English operator: Panoramio described at URL: https://web.archive.org/web/20161024020250/http://www.panoramio.com/photo/51638992 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103044242/http://www.panoramio.com/photo/130019049...
English operator: Panoramio described at URL: https://web.archive.org/web/20161026234834/http://www.panoramio.com/photo/81174914...
English operator: Panoramio described at URL: https://web.archive.org/web/20161021020756/http://www.panoramio.com/photo/58743412...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030000105/http://www.panoramio.com/photo/102235464...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028041427/http://www.panoramio.com/photo/100015393...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031003723/http://www.panoramio.com/photo/117710707...
English operator: Panoramio described at URL: https://web.archive.org/web/20161025042844/http://www.panoramio.com/photo/72279199...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030121626/http://www.panoramio.com/photo/100016089...
English operator: Panoramio described at URL: https://web.archive.org/web/20161021225155/http://www.panoramio.com/photo/58743348...