English operator: Panoramio described at URL: https://web.archive.org/web/20161028060726/http://www.panoramio.com/photo/90600025 determination method...
archive.org/web/20161019153716/http://www.panoramio.com/user/5095076?with_photo_id=63675323 operator: Panoramio described at URL: https://web.archive...
