Sets the NCSS query location latitude and longitude.

def set_query_latlon(self):
        '''
        Sets the NCSS query location latitude and longitude.
        '''

        if (isinstance(self.longitude, list) and
                isinstance(self.latitude, list)):
            self.lbox = True
            # west, east, south, north
            self.query.lonlat_box(self.longitude[0], self.longitude[1],
                                  self.latitude[0], self.latitude[1])
        else:
            self.lbox = False
            self.query.lonlat_point(self.longitude, self.latitude)