jm + accuracy   5

Geographically-accurate version of the London underground map
as Boing Boing says: 'London's subway system switched early to an abstract map (PDF), and it became a legendary work of design. It just published an internally-used geographic version of map (PDF), however, for the first time in a century—and it's awesome.'
london  maps  mapping  geography  accuracy  pdf  subway  underground 
september 2015 by jm
Accuweather long-range forecast accuracy questionable
"questionable" is putting it mildly:

Now to to the point: Are the 25-day forecasts any good? In a word, no. Specifically, after running this data, I would not trust a forecast high temperature more than a week out. I’d rather look at the normal (historical average) temperature for that day than the forecast. Similarly, I would not even look at a precipitation forecast more than 6 days in advance, and I wouldn’t start to trust it for anything important until about 3 days ahead of time.
accuweather  accuracy  fail  graphs  data  weather  forecasting  philadelphia 
june 2013 by jm
Persuading David Simon (Pinboard Blog)
Maciej Ceglowski with a strongly-argued rebuttal of David Simon's post about the NSA's PRISM. This point in particular is key:
The point is, you don't need human investigators to find leads, you can have the algorithms do it [based on the call graph or network of who-calls-who]. They will find people of interest, assemble the watch lists, and flag whomever you like for further tracking. And since the number of actual terrorists is very, very, very small, the output of these algorithms will consist overwhelmingly of false positives.
false-positives  maciej  privacy  security  nsa  prism  david-simon  accuracy  big-data  filtering  anti-spam 
june 2013 by jm
Signature-based AV is failing
on average across the AV industry, 40% block rates just after 0-hour of a new malware sample, rising to 60% after 5 days. sounds like the AV industry is losing, if this chart is valid. (via Terry Zink)
via:tzink  malware  av  fail  accuracy  detection  false-negatives  scanners  viruses  from delicious
june 2010 by jm

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