The tiffFileClose function frees the passed in file handle through an etif_Close function call.
During this function call, any modifications to the file are performed by copying the original TIFF file over and updating those items that have changed or been added. If significant raster edits have been made (e.g., the file has been created), there may be a delay in closing the file while the raster data is copied from the temporary file within which it was cached.
