About the blue line of Street View.
In June 2021, that logic for Street View uploads changed a lot.
Of the photos I uploaded after that, the following places were able to draw the longest blue line in caves, tunnels, indoors, etc.
Ikuno Silver Mine https://goo.gl/maps/Y6jBWXFU5ja6BLpG9
Until May 2021, it was easier to draw the blue line.
Here are some examples.
Nishiyama tunnel https://goo.gl/maps/zeJnjiPyM4XYnCyC7
Mezza Village https://goo.gl/maps/rZdJbNMnqjKGgArC6
Mineyama Tunnel https://goo.gl/maps/kGvs9qzz1w7qFbaA6
Hotel in the strait https://goo.gl/maps/qGjEZi2RoNgQD7kC6
I feel that the AI โโfunction of the blue line is steadily deteriorating.
Regarding the tilt of the photo, it has long been known that the street view server makes all the judgments of the top and bottom of the blue-lined photo, and the top and bottom specified by the user are ignored.
However, these days, the behavior is becoming more and more abnormal.
https://www.facebook.com/shotaro.igami/posts/4690915381017910
Of course, I think this unusual behavior is a side effect of making many improvements.
However, Google has turned its focus towards using Street View as a data collection tool for autonomous driving of cars, rather than Street View for people to see the landscape.
And, in places other than Japan, it is no longer possible to draw a blue line such as a promenade with a roadway nearby.