diff --git a/app/Services/DeviceWarningService.php b/app/Services/DeviceWarningService.php
index 454f8b6..ab18d3e 100644
--- a/app/Services/DeviceWarningService.php
+++ b/app/Services/DeviceWarningService.php
@@ -136,12 +136,12 @@ class DeviceWarningService
             if(strpos($column, ',')){//看是否是并联条件
                 $_columns = explode(',',$column);
                 foreach($_columns as $cc){
-                    $msg.= $fieldNameMap[$cc].'达到'.$log->$cc.$fieldUnitMap[$cc].'值，且';
+                    $msg.= $fieldNameMap[$cc].'达到'.($log->$cc ?? 0).$fieldUnitMap[$cc].'值，且';
                 }
             
                 $msg = mb_substr($msg, 0, -2);
             }else{
-                $msg = $fieldNameMap[$column].'达到'.$log->$column.$fieldUnitMap[$column].'值';
+                $msg = $fieldNameMap[$column].'达到'.($log->$column ?? 0).$fieldUnitMap[$column].'值';
             }
 
             $notices[] = [
diff --git a/public/admin/agricultural-map.png b/public/admin/agricultural-map.png
new file mode 100644
index 0000000..01a5f3a
Binary files /dev/null and b/public/admin/agricultural-map.png differ
diff --git a/public/admin/dashboard-map.png b/public/admin/dashboard-map-old.png
similarity index 100%
rename from public/admin/dashboard-map.png
rename to public/admin/dashboard-map-old.png