diff --git a/lib/dev_config.dart b/lib/dev_config.dart
index f94e24d..2b61dc7 100644
--- a/lib/dev_config.dart
+++ b/lib/dev_config.dart
@@ -37,7 +37,8 @@ const String kClientVersion = '0.9.11';
 const bool kEnableDevelopmentModes = true; // Set to false to hide sandbox/simulate modes and force production mode
 
 // Marker/node interaction
-const int kCameraMinZoomLevel = 10; // Minimum zoom to show nodes or warning
+const int kCameraMinZoomLevel = 10; // Minimum zoom to show nodes (Overpass)
+const int kOsmApiMinZoomLevel = 13; // Minimum zoom for OSM API bbox queries (sandbox mode)
 const Duration kMarkerTapTimeout = Duration(milliseconds: 250);
 const Duration kDebounceCameraRefresh = Duration(milliseconds: 500);
 
diff --git a/lib/widgets/edit_node_sheet.dart b/lib/widgets/edit_node_sheet.dart
index 9e1c110..54ea91d 100644
--- a/lib/widgets/edit_node_sheet.dart
+++ b/lib/widgets/edit_node_sheet.dart
@@ -36,7 +36,7 @@ class EditNodeSheet extends StatelessWidget {
 
         final submittableProfiles = appState.enabledProfiles.where((p) => p.isSubmittable).toList();
         final isSandboxMode = appState.uploadMode == UploadMode.sandbox;
-        final allowSubmit = appState.isLoggedIn && submittableProfiles.isNotEmpty && session.profile.isSubmittable && !isSandboxMode;
+        final allowSubmit = appState.isLoggedIn && submittableProfiles.isNotEmpty && session.profile.isSubmittable;
         
         void _openRefineTags() async {
           final result = await Navigator.push<OperatorProfile?>(
@@ -130,22 +130,6 @@ class EditNodeSheet extends StatelessWidget {
                     ],
                   ),
                 )
-              else if (isSandboxMode)
-                Padding(
-                  padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
-                  child: Row(
-                    children: [
-                      const Icon(Icons.info_outline, color: Colors.blue, size: 20),
-                      const SizedBox(width: 6),
-                      Expanded(
-                        child: Text(
-                          locService.t('editNode.sandboxModeWarning'),
-                          style: const TextStyle(color: Colors.blue, fontSize: 13),
-                        ),
-                      ),
-                    ],
-                  ),
-                )
               else if (submittableProfiles.isEmpty)
                 Padding(
                   padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
diff --git a/lib/widgets/map_view.dart b/lib/widgets/map_view.dart
index b2b911d..a9d67b2 100644
--- a/lib/widgets/map_view.dart
+++ b/lib/widgets/map_view.dart
@@ -129,6 +129,42 @@ class MapViewState extends State<MapView> {
   static Future<void> clearStoredMapPosition() => 
       MapPositionManager.clearStoredMapPosition();
 
+  /// Get minimum zoom level for camera fetching based on upload mode
+  int _getMinZoomForCameras(BuildContext context) {
+    final appState = context.read<AppState>();
+    final uploadMode = appState.uploadMode;
+    
+    // OSM API (sandbox mode) needs higher zoom level due to bbox size limits
+    if (uploadMode == UploadMode.sandbox) {
+      return kOsmApiMinZoomLevel;
+    } else {
+      return kCameraMinZoomLevel;
+    }
+  }
+
+  /// Show zoom warning if user is below minimum zoom level
+  void _showZoomWarningIfNeeded(BuildContext context, double currentZoom, int minZoom) {
+    // Only show warning once per zoom level to avoid spam
+    if (currentZoom.floor() == (minZoom - 1)) {
+      final appState = context.read<AppState>();
+      final uploadMode = appState.uploadMode;
+      
+      final message = uploadMode == UploadMode.sandbox 
+          ? 'Zoom to level $minZoom or higher to see nodes in sandbox mode (OSM API bbox limit)'
+          : 'Zoom to level $minZoom or higher to see surveillance nodes';
+      
+      // Show a brief snackbar
+      ScaffoldMessenger.of(context).clearSnackBars();
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(message),
+          duration: const Duration(seconds: 2),
+          behavior: SnackBarBehavior.floating,
+        ),
+      );
+    }
+  }
+
 
 
   void _refreshCamerasFromProvider() {
@@ -321,11 +357,15 @@ class MapViewState extends State<MapView> {
               });
               
               // Request more cameras on any map movement/zoom at valid zoom level (slower debounce)
-              if (pos.zoom >= 10) {
+              final minZoom = _getMinZoomForCameras(context);
+              if (pos.zoom >= minZoom) {
                 _cameraDebounce(_refreshCamerasFromProvider);
               } else {
                 // Skip nodes at low zoom - report immediate completion (brutalist approach)
                 NetworkStatus.instance.reportNodeComplete();
+                
+                // Show zoom warning if needed
+                _showZoomWarningIfNeeded(context, pos.zoom, minZoom);
               }
             },
           ),