/emacgillavry/bb3d803f44a2a8956bc3b16d52355b6e">Add multiple sources</a></p>
<p><a href="https://bl.ocks.org/emacgillavry/202e2c31063adae17b18c201cdec98b5">Visualise the data</a></p>
<p><a href="https://bl.ocks.org/emacgillavry/222ed006a912fbdafe8b20753e14b15a">Add a base map</a></p>
</section>
</section>
<!-- Leaflet.js -->
<section data-background="presentation/img/Screenshot6.png">
<section>
<h1>Leaflet.js</h1>
<p>Interactive Web Maps</p>
<iframe src="leaflet-js/04_geojson.html" style="width:100%; height:400px;"> </iframe>
</section>
<!-- <section>
<h1>a little History</h1>
<div style="float:left; width:50%">
<p>Digital maps</p>
<p>GIS software</p>
<p>GIS on the Web is not user friendly.. </p>
<p>1996 Mapquest first with a web service! </p></div>
<img src="presentation/img/mapquest.jpeg" style="float:right; width:50%">
</section> -->
<section>
<h4>One big image is really slow to load..</h4>
<!-- <p>in 2004 Endoxon found a way for quick online mapping! <a href="http://map.search.ch">map.search.ch</a></p>
<p>2005 Google Maps took over!</p> -->
<p> The solution?</p>
<h1 class="fragment grow">Tiles!</h1>
</section>
<section>
<h1>Tiles</h1>
<div style="float:left; width:50%;">
<p>All tiles size 256x256 pixels </p>
<p>Placed in a grid, sharing boundaries </p>
<p> Seamless map </p>
<p class="fragment grow">All these little tiles load way faster than one big map!</p>
<p>We call this slippy maps</p>
</div>
<div style="float:right; width:50%;"> <img src="presentation/img/tiles-loading.gif"></div>
</section>
<section >
<h1>Zoom levels</h1>
<p>Each zoom level has its own set of tiles!</p>
<div style="float:right; width:50%">
<p>Zoom level 0: 1 tile for the whole world.</p>
<p>Increases exponentially...</p>
<p>Zoom level 1: 4 tiles</p>
<p>Zoom level 2: 16 tiles</p>
<p> etc. </p>
</div>
<img src="presentation/img/training-tiling.png" style="float:left; width:50%">
<a href="http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/"> Map with tile bounds</a>
</section>
<section>
<h1>Styling & Serving tiles</h1>
<div style="float: left; width: 50%">
<p>Tiles are styled and rendered in advance</p>
<p>Tiles are just images on the web</p>
<p><a href="http://tile.openstreetmap.org/5/16/10.png">http://tile.openstreetmap.org/5/16/10.png</a></p>
<p>/z/x/y</p>
</div>
<div style="float: right; width: 50%">
<img src="presentation/img/tiles.gif">
</div>
</section>
<section>
<h2>Web Map Building blocks</h2>
<div style="float: left; width: 50%">
<p>Lot's of GeoData</p>
<p>Styled
<p>Rendered Cached Served </p>
<p><b>Base Layer</b></p>
<p>Interface and Interaction</p>
<p><i>Zoom, panning, clicking etc. </i></p>
</div>
<div style="float: left; width: 50%">
<img src="presentation/img/tile_creation.png" >
</div>
</section>
<section>
<h1>Leaflet.js</h1>
<a href="http://leafletjs.com"><img src="presentation/img/leaflet-logo.png"></a>
<p>An Open-Source JavaScript Library for Mobile-Friendly Interactive Maps</p>
<blockquote> simplicity, performance and usability </blockquote>
</section>
<section>
<p>Developed by: <a href="http://agafonkin.com/en/">Vladimir Agafonkin.</a></p>
<p>Weighing about 38 KB of JS. </p>
<p>Has all the mapping features most developers ever need.</p>
