diff --git a/.gitignore b/.gitignore
index 2b377da..8276f97 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 wien_talks/wien_talks_flutter/pubspec.lock
 wien_talks/wien_talks_flutter/android/app/google-services.json
+*.pptx#
diff --git a/wien_talks/FunMap_Presentation.pptx b/wien_talks/FunMap_Presentation.pptx
new file mode 100644
index 0000000..96ac4e9
Binary files /dev/null and b/wien_talks/FunMap_Presentation.pptx differ
diff --git a/wien_talks/wien_talks_flutter/lib/get_location_widget.dart b/wien_talks/wien_talks_flutter/lib/get_location_widget.dart
index 3c190e2..9fe8008 100644
--- a/wien_talks/wien_talks_flutter/lib/get_location_widget.dart
+++ b/wien_talks/wien_talks_flutter/lib/get_location_widget.dart
@@ -25,7 +25,7 @@ class _GetLocationWidgetState extends State<GetLocationWidget> {
           switch (snapshot.connectionState) {
             case ConnectionState.none:
             case ConnectionState.waiting:
-              return CircularProgressIndicator();
+              return Center(child: CircularProgressIndicator());
             case ConnectionState.active:
             case ConnectionState.done:
               {
diff --git a/wien_talks/wien_talks_flutter/lib/location_mgr.dart b/wien_talks/wien_talks_flutter/lib/location_mgr.dart
index 451870c..0893c5c 100644
--- a/wien_talks/wien_talks_flutter/lib/location_mgr.dart
+++ b/wien_talks/wien_talks_flutter/lib/location_mgr.dart
@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:location/location.dart';
 import 'package:mapsforge_flutter/core.dart';
@@ -34,7 +35,7 @@ class LocationMgr {
 
   final SymbolCache symbolCache = FileSymbolCache();
 
-  final JobRenderer jobRenderer = MapOnlineRenderer();
+  final JobRenderer jobRenderer = kIsWeb ? MapOnlineRendererWeb() : MapOnlineRenderer();
 
   final MarkerByItemDataStore markerDataStore = MarkerByItemDataStore();