Geolocation | MapGL | 2GIS Documentation

Geolocation

Simple example how you can use Geolocation API with MapGL.


<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>2GIS Map API</title>
        <meta name="description" content="Example of a geolocation" />
        <style>
            html,
            body,
            #container {
                margin: 0;
                width: 100%;
                height: 100%;
                overflow: hidden;
            }

            .buttonRoot {
                width: 32px;
                box-shadow: 0 1px 3px 0 rgba(38, 38, 38, 0.5);
                border-radius: 4px;
                display: flex;
                flex-direction: column;
                overflow: hidden;
                background: #fff;
            }

            .button {
                padding: 0;
                outline: 0;
                border: none;
                cursor: pointer;
                background: #fff;
                width: 32px;
                height: 32px;
                color: #262626;
                box-sizing: border-box;
            }

            .button:hover {
                opacity: 0.7;
            }

            .button:active {
                color: #028eff;
            }
        </style>
    </head>
    <body>
        <div id="container"></div>
        <script src="https://mapgl.2gis.com/api/js/v1"></script>
        <script>
            const map = new mapgl.Map('container', {
                center: [55.31878, 25.23584],
                zoom: 13,
                key: 'Your API access key',
            });

            const controlContent = `
                <div class="buttonRoot" id="find-me">
                    <button class="button">
                        <svg
                            xmlns="http://www.w3.org/2000/svg"
                            width="32"
                            height="32"
                            viewBox="0 0 32 32"
                        >
                            <path
                                fill="currentColor"
                                d="M17.89 26.27l-2.7-9.46-9.46-2.7 18.92-6.76zm-5.62-12.38l4.54 1.3 1.3 4.54 3.24-9.08z"
                            />
                        </svg>
                    </button>
                </div>
                <p id="status"></p>
            `;

            const control = new mapgl.Control(map, controlContent, {
                position: 'topLeft',
            });

            const status = control.getContainer().querySelector('#status');
            let circle;

            function success(pos) {
                const center = [pos.coords.longitude, pos.coords.latitude];

                status.textContent = '';
                if (circle) {
                    circle.destroy();
                }

                circle = new mapgl.CircleMarker(map, {
                    coordinates: center,
                    radius: 14,
                    color: '#0088ff',
                    strokeWidth: 4,
                    strokeColor: '#ffffff',
                    stroke2Width: 6,
                    stroke2Color: '#0088ff55',
                });
                map.setCenter(center);
                map.setZoom(16);
            }

            function error() {
                status.textContent = 'Unable to retrieve your location';
            }

            function geoFindMe() {
                if (!navigator.geolocation) {
                    status.textContent = 'Geolocation is not supported by your browser';
                } else {
                    status.textContent = 'Locating…';
                    navigator.geolocation.getCurrentPosition(success, error);
                }
            }

            control
                .getContainer()
                .querySelector('#find-me')
                .addEventListener('click', geoFindMe);
        </script>
    </body>
</html>