<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>leaflet wind</title>
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/dat.gui@0.7.6/build/dat.gui.css">
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/leaflet/dist/leaflet.css">
<style type="text/css">
  html, body {
    margin: 0;
    height: 100%;
    width: 100%
  }
  .container {
    width: 100%;
    height: 100%
  }
</style>
<body>

<div id="map" class="container">
  <div st