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Maplet: A Beginner’s Guide to Getting Started

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How to Build Interactive Maps with Maplet in 30 Minutes

Building an interactive map quickly is possible with Maplet. This step‑by‑step guide assumes you want a web map with markers, popups, basic styling, and simple interactivity (filtering and zoom controls). Follow the timeline below — total time ≈ 30 minutes.

What you’ll need (5 minutes)

  • A code editor (VS Code, Sublime, etc.)
  • A modern browser (Chrome/Firefox)
  • Basic HTML/CSS/JavaScript knowledge
  • Maplet library files or CDN link (assumed available as maplet.js and maplet.css)
  • A small GeoJSON or array of locations (3–10 points)

Example sample data (GeoJSON feature collection):

json
{
“type”: “FeatureCollection”,
  “features”: [
    { “type”:“Feature”, “properties”: {“name”:“Cafe Ruby”,“type”:“Cafe”}, “geometry”:{“type”:“Point”,“coordinates”:[-73.9851,40.7589]} },
    { “type”:“Feature”, “properties”: {“name”:“Green Park”,“type”:“Park”}, “geometry”:{“type”:“Point”,“coordinates”:[-73.9840,40.7605]} }
  ]
}

Project skeleton (3 minutes)

Create an index.html with linked CSS/JS:

html
<!doctype html>
<html>
<head>
  <meta charset=“utf-8” />
  <title>Maplet Quick Map</title>
  <link rel=“stylesheet” href=“maplet.css”>
  <style>html,body,#map{height:100%;margin:0}</style>
</head>
<body>
  <div id=“controls”></div>
  <div id=“map”></div>
  <script src=“maplet.js”></script>
  <script src=“app.js”></script>
</body>
</html>

Initialize the map (5 minutes)

In app.js, initialize Maplet, set map center/zoom, and add a base layer:

javascript
const map = new Maplet.Map(‘map’, {
  center: [40.759, -73.985],
  zoom: 14
});

// add a tile layer (Maplet uses a TileLayer API)
map.addLayer(new Maplet.TileLayer(‘https://tile.openstreetmap.org/{z}/{x}/{y}.png’));

Add markers and popups (6 minutes)

Load your GeoJSON and create interactive markers with popups:

javascript
const data = YOURGEOJSON; // paste or fetch

const markers = new Maplet.LayerGroup();
data.features.forEach(f => {
  const [lon, lat] = f.geometry.coordinates;
  const marker = new Maplet.Marker([lat, lon])
    .bindPopup(</span><span class="token template-string" style="color: rgb(163, 21, 21);"><strong></span><span class="token template-string interpolation interpolation-punctuation" style="color: rgb(57, 58, 52);">${</span><span class="token template-string interpolation">f</span><span class="token template-string interpolation" style="color: rgb(57, 58, 52);">.</span><span class="token template-string interpolation">properties</span><span class="token template-string interpolation" style="color: rgb(57, 58, 52);">.</span><span class="token template-string interpolation">name</span><span class="token template-string interpolation interpolation-punctuation" style="color: rgb(57, 58, 52);">}</span><span class="token template-string" style="color: rgb(163, 21, 21);"></strong><br/>Type: </span><span class="token template-string interpolation interpolation-punctuation" style="color: rgb(57, 58, 52);">${</span><span class="token template-string interpolation">f</span><span class="token template-string interpolation" style="color: rgb(57, 58, 52);">.</span><span class="token template-string interpolation">properties</span><span class="token template-string interpolation" style="color: rgb(57, 58, 52);">.</span><span class="token template-string interpolation">type</span><span class="token template-string interpolation interpolation-punctuation" style="color: rgb(57, 58, 52);">}</span><span class="token template-string template-punctuation" style="color: rgb(163, 21, 21);">);
  markers.add(marker);
});
map.addLayer(markers);
map.fitBounds(markers.getBounds());

Add simple filtering (4 minutes)

Create UI controls to filter by property (e.g., type):

html
<select id=“typeFilter”>
  <option value=“all”>All</option>
  <option value=“Cafe”>Cafe</option>
  <option value=“Park”>Park</option>
</select>

javascript
document.getElementById(‘typeFilter’).addEventListener(‘change’, (e) => {
  const val = e.target.value;
  markers.clear();
  data.features.forEach(f => {
    if (val === ‘all’ || f.properties.type === val) {
      const [lon, lat] = f.geometry.coordinates;
      markers.add(new Maplet.Marker([lat, lon]).bindPopup(</span><span class="token template-string" style="color: rgb(163, 21, 21);"><strong></span><span class="token template-string interpolation interpolation-punctuation" style="color: rgb(57, 58, 52);">${</span><span class="token template-string interpolation">f</span><span class="token template-string interpolation" style="color: rgb(57, 58, 52);">.</span><span class="token template-string interpolation">properties</span><span class="token template-string interpolation" style="color: rgb(57, 58, 52);">.</span><span class="token template-string interpolation">name</span><span class="token template-string interpolation interpolation-punctuation" style="color: rgb(57, 58, 52);">}</span><span class="token template-string" style="color: rgb(163, 21, 21);"></strong></span><span class="token template-string template-punctuation" style="color: rgb(163, 21, 21);">));
    }
  });
});

Add controls and polish (4 minutes)

  • Add zoom/reset buttons using Maplet.Control APIs.
  • Style popups and marker icons (custom SVG or color variants).
  • Debounce filter input if you support text search.

Example: add zoom control

javascript
map.addControl(new Maplet.Control.Zoom({ position: ‘topright’ }));

Performance tips (2 minutes)

  • Cluster markers when you have >200 points (use Maplet.MarkerCluster).
  • Use vector tiles or simplify GeoJSON for large datasets.
  • Lazy-load data by bounding-box queries for very large areas.

Next steps and customization

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