public function getColdchainCapacityAction()
 {
     $province = $this->_request->getParam('province', '');
     $district = $this->_request->getParam('district', '');
     $type = $this->_request->getParam('type', '');
     $level = $this->_request->getParam('level', '');
     $level = empty($level) ? 1 : $level;
     $geoModel = new Model_Geo();
     if ($level == 1) {
         $return = $geoModel->getColdChainProvince($type);
     } else {
         if ($level == 4) {
             $return = $geoModel->getColdChainDistrict($province, $type);
         } else {
             $return = $geoModel->getColdchainTehsil($province, $district, $type);
         }
     }
     echo Zend_Json::encode($return);
 }