<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Markers 60K</title>
    <link
      rel="stylesheet"
      href="https://unpkg.com/leaflet@1.9.2/dist/leaflet.css"
    />
    <script src="https://unpkg.com/leaflet@1.9.2/dist/leaflet.js"></script>
    <link
      rel="stylesheet"
      href="https://cdnjs.cloudflare.com/ajax/libs/leaflet.markercluster/1.4.1/MarkerCluster.css"
    />

    <link
      