map of tor routers

Nick Mathewson nickm at
Tue Feb 20 23:08:10 UTC 2007

On Tue, Feb 20, 2007 at 05:15:49PM -0500, Bryan Fordham wrote:
> I've taken up the task creating a map of tor routers. I have a test image up
> at
> So far I have a mapserver and data on tor routers in a postgis database, so
> I can produce images like the one above. Now that I've figured that out, I'd
> like some comments on how I plan to proceed.
> Basically, my idea at this point is to query a directory server once a day,
> and check for running nodes.

Neat; if you're going to check more often than that, I'd suggest that
you run a Tor client and look in its cache instead.

> I'll add new nodes as they appear, and mark
> ones that are no longer running. I plan to also track if they are stable,
> and an exit node.

Neat stuff!  Keeping historical data might also be cool, so you could
see how the network's geography changed over time.

> I'm not using google maps so I can keep javascript out. I'm using UMN
> MapServer ( for those who are interested in
> such things.

Nice; good idea.

>   I may do a nicer UI (javascript-enabled) for those who aren't
> worried about such things.

Nick Mathewson
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