linked-distributed-data/maplibre.html at main · codeforcologne/linked-distributed-data · GitHub

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<!DOCTYPE html>
<html lang="de">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>MapLibre Karte mit GeoJSON</title>
    <link href="https://unpkg.com/maplibre-gl@2.4.0/dist/maplibre-gl.css" rel="stylesheet" />
    <style>
        body {
            margin: 0;
            padding: 0;
        }

        #map {
            width: 100%;
            height: 100vh;
        }

        .popup {
            background-color: white;
            border: 1px solid black;
            border-radius: 5px;
            padding: 10px;
            max-width: 300px;
        }

        .popup img {
            max-width: 100%;
            height: auto;
            border-radius: 5px;
        }
    </style>
</head>

<body>
    <div id="map"></div>

    <script src="https://unpkg.com/maplibre-gl@2.4.0/dist/maplibre-gl.js"></script>
    <script>
        // Map initialisieren
        const map = new maplibregl.Map({
            container: 'map', // ID des Containers
            style: 'https://demotiles.maplibre.org/style.json', // Standard-MapLibre-Stil
            center: [0.0, 0.0], // Startposition (Europa)
            zoom: 2 // Startzoom
        });

        // GeoJSON-Daten laden
        fetch('geojson_results.json')
            .then(response => response.json())
            .then(data => {
                // GeoJSON-Daten zur Karte hinzufügen
                map.on('load', () => {
                    map.addSource('geojson-data', {
                        type: 'geojson',
                        data: data
                    });

                    map.addLayer({
                        id: 'geojson-layer',
                        type: 'circle',
                        source: 'geojson-data',
                        paint: {
                            'circle-radius': 8,
                            'circle-color': '#FF0000',
                            'circle-stroke-width': 2,
                            'circle-stroke-color': '#000000'
                        }
                    });

                    // Popup für Objektinformationen
                    const popup = new maplibregl.Popup({
                        closeButton: true,
                        closeOnClick: true
                    });

                    // Klick-Event für Features
                    map.on('click', 'geojson-layer', (e) => {
                        const feature = e.features[0];
                        const properties = feature.properties;

                        // Popup-Inhalt
                        const popupContent = `
                            <div class="popup">
                                <strong>${properties.name || 'Unbekannt'}</strong><br>
                                <img src="${properties.thumbnail}" alt="${properties.name}" /><br>
                                Lizenz: <a href="${properties.license}" target="_blank">${properties.license || 'Keine Lizenz'}</a><br>
                                Ersteller: ${properties.creator || 'Unbekannt'}<br>
                                Webseite: <a href="${properties.url}" target="_blank">${properties.url || 'Keine Webseite'}</a>
                            </div>
                        `;

                        // Popup anzeigen
                        popup.setLngLat(e.lngLat)
                            .setHTML(popupContent)
                            .addTo(map);
                    });

                    // Mauszeiger ändern, wenn über ein Feature gefahren wird
                    map.on('mouseenter', 'geojson-layer', () => {
                        map.getCanvas().style.cursor = 'pointer';
                    });

                    map.on('mouseleave', 'geojson-layer', () => {
                        map.getCanvas().style.cursor = '';
                    });
                });
            })
            .catch(error => console.error('Fehler beim Laden des GeoJSON:', error));
    </script>
</body>

</html>