src/App.tsx

@@ -5,8 +5,8 @@ import { HeatMap } from './components/HeatMap';
 import { FlowMap } from './components/FlowMap';
 import { AnimationPlayer } from './components/AnimationPlayer';
 import { SearchBar } from './components/SearchBar';
-import { fetchData } from './services/DataService';
+import { fetchData, fetchMemberCities } from './services/DataService';
-import type { PeriodStats } from './services/DataService';
+import type { PeriodStats, MemberCity } from './services/DataService';
 import type { Transaction } from './data/mockData';
 import type { TransactionArc } from './data/arcData';
 import { computeStats } from './data/mockData';
@@ -31,8 +31,26 @@ export default function App() {
   const [focusCity, setFocusCity] = useState<string | null>(initialUrlState.city);
   const [panelOpen, setPanelOpen] = useState(false);
   const [infoOpen, setInfoOpen] = useState(false);
+  const [showMembers, setShowMembers] = useState(false);
+  const [memberCities, setMemberCities] = useState<MemberCity[]>([]);
+  const [membersLoading, setMembersLoading] = useState(false);
   const isMobile = useMediaQuery('(max-width: 639px)');
 
+  const toggleMembers = async () => {
+    if (showMembers) { setShowMembers(false); return; }
+    if (memberCities.length > 0) { setShowMembers(true); return; }
+    setMembersLoading(true);
+    try {
+      const cities = await fetchMemberCities();
+      setMemberCities(cities);
+      setShowMembers(true);
+    } catch (err) {
+      console.warn('fetchMemberCities error:', err);
+    } finally {
+      setMembersLoading(false);
+    }
+  };
+
   const animation = useAnimation(transactions, arcs, periodDays, allTimestamps);
 
   // Synchronise l'état dans l'URL (deep link / partage)
@@ -142,7 +160,10 @@ export default function App() {
       {/* Map area */}
       <div className="relative flex-1 min-w-0">
         {viewMode === 'heatmap' ? (
-          <HeatMap transactions={animation.visibleTransactions} />
+          <HeatMap
+            transactions={animation.visibleTransactions}
+            memberCities={showMembers ? memberCities : []}
+          />
         ) : (
           <FlowMap
             arcs={animation.active ? animation.visibleArcs : arcs}
@@ -181,6 +202,21 @@ export default function App() {
           />
         </div>
 
+        {/* Toggle overlay membres DU */}
+        <button
+          onClick={toggleMembers}
+          disabled={membersLoading}
+          title={showMembers ? 'Masquer les membres' : 'Afficher les membres Ğ1 actifs géolocalisés'}
+          className={`absolute ${isMobile ? 'top-40' : 'top-28'} left-4 z-[1001] w-10 h-10 backdrop-blur-sm border rounded-xl flex items-center justify-center text-sm transition-colors
+            ${showMembers
+              ? 'bg-[#00c853]/20 border-[#00c853]/60 text-[#00c853]'
+              : 'bg-[#0a0b0f]/90 border-[#2e2f3a] text-[#6b7280] hover:text-[#00c853]'
+            }`}
+          aria-label="Membres DU"
+        >
+          {membersLoading ? <span className="animate-spin inline-block text-xs">↻</span> : 'DU'}
+        </button>
+
         {/* Period selector — floating over map */}
         <div className={`absolute top-4 z-[1000] ${isMobile ? 'left-16 right-4' : 'left-1/2 -translate-x-1/2'}`}>
           <PeriodSelector

src/components/HeatMap.tsx

@@ -2,6 +2,7 @@ import { useEffect, useRef } from 'react';
 import L from 'leaflet';
 import 'leaflet.heat';
 import type { Transaction } from '../data/mockData';
+import type { MemberCity } from '../services/DataService';
 
 // Leaflet default marker fix (Vite asset pipeline)
 import iconUrl from 'leaflet/dist/images/marker-icon.png';
@@ -10,6 +11,7 @@ L.Icon.Default.mergeOptions({ iconUrl, shadowUrl: iconShadowUrl });
 
 interface HeatMapProps {
   transactions: Transaction[];
+  memberCities?: MemberCity[];
 }
 
 const HEAT_OPTIONS: L.HeatMapOptions = {
@@ -29,10 +31,11 @@ const HEAT_OPTIONS: L.HeatMapOptions = {
   },
 };
 
