Posted by tombh 15 hours ago
We go into all the details at https://alltheviews.world
And there's an interactive map with over 1 billion longest lines, covering the whole world at https://map.alltheviews.world Just click on any point and it'll load its longest line of sight.
Some of you may remember Tom's post[1] from a few months ago about how to efficiently pack visibility tiles for computing the entire planet. Well now it's done. The compute run itself took 100s of AMD Turin cores, 100s of GBs of RAM, a few TBs of disk and 2 days of constant runtime on multiple machines.
If you are interested in the technical details, Ryan and I have written extensively about the algorithm and pipeline that got us here:
* Tom's blog post: https://tombh.co.uk/longest-line-of-sight
* Ryan's technical breakdown: https://ryan.berge.rs/posts/total-viewshed-algorithm
This was a labor of love and we hope it inspires you both technically and naturally, to get you out seeing some of these vast views for yourselves!
I did some longshots back in the early days of wifi.
You could probably talk between ends using cheap crappy 446MHz 250mW walkie-talkies though.
But then the actual message would be encoded by very slightly favouring the high or low end of the spread spectrum map as a kind of terribly slow FSK.
Thanks for this tool!
https://www.heywhatsthat.com/ is another bookmark that I had lost to time.
Actually, I was thinking of https://caltopo.com/map.html but your site led me to it.
most points would be on a slope so they would just have a half circle, only peaks themselves would have an all around view.
Cheers
www.climbs.cc
Any chance of writing a QGIS plugin with the algorithm?