<p>Can be extended with <a href="http://leafletjs.com/plugins.html">Plugins</a></p>
<p>Well <a href="http://leafletjs.com/reference-1.2.0.html">documented</a></p>
</section>
<section>
<h1>What Leaflet does not do:</h1>
<p>Provide data for you.</p>
<p>Provide the basemap.</p>
<p>Its not GIS</p>
<h2 class="fragment fade-in">Leaflet is a framework </h2>
</section>
<section>
<h1>Let's make a basic map!</h1>
<p><a href="http://bl.ocks.org/hpfast/555359c331c5f72cdea49375abee11a2">bl.ocks.org > Base map in WebMercator</a></p>
<p>Sooo many styles provided <a href="http://leaflet-extras.github.io/leaflet-providers/preview/">have a look</a></p>
<p><a href="http://bl.ocks.org/hpfast/2155366c06f4ae0fae59df216fc3f7ec">bl.ocks.org > adding WMS overlay</a></p>
</section>
<section>
<h1>Projections in Leaflet</h1>
<p><a href="http://bl.ocks.org/hpfast/3504bcdd15dc7de76a9b1b5fbec2eac9">bl.ocks.org > Base map in RDnew</a></p>
<p><a href="https://kartena.github.io/Proj4Leaflet/">Proj4Leaflet</a></p>
<p><a href="http://proj4js.org/">Proj4js</a></p>
</section>
<section>
<h1>Layers</h1>
<a href="http://bl.ocks.org/hpfast/5017e08b6c27b5abd287c2cf21c0c533">bl.ocks.org > Adding GeoJSON</a>
<div style="float: left; width: 50%;">
<p>Base Layer</p>
<p>Raster</p>
<img src="presentation/img/raster.png" width="500px">
</div>
<div style="float: right; width: 50%;"">
<p>Data Layer / Feature Layer</p>
<p>Vector</p>
<img src="presentation/img/vector_types.png" width="500px">
</div>
</section>
</section>
<!-- Vector Tiles -->
<section data-background="presentation/img/Screenshot5.png">
<section>
<h1>Vector tiles!</h1>
<p>Mapbox GL.js</p>
</section>
<section>
<h1>From Raster to Vector</h1>
<img src="presentation/img/map-tiles-2-w800.png"/>
</section>
<section>
<h1>Vector Tile</h1>
<div style="float:left; width:50%;">
<img src="https://mapzen.com/resources/projects/vector-tiles/square-of-math.gif">
</div>
<div style="float:right; width:50%">
<p> No colours</p>
<p> Arrays in a 256 x 256 matrix</p>
<p> Same tiling schema as Raster png tiles.</p>
<p> Binary format</p>
<p> Simplifies geometries</p>
</div>
</section>
<section>
<h1>Disadvantages Raster Tiles</h1>
<p>No interaction with objects</p>
<p>No information available about objects</p>
<p>Multiple visualizations = multiple tile sets</p>
</section>
<section>
<h1>Advantages Vector tiles</h1>
<p> Rendering is done on client side not by the server</p>
<p> So different clients can style a map different</p>
<p> Small tile size. So faster data transfer. </p>
<p> High resolution.</p>
<p> Direct access to feature information.</p>
</section>
<section>
<h1>Standards</h1>
<a href="https://www.mapbox.com/vector-tiles/specification/">Mapbox Vector Tile Standard. </a>
<p>Based on the binary protocal buffer (.pbf) from Google.</p>
<p><a href="https://www.mapbox.com/blog/vector-tile-adoption/">Standard already used by Esri.</a></p>
<p>Web Mercator projection, Google tiling scheme.</p>
<h1>Formats</h1>
<p>.mvt - .pbf</p>
<p>.mbtiles</p>
</section>
<section>
<h1>Where to get them?</h1>
<p><a href="http://osm2vectortiles.org/">osm2vectortiles</a></p>
<p><a href="https://openmaptiles.org/">https://openmaptiles.org/</a></p>
