public function spatialAction()
 {
     $form = new FindFilterForm();
     $this->view->form = $form;
     if ($this->getRequest()->isPost() && $form->isValid($this->_request->getPost())) {
         if ($form->isValid($form->getValues())) {
             $params = array('bbox' => $form->getValue('bbox'), 'objectType' => $form->getValue('objecttype'), 'broadperiod' => $form->getValue('broadperiod'));
             $this->process($params);
         } else {
             $form->populate($form->getValues());
         }
     }
 }