code: def getWkt(self):
          
          gssha_pro_card = self.getCard("#PROJECTION_FILE")
          if gssha_pro_card is None:
              raise ValueError("#PROJECTION_FILE card not found ...")
  
          with tmp_chdir(self.project_directory):
              gssha_prj_file = gssha_pro_card.value.strip('"').strip("'")
              with open(gssha_prj_file) as pro_file:
                  wkt_string = pro_file.read()
              return wkt_string
docs: Returns GSSHA projection WKT string