diff --git a/templates/admin/followup_theme_graph.html.twig b/templates/admin/followup_theme_graph.html.twig
index 61a8e12..80f5e21 100644
--- a/templates/admin/followup_theme_graph.html.twig
+++ b/templates/admin/followup_theme_graph.html.twig
@@ -262,7 +262,16 @@
     <script>
         const overpassQuery = `{% if overpass_query is defined %}{{ overpass_query|e('js') }}{% endif %}`;
         const mapToken = '{{ maptiler_token }}';
+        // Liste des tags attendus pour la complétion de ce thème
+        const completionTags = {{ completion_tags[theme]|json_encode|raw }};
         let mapInstance = null;
+        const basemaps = {
+            'streets': 'https://api.maptiler.com/maps/streets/style.json?key=' + mapToken,
+            // 'satellite': 'https://data.geopf.fr/annexes/ressources/vectorTiles/styles/BDORTHO/standard.json' // supprimé car non compatible
+        };
+        const IGN_RASTER_ID = 'ign-ortho';
+        const IGN_LAYER_ID = 'ign-ortho-layer';
+        const IGN_RASTER_URL = 'https://wxs.ign.fr/ortho/geoportail/wmts?layer=ORTHOIMAGERY.ORTHOPHOTOS&style=normal&tilematrixset=PM&Service=WMTS&Request=GetTile&Version=1.0.0&Format=image/jpeg&TileMatrix={z}&TileCol={x}&TileRow={y}';
         document.addEventListener('DOMContentLoaded', function() {
             if (!overpassQuery) {
                 document.getElementById('themeMap').innerHTML = '<div class="alert alert-warning">Aucune requête Overpass disponible pour ce thème.</div>';
@@ -271,11 +280,43 @@
             // Initialiser la carte
             mapInstance = new maplibregl.Map({
                 container: 'themeMap',
-                style: 'https://api.maptiler.com/maps/streets/style.json?key=' + mapToken,
+                style: basemaps['streets'],
                 center: [2, 48],
                 zoom: 13
             });
             mapInstance.addControl(new maplibregl.NavigationControl());
+            // Gestion du changement de fond de carte
+            const basemapSelect = document.getElementById('basemapSelect');
+            if (basemapSelect) {
+                basemapSelect.addEventListener('change', function() {
+                    const val = basemapSelect.value;
+                    if (val === 'streets') {
+                        mapInstance.setStyle(basemaps['streets']);
+                    } else if (val === 'satellite') {
+                        // Ajout du raster IGN comme dans JOSM
+                        if (!mapInstance.getSource(IGN_RASTER_ID)) {
+                            mapInstance.addSource(IGN_RASTER_ID, {
+                                'type': 'raster',
+                                'tiles': [IGN_RASTER_URL],
+                                'tileSize': 256,
+                                'attribution': 'Données © IGN BD Ortho',
+                                'scheme': 'tms',
+                                'minzoom': 0,
+                                'maxzoom': 19
+                            });
+                        }
+                        if (!mapInstance.getLayer(IGN_LAYER_ID)) {
+                            mapInstance.addLayer({
+                                'id': IGN_LAYER_ID,
+                                'type': 'raster',
+                                'source': IGN_RASTER_ID,
+                                'minzoom': 0,
+                                'maxzoom': 19
+                            });
+                        }
+                    }
+                });
+            }
             // Requête Overpass
             fetch('https://overpass-api.de/api/interpreter', {
                 method: 'POST',
@@ -309,13 +350,49 @@
                         lat = e.center.lat; lon = e.center.lon;
                     }
                     if (!lat || !lon) return;
+                    // Calcul de la complétion
+                    let filled = 0;
+                    let missingTags = [];
+                    if (completionTags && completionTags.length > 0) {
+                        completionTags.forEach(tag => {
+                            if (e.tags && typeof e.tags[tag] !== 'undefined' && e.tags[tag] !== null && e.tags[tag] !== '') {
+                                filled++;
+                            } else {
+                                missingTags.push(tag);
+                            }
+                        });
+                    }
+                    let completion = completionTags && completionTags.length > 0 ? Math.round(100 * filled / completionTags.length) : null;
+                    // Couleur dégradée du gris au vert intense
+                    function lerpColor(a, b, t) {
+                        // a et b sont des couleurs hex, t entre 0 et 1
+                        const ah = a.replace('#', '');
+                        const bh = b.replace('#', '');
+                        const ar = parseInt(ah.substring(0,2), 16), ag = parseInt(ah.substring(2,4), 16), ab = parseInt(ah.substring(4,6), 16);
+                        const br = parseInt(bh.substring(0,2), 16), bg = parseInt(bh.substring(2,4), 16), bb = parseInt(bh.substring(4,6), 16);
+                        const rr = Math.round(ar + (br-ar)*t);
+                        const rg = Math.round(ag + (bg-ag)*t);
+                        const rb = Math.round(ab + (bb-ab)*t);
+                        return '#' + rr.toString(16).padStart(2,'0') + rg.toString(16).padStart(2,'0') + rb.toString(16).padStart(2,'0');
+                    }
+                    let color = '#cccccc'; // gris par défaut
+                    if (completion !== null) {
+                        color = lerpColor('#cccccc', '#008000', Math.max(0, Math.min(1, completion/100)));
+                    }
+                    // Affichage des tags manquants
+                    let missingHtml = '';
+                    if (missingTags.length > 0) {
+                        missingHtml = `<div style='color:#b30000;font-size:0.95em;margin-top:4px;'><b>Manque :</b> ${missingTags.map(t => `<code>${t}</code>`).join(', ')}</div>`;
+                    }
                     const popupHtml = `<div style='min-width:180px'>
                         <strong>${e.tags && e.tags.name ? e.tags.name : '(sans nom)'}</strong><br>
                         <span class='text-muted'>${e.type} ${e.id}</span><br>
                         <span style='font-size:0.95em;'>${e.tags ? Object.entries(e.tags).map(([k,v]) => `<span><b>${k}</b>: ${v}</span>`).join('<br>') : ''}</span><br>
-                        <a href='https://www.openstreetmap.org/${e.type}/${e.id}' target='_blank'>Voir sur OSM</a>
+                        <b>Complétion :</b> ${completion !== null ? completion + '%' : '–'}
+                        ${missingHtml}
+                        <br><a href='https://www.openstreetmap.org/${e.type}/${e.id}' target='_blank'>Voir sur OSM</a>
                     </div>`;
-                    new maplibregl.Marker({ color: '#198754' })
+                    new maplibregl.Marker({ color: color })
                         .setLngLat([lon, lat])
                         .setPopup(new maplibregl.Popup({ offset: 18 }).setHTML(popupHtml))
                         .addTo(mapInstance);