-export function HeatMap({ transactions }: HeatMapProps) {
+export function HeatMap({ transactions, memberCities = [] }: HeatMapProps) {
   const containerRef = useRef<HTMLDivElement>(null);
   const mapRef = useRef<L.Map | null>(null);
   const heatRef = useRef<L.HeatLayer | null>(null);
+  const memberLayerRef = useRef<L.LayerGroup | null>(null);
   // Two img overlays that cross-fade between each other.
   // The canvas opacity is NEVER touched — it stays at leaflet's default.
   const prevRef = useRef<HTMLImageElement | null>(null);
@@ -59,9 +62,11 @@ export function HeatMap({ transactions }: HeatMapProps) {
     L.control.zoom({ position: 'bottomright' }).addTo(map);
 
     const heat = L.heatLayer([], HEAT_OPTIONS).addTo(map);
+    const memberLayer = L.layerGroup().addTo(map);
 
     mapRef.current = map;
     heatRef.current = heat;
+    memberLayerRef.current = memberLayer;
 
     // Pendant zoom/pan : cache les overlays → le canvas live est visible directement.
     // Après zoom/pan : resynchronise le snapshot sur le canvas redesssiné.
@@ -100,9 +105,33 @@ export function HeatMap({ transactions }: HeatMapProps) {
       map.remove();
       mapRef.current = null;
       heatRef.current = null;
+      memberLayerRef.current = null;
     };
   }, []);
 
+  // Overlay membres DU : cercles proportionnels au nombre de membres par ville
+  useEffect(() => {
+    const layer = memberLayerRef.current;
+    if (!layer) return;
+    layer.clearLayers();
+    if (memberCities.length === 0) return;
+
+    const maxCount = Math.max(...memberCities.map((c) => c.count), 1);
+    for (const city of memberCities) {
+      const radius = 4 + Math.sqrt(city.count / maxCount) * 18;
+      L.circleMarker([city.lat, city.lng], {
+        radius,
+        color:       '#00c853',
+        fillColor:   '#00c853',
+        fillOpacity: 0.18,
+        weight:      1.5,
+        opacity:     0.7,
+      })
+        .bindTooltip(`<b>${city.city}</b><br/>${city.count} membre${city.count > 1 ? 's' : ''}`, { sticky: true })
+        .addTo(layer);
+    }
+  }, [memberCities]);
+
   // Crossfade: two img overlays swap roles each frame.
   // Canvas is never hidden — we only read its pixel data via toDataURL().
   useEffect(() => {

src/services/DataService.ts

@@ -12,8 +12,8 @@
  * Pour activer : définir VITE_USE_LIVE_API=true dans .env.local
  */
 
-import { fetchTransfers, buildIdentityKeyMap, fetchCurrentUD, ss58ToDuniterKey } from './adapters/SubsquidAdapter';
+import { fetchTransfers, buildIdentityKeyMap, fetchCurrentUD, ss58ToDuniterKey, fetchActiveMemberKeys } from './adapters/SubsquidAdapter';
-import { resolveGeoByKeys, cleanCityName } from './adapters/CesiumAdapter';
+import { resolveGeoByKeys, resolveGeoByKeysBatched, cleanCityName } from './adapters/CesiumAdapter';
 import {
   getTransactionsForPeriod,
   computeStats,
@@ -139,6 +139,51 @@ async function fetchLiveTransactions(periodDays: number): Promise<{
   return { geolocated, arcs, totalCount, totalVolume, allTimestamps: rawTransfers.map((t) => t.timestamp) };
 }
 
