Articles by Jeremy Heffner

EFF Tool Analyzes your Browser Fingerprint

Online privacy issues are something we’re always conscious about in working on our projects. We gain useful insights into our products by tracking web visitors using Google Analytics, but these same techniques can also be used to maliciously track visitors online.

Electronic Frontier Foundation released a tool that analyzes how unique your browser fingerprint is.  I found it quite interesting that all three browsers on my work computer had unique fingerprints among the 104,584 tests that the site had conducted thus far.

In particular it’s interesting to see how little information needs to be looked at to be unique.   For instance, in Internet Explorer my User Agent string by itself is unique among all of the tests.  The same applies to my combination of browser plugin versions.   In Firefox my User Agent string appears in 1 out of 23.62 browsers, but my browser plugin combination is unique across all of the tests conducted thus far.

How do your browsers compare?  Panopticlick

Netflix Rental Maps

The New York Times has an interesting collection of maps of Netflix rental popularity for major cities (unfortunately not for Philadelphia).   I wonder how much Netflix takes geography into account with their recommendation system.

A Peek Into Netflix Queues

Walkshed NYC Enters NYC Big Apps Contest

We’ve been wrapped up in walkability to bring you Walkshed NYC. Using 10 data collections drawn from the NYC.gov Data Mine, we’ve entered Walkshed into the NYC BigApps competition to provide custom walkability mapping to NYC residents.

Just how much customization?   Sixty billion custom walkability maps for each NYC resident — yes, we said each resident.    Walkshed NYC contains 17 preferences each of which can be set to 11 values—that’s 505,447,028,499,293,771 possible maps that you can select from. Plenty of possibilities for all 8,363,710 NYC residents.

The complexity only begins there. Each of the 17 walkability preferences are made up of 157,715,256 values arranged in a grid to cover the city. The values in your selected preferences need to be combined on the fly to generate your distinct map.    Thank goodness we have DecisionTree to power this immense calculation.

But measuring a city’s walkability is just the beginning.  Planning water resources, land use, better sidewalk networks and bike lanes, and distane from diverse habitats are just a few of the ways that geographic technology can help make our towns and citoes operate in a more sustainable manner.  Also have an obsession with walkability or sustainability?  We need your support and votes.  Voting runs from December 15th – January 7th.

On
December 15th , vote to put walkability on the map.

Explore Walkshed New York

Geolocation on Twitter is Huge

A theme I keep reiterating in presentations is that everything we encounter in daily life has a geographic component.   Tying this geographic component into the technology we use is the key to real transformation in how we consume data in daily life.   Being able to filter and analyze data geographically is the key.  In this vein, I’m quite excited about yesterday’s launch of geolocation on the Twitter API.

Let’s dream for a second.

Let’s imagine being able to collect a realtime feed of what is going on in a particular location through a network of distributed listening nodes.   Let’s imagine being able to process this feed and analyze what is happening in real time.

Maybe we know about a tsunami 10 minutes earlier from villagers that experienced its power.   Maybe we know there was a spike in chatter about a shooting at a military base 3 minutes sooner.   Maybe we can market to consumers better based on how they react to a billboard in Times Square.

I see this dream becoming reality quite soon.   Twitter with geolocation is essentially a network of  distributed listening nodes for geographic data.    I don’t think we can really predict all the novel ways this is going to be used.

Have an idea for Twitter and geographic analysis?  We’d love to hear it:  info@azavea.com

Our NTEN Blog Post: Technology is all about the Eyeballs

Nonprofit technology is about eyeballs — attracting eyeballs, engaging eyeballs, and reporting on eyeballs. Whether the goal is to raise funds, advocate for a cause, or engage constituents, it is all about eyeballs. And here is the thing, we don’t spend enough time figuring out how to analyze those eyeballs.

Read the full post on NTEN’s blog:  Technology is all about the Eyeballs

RedistrictingTheNation.com is Live — Political Gerrymandering Research

I wanted to share a quick note that we launched RedistrictingTheNation.com today.

Redistricting the Nation allows the public to:

  • Enter their address (nation-wide) and view the “shape” of their federal, state, and local election districts.
  • Learn who is in charge of drawing the boundaries of their election districts (e.g., independent commissions or elected representatives).
  • Compare the “compactness” scores of their election district to other, similar districts (less compact and unusually shaped districts are more likely to be gerrymandered).
  • Draw new district boundaries on a map and generate compactness scores for the new district.
2009-10-21_1647-RTNscreenshot

RedistrictingTheNation.com Screenshot