def output(self):
        '''
        Generate SRTM data wrapper

        @return SRTM Image Wrapper
        '''

        lat_tile_array = np.arange(self.lat_tile_start, self.lat_tile_end+1)
        lon_tile_array = np.arange(self.lon_tile_start, self.lon_tile_end+1)

        lat_grid,lon_grid = np.meshgrid(lat_tile_array, lon_tile_array)

        lat_grid = lat_grid.ravel()
        lon_grid = lon_grid.ravel()