Infographic Design

Looking for help creating your own infographics?  Randy’s infographic and data visualziation design company:

InfoNewt Infographic Design

About

Randy Krum infographic designerRandy Krum

President of InfoNewt.
Data Visualization, Infographic Design, Visual Thinking, Product Development and Marketing professional fascinated by good infographics.  Always looking for better ways to get the point across.

DFW DataViz Meetup

Join the Meetup Group if you’re in the Dallas/Fort Worth area!

Search the Cool Infographics site

Custom Search

 

Subscriptions:

 

Feedburner

The Cool Infographics® Gallery:

How to add the
Cool Infographics button to your:

Cool Infographics iOS icon

- iPhone
- iPad
- iPod Touch

 

Read on Flipboard for iPad and iPhone

Featured in the Tech & Science category

Flipboard icon

Twitter Feed
From the Bookstore

Caffeine Poster

The Caffeine Poster infographic

Google Insights

« Tea & Biscuit Dunking Guide | Main | Shutterstock Global Design Trends 2011 »
Tuesday
Feb212012

The United States of Craigslist

Welcome to The United States of Craiglist! This infographic map, found on the IDV User Experience blog, shows approximately how craigslist divides its geographic zones across the U.S.! Very important for a website who bases its usefulness on location!

WHY?  Locality is inherent to the value of craigslist; I go to craigslist.org but I get kicked over to the local instance of craigslist (my IP address sources me to somewhere in the illustrious Lansing, MI).  But how does craigslist know where to send me?   Some mysterious system of assigning a geocoded IP address to just the right site must be in place…I wonder what that map looks like.


When Ian Clemens proposed the idea, I looked around to find an existing map of craigslist sites-to-areas -maybe even find the lookup that they themselves use. I couldn’t find anything like it.
Whether it matches their system well or not, here is a map that approximates geographic coverage to individual sites using a Voronoi process as a base (more info on process below).  It is at least a start at visualizing the geographic coverage and distribution of the community-driven instances of craigslist.  Shapes like this might provide some useful context for other data, demographic or market information, for instance.  Also, when pulled into VFX, it can serve as an input to some spatial querying on those other metrics.

It’s worth noting that this is not from Craigslist at all, but an outside analysis of the cities from the craigslist site and approximates the geographic areas covered by each.  A complete post about how this map was generated is available here, and they have even made all of the data files available in a number of different formats.  Bonus!

Craigslist doesn’t care about state lines, counties, time zones or voting districts.  They care about defining an area that covers certain population levels that effectively use their service.

Thanks to Jim for sending in the link!

PrintView Printer Friendly Version

EmailEmail Article to Friend

Reader Comments (3)

Okay, does craigslist ignore proxy servers? Many people use proxies, doesn`t this change the whole received area info?
February 22, 2012 | Unregistered CommenterCoylumbridge hotel
that is the power advertisement.. Craigslist rocks..
February 22, 2012 | Unregistered CommenterJai
"Craigslist doesn't care about...voting districts" True, but this method would be a far better way to CREATE voting districts than the current carve-out-my-likely-voters method
March 1, 2012 | Unregistered CommenterJohn G
Comments for this entry have been disabled. Additional comments may not be added to this entry at this time.