+// ---------------------------------------------------------------------------
+// Vue dividende universel : membres actifs géolocalisés par ville
+// ---------------------------------------------------------------------------
+
+export interface MemberCity {
+  city:        string;
+  lat:         number;
+  lng:         number;
+  count:       number;
+  countryCode: string;
+}
+
+let memberCitiesCache: { data: MemberCity[]; expiresAt: number } | null = null;
+
+/**
+ * Retourne la liste des villes avec le nombre de membres WoT actifs géolocalisés.
+ * Résultat mis en cache 1 heure (le nombre de membres évolue lentement).
+ * Traite les ~7000 clés en lots de 500 pour ne pas surcharger Cesium+.
+ */
+export async function fetchMemberCities(): Promise<MemberCity[]> {
+  if (memberCitiesCache && Date.now() < memberCitiesCache.expiresAt) return memberCitiesCache.data;
+
+  const duniterKeys = await fetchActiveMemberKeys();
+  const unique = [...new Set(duniterKeys)];
+  const geoMap = await resolveGeoByKeysBatched(unique);
+
+  const cityMap = new Map<string, { lat: number; lng: number; count: number; countryCode: string }>();
+  for (const geo of geoMap.values()) {
+    const city = cleanCityName(geo.city);
+    const existing = cityMap.get(city);
+    if (existing) {
+      existing.count++;
+    } else {
+      cityMap.set(city, { lat: geo.lat, lng: geo.lng, count: 1, countryCode: geo.countryCode });
+    }
+  }
+
+  const data: MemberCity[] = [...cityMap.entries()]
+    .map(([city, v]) => ({ city, ...v }))
+    .sort((a, b) => b.count - a.count);
+
+  memberCitiesCache = { data, expiresAt: Date.now() + 60 * 60 * 1000 };
+  return data;
+}
+
 // ---------------------------------------------------------------------------
 // Public API
 // ---------------------------------------------------------------------------

src/services/adapters/CesiumAdapter.ts

@@ -163,6 +163,23 @@ export async function resolveGeoByKeys(
   return result;
 }
 
+/**
+ * Même que resolveGeoByKeys mais traite les grands tableaux par lots.
+ * Nécessaire pour les 6000+ membres actifs (évite des requêtes ES trop grandes).
+ */
+export async function resolveGeoByKeysBatched(
+  duniterKeys: string[],
+  batchSize = 500,
+): Promise<Map<string, GeoProfile>> {
+  const result = new Map<string, GeoProfile>();
+  for (let i = 0; i < duniterKeys.length; i += batchSize) {
+    const batch = duniterKeys.slice(i, i + batchSize);
+    const partial = await resolveGeoByKeys(batch);
+    for (const [k, v] of partial) result.set(k, v);
+  }
+  return result;
+}
+
 /**
  * Résout les coordonnées de plusieurs membres Ğ1 par leur nom d'identité.
  * Envoie une requête Elasticsearch multi-terms en un seul appel.

src/services/adapters/SubsquidAdapter.ts

@@ -174,6 +174,41 @@ export async function fetchCurrentUD(): Promise<number> {
   }
 }
 
+// ---------------------------------------------------------------------------
+// Membres actifs WoT (isMember = true)
+// ---------------------------------------------------------------------------
+
+const ACTIVE_MEMBERS_QUERY = `
+  query {
+    identities(filter: { isMember: { equalTo: true } }, first: 20000) {
+      nodes {
+        accountId
+        ownerKeyChange(orderBy: BLOCK_NUMBER_ASC, first: 1) {
+          nodes { previousId }
+        }
+      }
+    }
+  }
+`;
+
+/** Retourne la liste des clés SS58 de tous les membres WoT actifs. */
+export async function fetchActiveMemberKeys(): Promise<string[]> {
+  const res = await fetch(SUBSQUID_ENDPOINT, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ query: ACTIVE_MEMBERS_QUERY }),
+  });
+  if (!res.ok) throw new Error(`Subsquid HTTP ${res.status}`);
+  const raw = await res.json();
+  if (raw.errors?.length) throw new Error(raw.errors[0].message);
+
+  return (raw.data.identities.nodes as { accountId: string; ownerKeyChange: { nodes: { previousId: string }[] } }[])
+    .map((node) => {
+      const genesisKey: string = node.ownerKeyChange.nodes[0]?.previousId ?? node.accountId;
+      return ss58ToDuniterKey(genesisKey);
+    });
+}
+
 export interface FetchTransfersResult {
   transfers: RawTransfer[];
   totalCount: number;