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Wow, glad you had fun exploring. It suddenly made me think of a little feature that I'm not sure we made the best job of exposing. In the little trophy icon tog

by tombh 8mo ago

Wow, glad you had fun exploring. It suddenly made me think of a little feature that I'm not sure we made the best job of exposing. In the little trophy icon toggle on the right, there's the Top Ten list of views, then under those there's a little line that just says "In current viewport: 123km". Did you see that? Did it make sense? I implemented it, so of course I know that it's better than clicking all the points around a peak to find the longest view from a mountain summit. But maybe it's not obvious to other users? What I do is zoom in so that the viewport only contains the area of the summit (or indeed entire country for that matter) that I'm interested in, then I look at that "In current viewport:" line without having to click anything. So using that, I would say that the longest line of sight in North America is from Mount Rainier, at 390km, looking North West into Canada: https://map.alltheviews.world/longest/-121.76853942871094_46.845619201660156 https://map.alltheviews.world/longest/-121.76853942871094_46...

brucehoult 8mo ago
Oh, I missed that! That gives a longest in NZ of 365.3 km from Ruapehu, skirting past close by Tapuae-o-Uenuku (in the Inland Kaikoura Range) to a point on the Seaward Kaikoura Range near the peak of Manakau. Clicking on the actual Manakau peak also gives 365.3 km back to Ruapehu. I can't seem to find a peak to get a reverse path back to Mt Ranier. Everything I try gets stuck in the Olympic Peninsular. (I was there once ... 1998 or so ... a place called Hurricane Ridge IIRC)
- tombh 8mo ago
  Right, I think we need to make that "In current viewport" thing more prominent somehow. So this is the NZ longest line right https://map.alltheviews.world/longest/173.61386108398438_-42.22415542602539 https://map.alltheviews.world/longest/173.61386108398438_-42... One thing to note about finding reverse lines, is that they're not truly mathematically identical because the observer always has a height of 1.65m and the destination is always some point at the surface, therefore 0.0m. It doesn't always make a difference, but it sometimes can.
  - brucehoult 8mo ago
    > So this is the NZ longest line right Yup. I'd think so. > It doesn't always make a difference, but it sometimes can. I guess the obvious case is if there's a point near one end that is higher, but less than 1.65m higher. It really might be better to use ground level at both ends. Or at least the same height at both ends e.g. if there is a person on both peaks.
    - tombh 8mo ago
      The thing about the observer height that I always try to remember is that features really close to the observer can make an exponential difference. Like imagine how simply putting hand in front of your eyes can suddenly make the whole world disappear. So in theory, it is possible that a mere change of a few centimeters in the height of the observer could affect a similarly dramatic change in the view.

by tombh 8mo ago

brucehoult 8mo ago

Oh, I missed that! That gives a longest in NZ of 365.3 km from Ruapehu, skirting past close by Tapuae-o-Uenuku (in the Inland Kaikoura Range) to a point on the Seaward Kaikoura Range near the peak of Manakau. Clicking on the actual Manakau peak also gives 365.3 km back to Ruapehu. I can't seem to find a peak to get a reverse path back to Mt Ranier. Everything I try gets stuck in the Olympic Peninsular. (I was there once ... 1998 or so ... a place called Hurricane Ridge IIRC)

tombh 8mo ago
Right, I think we need to make that "In current viewport" thing more prominent somehow. So this is the NZ longest line right https://map.alltheviews.world/longest/173.61386108398438_-42.22415542602539 https://map.alltheviews.world/longest/173.61386108398438_-42... One thing to note about finding reverse lines, is that they're not truly mathematically identical because the observer always has a height of 1.65m and the destination is always some point at the surface, therefore 0.0m. It doesn't always make a difference, but it sometimes can.
- brucehoult 8mo ago
  > So this is the NZ longest line right Yup. I'd think so. > It doesn't always make a difference, but it sometimes can. I guess the obvious case is if there's a point near one end that is higher, but less than 1.65m higher. It really might be better to use ground level at both ends. Or at least the same height at both ends e.g. if there is a person on both peaks.
  - tombh 8mo ago
    The thing about the observer height that I always try to remember is that features really close to the observer can make an exponential difference. Like imagine how simply putting hand in front of your eyes can suddenly make the whole world disappear. So in theory, it is possible that a mere change of a few centimeters in the height of the observer could affect a similarly dramatic change in the view.