una ayuda, hace 2 años hice una ruta por la sierra de gredos donde donde la subimos a google street view y genero una linea azul todo el recorrido y ha estado todo este tiempo, hoy he revisado y prácticamente no tengo linea azul.
este es uno de los enlaces donde se veía la linea azul pero ahora no hay.
I see that some part of the blue line still visible, while in some other part I can see the connected photos but not the blue line.
I recently observed that the rules in Maps about blue lines were changed, and now a blue line seems to disappear if not associated to a road at the maximum distance of 5-10 meters from the line.
So I wanted to make an experiment, and I submitted the whole pathway (around 6 Km, from Plataforma de Gredos to Refugio Laguna Grande de Gredos ), in Google Maps. As the pathway is very well visible there are good possibilities that Google will approve it. I want to see if, once the pathway will be approved, the blue line will be back.
However I cannot say how long the approval will take, as it may vary from 8 hours to 4 months. Stay tuned for the news, i hope it will be approved quickly.
I am happy to inform you that the whole trail is now available in Google Maps (it is the green dotted line that you can see here below in a detail of the map) and it seems that some part of the blue line is visible, even if it change when zooming IN and OUT. My hope is that, if the issue was related to the lack of a pathway, the whole blue line will be back in a few days. In any case, have you reached the help page as suggested by @AngieYC ?