diff --git a/actions/data4map.js b/actions/data4map.js
index 7ce7d64..d218e28 100644
--- a/actions/data4map.js
+++ b/actions/data4map.js
@@ -2,6 +2,7 @@
 import {DateTime} from "luxon"
 import * as mongo from "../databases/mongo.js"
 import { returnOnError } from "../utilities/reporterror.js"
+import { fetchLatestLAmaxForChips } from '../databases/influx_sql.js'
 
 
 // Default distance for center search ( in km)
@@ -127,6 +128,8 @@ export var getData4map = async (params) => {
             }
         }
     }
+    // Nur Einträge verwenden, die eine ESP-Chipid haben
+    query.chip = { $exists: true }
     try {
         // fetch mapdata from mongodb
         let { properties, err } = await mongo.getallProperties(mongo.properties_collection, query)
@@ -134,19 +137,26 @@ export var getData4map = async (params) => {
             return returnOnError(ret, 'NOPROPSFOUND', getData4map.name)
         }
         let v4map = getValue4Map(typ)
+
+        const chipIds = properties.map(prop => prop.chip?.id).filter(id => id)
+        const result = await fetchLatestLAmaxForChips({ chipids: chipIds})
+        
         for (let sensor of properties) {
+            const resIndex = result.values.findIndex((id) => id.chipid ==  sensor.chip.id)
+            const chpvalues = result.values[resIndex]
             let oneAktData = {}
-            if (sensor.values !== undefined) {
+            if (!((sensor.values === undefined) || (chpvalues === undefined))) {
                 oneAktData = {
                     location: sensor.location[0].loc.coordinates,
                     id: sensor._id,
-                    name: sensor.name[0].name,
+                    name: sensor.chip.name,
                     indoor: sensor.location[0].indoor,
-                    lastseen: sensor.values.timestamp
+                    lastseen: chpvalues.timestamp
                 }
                 let now = new Date().getTime()
                 if(oneAktData.lastseen !== '') {
-                    let diff = now - oneAktData.lastseen.getTime()
+                    const dt = new Date(oneAktData.lastseen).getTime()
+                    let diff = now - dt
                     if (diff >= 365 * 24 * 3600 * 1000) {
                         oneAktData.value = -4
                     } else if (diff >= 30 * 24 * 3600 * 1000) {
@@ -156,15 +166,15 @@ export var getData4map = async (params) => {
                     } else if (diff >= 2 * 3600 * 1000) {
                         oneAktData.value = -1
                     } else {
-                        if (sensor.values !== undefined) {
-                            oneAktData.value = Math.round(sensor.values[v4map] * 100) / 100
+                        if (chpvalues !== undefined) {
+                            oneAktData.value = Math.round(chpvalues[v4map] * 100) / 100
                         }
                     }
                     let weeks = Math.round(diff / (7 * 24 * 3600 * 1000))
                     oneAktData.weeks = weeks
                 }
-                if (sensor.values.timestamp > lastDate) {
-                    lastDate = sensor.values.timestamp
+                if (new Date(oneAktData.lastseen).getTime() > lastDate) {
+                    lastDate = new Date(oneAktData.lastseen).getTime()
                 }
             } else {
                 oneAktData.value = -5 
@@ -176,7 +186,7 @@ export var getData4map = async (params) => {
         ret = {
             err: null,
             options: {
-                lastdate: lastDate,
+                lastdate: new Date(lastDate).toISOString(),
                 count: aktData.length,
                 data: 'map'
             },
diff --git a/databases/influx_sql.js b/databases/influx_sql.js
index dd96146..5ed48d0 100644
--- a/databases/influx_sql.js
+++ b/databases/influx_sql.js
@@ -144,9 +144,11 @@ const transformInfluxResult = (series) => {
                 if (col === 'time') {
                     // Convert timestamp to ISO string for compatibility
                     record.datetime = new Date(row[index]).toISOString()
-                } else {
+                } else if (col.startsWith('DNMS')) {
                     col = col.slice(11)
                     record[col] = row[index]
+                } else {
+                    record[col] = row[index]
                 }
             })
             result.push(record)
@@ -423,5 +425,83 @@ export const fetchNoiseAVGData = async (opts) => {
     return ret
 }
 
+/**
+ * Fetch latest LA_max values for multiple chip IDs
+ * @param {Object} opts - Options object
+ * @param {Array<string>} opts.chipids - Array of chip IDs
+ * @returns {Object} - {err: null, values: [{chipid, LA_max, timestamp}]}
+ */
+export const fetchLatestLAmaxForChips = async (opts) => {
+    let ret = { err: null, values: [] }
+    
+    if (!opts.chipids || !Array.isArray(opts.chipids) || opts.chipids.length === 0) {
+        ret.err = 'No chip IDs provided'
+        logit(`ERROR ${fetchLatestLAmaxForChips.name}: ${ret.err}`)
+        return ret
+    }
+    
+    try {
+        // Build WHERE clause with multiple chip IDs using OR (InfluxQL doesn't support IN)
+        const chipIdConditions = opts.chipids.map(id => `"node" = '${id}'`).join(' OR ')
+        
+        // Query to get latest LA_max for each chip
+        const query = `SELECT "DNMS_noise_LA_max", "node" FROM "DNMS" WHERE (${chipIdConditions}) AND time >= now() - 24h ORDER BY time DESC`
+        
+        let { values: lamaxValues, err: lamaxErr } = await influxRead(query)
+        if (lamaxErr) {
+            ret.err = lamaxErr.toString()
+            logit(`ERROR ${fetchLatestLAmaxForChips.name}: ${ret.err}`)
+            return ret
+        }
+        
+        if (!lamaxValues || !lamaxValues.length || !lamaxValues[0].series) {
+            ret.err = 'NODATA'
+            logit(`ERROR ${fetchLatestLAmaxForChips.name}: No data returned from query`)
+            return ret
+        }
+        
+        // Transform results
+        const allData = transformInfluxResult(lamaxValues[0].series)
+        
+        // Get latest value for each chip (data is already sorted by time DESC)
+        const latestByChip = {}
+        
+        allData.forEach(record => {
+            const chipid = record.node
+            const lamax = record.LA_max
+            
+            // Only keep the first (latest) value for each chip
+            if (!latestByChip[chipid] && lamax !== null && lamax !== undefined) {
+                latestByChip[chipid] = {
+                    chipid: chipid,
+                    LA_max: lamax,
+                    timestamp: record.datetime
+                }
+            }
+        })
+        
+        // Convert to array
+        ret.values = Object.values(latestByChip)
+        
+        // Add null entries for chips without data
+        opts.chipids.forEach(chipid => {
+            if (!latestByChip[chipid]) {
+                ret.values.push({
+                    chipid: chipid,
+                    LA_max: null,
+                    timestamp: null
+                })
+            }
+        })
+        
+    } catch (e) {
+        ret.err = e.toString()
+        logit(`ERROR ${fetchLatestLAmaxForChips.name}: ${ret.err}`)
+        return ret
+    }
+    
+    return ret
+}
+
 // Export write function for compatibility
 export { influxWrite }