Untitled

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Карты</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
    <script src="https://maps.api.2gis.ru/2.0/loader.js?pkg=full"></script>


</head>
<body>
<div class="container">
    <button id="open-popup" class="button">Где я?</button>
    <div id="map" style="width:500px; height:400px"></div>
    <script type="text/javascript">
        var openPopupBtn = document.getElementById('open-popup');

        DG.then(function () {
            var map,
                marker;

            map = DG.map('map', {
                center: [54.725001, 55.941269],
                zoom: 20
            });

            marker = DG.marker([54.725001, 55.941269]).addTo(map);
            marker.bindPopup('Вы здесь!');

            openPopupBtn.onclick = function () {
                marker.openPopup();
            }
        });
    </script>
</div>
</body>
</html>