<p><a href="https://www.mapbox.com/mapbox-studio/">Mapbox Studio </a></p>
<a href="https://openmaptiles.com/hosting/">https://openmaptiles.com/hosting/</a>
<pre><code>https://tile.mapzen.com/mapzen/vector/v1/{layers}/{z}/{x}/{y}.{format}</code></pre>
<pre><code>https://free.tilehosting.com/data/v3.json?key=*****</code></pre>
</section>
<section>
<h1>Bake them yourself</h1>
<div style="float:left; width:50%;">
<img src="http://erictheise.com/geostack-deck/images/Map-nik-cake-osm-7.png">
</div>
<div style="float:right; width:50%;">
<p><a href="http://tegola.io/">Tegola </a></p>
<p><a href="https://github.com/mapbox/tippecanoe">TippeCanoe</a></p>
<p><a href="http://docs.geoserver.org/latest/en/user/extensions/vectortiles/tutorial.html">GeoServer </a></p>
<p> <a href="https://github.com/pka/t-rex">T-rex</a></p>
<p><a href="http://postgis.net/docs//ST_AsMVT.html">PostGIS MVT</a></p>
<p><a href="https://github.com/mapbox/awesome-vector-tiles">More </a> command line tools</p>
<p><a href="http://docs.geoserver.org/latest/en/user/extensions/vectortiles/tutorial.html">GeoServer </a></p>
<p><a href="http://tegola.io/">Tegola </a></p>
</div>
</section>
<section>
<p> NL Amsterdam Datalab.</p>
<pre><code data-trim data-noescape>"https://t1.data.amsterdam.nl/wm/{z}/{x}/{y}.pbf"</code></pre>
<p> PDOK BRT+BGT </p>
<pre><code data-trim data-noescape>"http://geodata.nationaalgeoregister.nl/beta/topotiles/{z}/{x}/{y}.pbf"</code></pre>
</section>
<section>
<h1>How to visualize them?</h1>
<p><a href="https://openlayers.org/en/latest/examples/osm-vector-tiles.html">OpenLayers</a> -- <a href="http://leafletjs.com/plugins.html#vector-tiles">Leaflet</a></p>
<p><a href="https://www.mapbox.com/mapbox-gl-js/api/">MapboxGL</a></p>
<p><a href="https://d3js.org/">D3.js</a></p>
<p><a href="http://maputnik.com/">Maputnik</a></p>
<p><a href="https://www.mapbox.com/mapbox-studio/">Mapbox Studio </a></p>
<p>JavaScript</p>
</section>
<section>
<h1>Let's code!</h1>
<p><a href="https://github.com/NieneB/geo_visualisatie_workshop/blob/master/mapbox-gl-js/01_basemap.html">Simple Mapbox GL.js example </a></p>
<p>WGS84 data only!!</p>
<p><a href="https://github.com/NieneB/geo_visualisatie_workshop/blob/master/mapbox-gl-js/02_mystyle.json">Using PDOK vector tiles</a></p>
<p>GeoJSON data earthquakes</p>
<p><a href="https://bl.ocks.org/NieneB/8b4655519a3e0899d44db9e374d6b8e5">Bl.ocks.org</a> Fonts<p>
<p><a href="https://bl.ocks.org/NieneB/558afb44796a90354954d8af453f76b5">Bl.ocks.org</a> Extrusion</p>
</section>
</section>
<!-- Wrap up -->
<section data-background="presentation/img/Screenshot_background3.png">
<section>
<h1> More info? </h1>
<p>My lists of <p>
<p>interesting links, workshops, presentations and background information: </p>
<p><a href="https://github.com/NieneB/Webmapping_for_beginners/wiki/Interesting-links">for webmapping in general and d3 & Leaflet</a></p>
<p><a href="https://github.com/maptime-ams/vector-tiles-workshop/wiki/Interesting-links">about vector tiles</a></p>
<br/>
<p>Feel free to contact me!</p>
</section>
<section>
<h1>Thank you!</h1>
<p>Niene Boeijen</p>
<p>niene@webmapper.net</p>
</section>
</section>
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