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tombh

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Show HN: Algorithmically finding the longest line of sight on Earth

alltheviews.world
412 points·by tombh·5 mesi fa·181 comments

Packing the world for longest lines of sight

tombh.co.uk
141 points·by tombh·9 mesi fa·53 comments

comments

tombh
·24 giorni fa·discuss
What do you mean by credential theft? Stealing the numbers on the card or a malicious person triggering the contactless payment?
tombh
·2 mesi fa·discuss
I don't know if this is related. But I've been confused as to whether these recommendations are for package-specific configs, or for system-wide home directory configs (~/.npmrc for example)? Or maybe both?
tombh
·3 mesi fa·discuss
Are we talking about `cargo build` here? Because my understanding is that if a lockfile is present and `Cargo.toml` hasn't changed since the lockfile was created then the build is guaranteed to use the versions in the lockfile.

If however `Cargo.toml` has changed then `cargo build` will have to recalculate the lockfile. Hence why it can be useful to be explicit about `cargo build --locked`.
tombh
·4 mesi fa·discuss
They're extremely close! /ɪ/ literally sits next to /e/ on the vowel chart https://en.wikipedia.org/wiki/Vowel_diagram#/media/File%3AIP...
tombh
·4 mesi fa·discuss
"Hey", /ˈheɪ/, has a dipthong /eɪ/, so é is precisely the first half of that dipthong. It may feel like it's between the “e” in “bet” and “ee” in “see”, but using the dipthong you don't have to guess it.
tombh
·5 mesi fa·discuss
Thanks. I can't see what you mean myself. If you could paste the URL when you click on one of those incorrect views, I'd really appreciate it. For instance, this one seems correct to me https://map.alltheviews.world/longest/-115.69589485755283_36...
tombh
·5 mesi fa·discuss
Oh, that sounds like an error on our part then. I'd really appreciate if you could paste the URL when one of those bad lines is rendered.
tombh
·5 mesi fa·discuss
It's just a matter of storage costs. Even storing a single line of sight for every point on the planet is over 200GB!
tombh
·5 mesi fa·discuss
The AEQD projection radiates from the anchor right? Is that what you mean by polar coordinates? This was my first foray into optimising projections so if you have any insight I'd love to learn.

If you know anything about QGIS plugins please feel free to make a brief write up in our issues https://github.com/AllTheLines/viewview/issues
tombh
·5 mesi fa·discuss
I don't know, but I really want to do it.
tombh
·5 mesi fa·discuss
I see, thanks. So my thinking is that overly dark areas to the North are caused by _relatively_ low visibility. The heatmap is actually dynamically generated for every viewport. So I agree that there has to be some amazing view from those North faces, it's just that they are drowned out by the sheer enormity of the views on the South face.

If were to use absolute global values for the heatmap, then the Himalayas would just appear as pure, washed-out white.

Does that make sense?
tombh
·5 mesi fa·discuss
Actualicé el website! Es mejor así?
tombh
·5 mesi fa·discuss
Agreed, pedantry very much appreciated. Website updated!
tombh
·5 mesi fa·discuss
Sure!
tombh
·5 mesi fa·discuss
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.
tombh
·5 mesi fa·discuss
That sounds really promising. I've made a Github issue to make sure we follow this up https://github.com/AllTheLines/viewview/issues/61
tombh
·5 mesi fa·discuss
Could you post a link to a view that you think might not be right?
tombh
·5 mesi fa·discuss
1) So you're expecting to click and see a line of sight that you've seen in real life? Is it just that each point only every records the _longest_, which not be the best or most notable view? 2) As in, in a good way?
tombh
·5 mesi fa·discuss
Do you think there's any way to automatically create these Google Earth links for each of the longest lines of sight on maps.alltheviews.world?
tombh
·5 mesi fa·discuss
Oh wow, yes, very curious. I believe that is caused by the cleaning of the original NASA data by the creator of https://viewfinderpanoramas.org/dem3.html So whilst they improved the data, it still isn't perfect.

Ultimately we plan to mix in higher resolution data from different more recent surveys.