diff --git a/application/default/controllers/ServiceController.php b/application/default/controllers/ServiceController.php
index ea6bca06..b8bc6752 100644
--- a/application/default/controllers/ServiceController.php
+++ b/application/default/controllers/ServiceController.php
@@ -58,6 +58,38 @@ class ServiceController extends Zend_Controller_Action
 	}
 
     /*
+    * 查看数据缩略大图
+    */
+    function bigthumbAction()
+    {
+    	$id = (int)$this->_request->getParam('id');
+    	if (empty($id)) {
+    		$uuid = $this->_request->getParam('uuid');
+    		if (empty($uuid)) $this->_redirect('/data');
+    		$where=$this->db->quoteInto('m.uuid = ?',$uuid);
+    	} else {
+    		$where=$this->db->quoteInto('m.id = ?',$id);
+    	}
+    	$sql="select g.id as gid,t.filename,t.filetype from geonetworkmetadata g left join metadata m on g.uuid=m.uuid left join thumbnail t on t.id=m.id where ".$where;
+		$thumb=$this->db->fetchRow($sql);
+		$this->_helper->layout->disableLayout();
+		$this->_helper->viewRenderer->setNoRender();
+		if (empty($thumb['filename'])) {
+			header("Content-Type:image/png");
+			header("Content-Length: " . filesize("images/nothumb.png"));
+			$file=fopen("images/nothumb.png",'r');
+			fpassthru($file);
+			exit;
+		} else {
+			$url=$this->view->config->bigthumb->path.sprintf('%05d',floor(($thumb['gid']+0.1)/100)*100).'-'.sprintf('%05d',ceil(($thumb['gid']+0.1)/100)*100-1)."/".$thumb['gid'];
+			$url.='/public/'.str_replace('_s.','.',$thumb['filename']);	
+			header("Content-Type:image/".$thumb['filetype']);
+			$file=fopen($url,'r');
+			fpassthru($file);
+			exit;
+		}						
+	}
+    /*
     * 搜索, no page, json output
     */
     function searchAction()