--- a/gwt-client/src/main/java/org/dive4elements/river/client/server/ChartOutputServiceImpl.java	Tue May 29 11:02:56 2018 +0200
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/server/ChartOutputServiceImpl.java	Tue May 29 11:35:44 2018 +0200
@@ -44,6 +44,7 @@
 
 
     /** Handle a get, collectionOut. */
+    @Override
     public void doGet(HttpServletRequest req, HttpServletResponse resp) {
         log.info("ChartOutputServiceImpl.doGet");
 
@@ -79,13 +80,9 @@
     }
 
 
-    protected Map<String, String> prepareChartAttributes(
-        HttpServletRequest req
-    ) {
+    private Map<String, String> prepareChartAttributes( final HttpServletRequest req ) {
         Map<String, String> attr = new HashMap<String, String>();
 
-        Map params = req.getParameterMap();
-
         attr.put("width", req.getParameter("width"));
         attr.put("height", req.getParameter("height"));
         attr.put("minx", req.getParameter("minx"));
@@ -93,6 +90,7 @@
         attr.put("miny", req.getParameter("miny"));
         attr.put("maxy", req.getParameter("maxy"));
         attr.put("format", req.getParameter("format"));
+        attr.put("export", req.getParameter("export"));
         attr.put("km", req.getParameter("currentKm"));
 
         if (log.isDebugEnabled()) {