English operator: Panoramio described at URL: https://web.archive.org/web/20161103125655/http://www.panoramio.com/photo/132550819...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102094239/http://www.panoramio.com/photo/122811890...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103165009/http://www.panoramio.com/photo/132201443...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031082837/http://www.panoramio.com/photo/122386184...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103160223/http://www.panoramio.com/photo/130550520...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101182418/http://www.panoramio.com/photo/110529961...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103033255/http://www.panoramio.com/photo/132195968...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103202351/http://www.panoramio.com/photo/132200800 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101075420/http://www.panoramio.com/photo/122810848...
English operator: Panoramio described at URL: https://web.archive.org/web/20161026182109/http://www.panoramio.com/photo/78216759 determination method...