101–110 of 114 posts
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Suppose that'll explain why there are at least three airports included in Ireland that have no scheduled services at all: the data's from nearly a decade ago
Interesting. The data is from 2014, which is when I created the visualisation. Perhaps I should auto-update it every so often!
Recently, I was working on a WebGL version that renders all 54,000+ airports and got it working again today after seeing this.It's quite pretty and runs well but needs some love.
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That's really interesting. Do you think it could be related to the effect of map projection biases? Is that a thing dates far enough back to affect settlement decisions?
I haven't done the research but if you look at the kinds of groups that are settled above the Arctic Circle and how they got there, vs how a group would have got to Antarctica, it may just boil down to accessibility. Whalers eventually patrolled Antarctica's seas but, if they tried to farm its shores they didn't get very far. The Polynesian settlers of the South Seas are hard to beat for navigation ability, but one i…
However, the Polynesians were not cold weather people, and the subantarctic islands are extremely remote.
It was hard enough as it was for the Polynesians to settle New Zealand, I can't imagine them settling any further south.
This diagram is oddly selective about which airports it includes. It has some class D airports (Modesto, Santa Maria) but not others (Palo Alto, El Monte, Fullerton). There is no pattern that I can discern other than eliminating airports that are too close to each other, which kind of defeats the purpose of this exercise.
This is probably the most frequently asked question! The data is from here: http://ourairports.com/data/ I had to limit the number of airports displayed for performance reasons. I filtered the airport data so that only those airports with scheduled services and which are denoted "large" or "medium" are included (according to OurAirports), bringing the number down to 2,980.
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It is related. When rocks cool, crystals start to grow from multiple seeds because of thermal/chemical impurities. If the material is sufficiently homogenous in composition and temperature, then the crystals from different seeds will grow at the same rate. When they grow into each other, a boundary between different crystal domains will form. Crystal domains formed this way look like Voronoi cells. The peanut butter…
I know the former bit. I don't see how the latter obviously follows. You're basically saying it's related because it looks the same but it's clear from the picture it looks the same.
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I also consider Voronoi diagrams fun, and in my life I've implemented three different algorithms for generating 2D Voronoi diagrams (or Delaunay triangulations, which are the duals of Voronoi diagrams): 1. Fortune's algorithm [0] 2. The Bowyer-Watson algorithm for generating the Delaunay triangulation incrementally [1] 3. Quickhull (which generates the 3D convex hull of points, which is the 2D delaunay triangulation…
I spent a couple weekends trying to implement Voronoi via Fortune's algorithm in PHP, since there is no existing library for generating them. I couldn't get past the point of creating a seemingly random mass of intersecting lines. My math knowledge is lacking (I'm not good at groking geometry for some reason), so I wasn't sure what was wrong or how to approach fixing it. Maybe I should give Quickhull a go. I think I…
The hardest part of quickhull in 3D is the "horizon" calculation: basically, every time you add a point to the hull, you have to find all the faces that the point can "see", and the horizon of all those faces, and replace them with new faces. This page describes the horizon part well: http://algolist.manual.ru/maths/geom/convhull/qhull3d.php
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I wasn't aware there was anything below the chocolate-like surface, so I understood you to be saying the same thing as grandparent.
Which country are you in? If you like chocolate and peanut butter (and sugar), I recommend trying a Reese's cup :)
Nice one, actually all Voronoi diagrams are cool. If only there was a webpage/software where someone could click/select points on a map (or even better enter coordinates) and a user Voronoi diagram would be created ;-)
This does the job nicely http://alexbeutel.com/webgl/voronoi.html
If only I/we could have some extra time for all those side projects :-(