Located in London, I measured the RTT or round trip time to 574,691 random webservers and plotted the times on the globe.
Discovery was done with masscan, measurements using hping and plotting with an old Python script I've revived and enhanced.
This is part of the next writeup on my blog, with which I will be posting any of the code I've used.
Ah yeah ofcourse I was experimenting with comparing it with the lightspeed itself, then inverting it with -1 so its coloured correctly. My mistake not changing the label enough.
Then the scaling goes up to 10
That is actually the real scale, in Europe we get theoretical speeds of 2-3ms according to the speed of light. Real RTT's in Amsterdam for example are around 20ms, so you get values >10. The further you go from the EU, the closer to ideal times.
It's interesting to see the places where connectivity is much better or worse than the surrounding areas.