New Crime Data

Posted by on Mar 23, 2016 in New Data | 0 comments

When we last requested crime data from SANDAG, 3 years ago, it took four months of negotiation to get them to admit they could produce it, and two more months to get the price down to a reasonable amount.

Last week when I requested an update, I got one clarification email, then a phone call, and the files were in my inbox a few minutes later. Thanks SANDAG! As a bonus, the data is now geocoded to census block and track, making the files more immediately analyzable.

You can find both the old data file and the new one in an Ambry package on our new data repository.

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Data Project Context: Journalism vs Nonprofits

Posted by on Oct 5, 2015 in Commentary | 0 comments

The Data Library works primarily with journalists and nonprofits, but until recently, I hadn’t fully realized how different the processes are in these two environments. We’d been following two different processes, but didn’t have names for them, so it is worthwhile to give the two contexts names, so we can be sure we are working in a process that is comfortable for our clients and partners.

In the Journalist / Exploratory context, the journalist is looking for a story in data, or wants to use data to support a story idea. In either case, the dataset is novel; there is no pre-existing format to follow, and most times, neither the journalist nor the analyst has worked with the data before.

In this context, we follow a light, fast process that produces a lot of graphs and tables to look at different angles. The outputs are very rough, so the plots aren’t properly labeled and table columns can be cryptic. The goal is to sift through the data quickly to find a few gems, and polish them later. We don’t want to spend a lot of time making plots look good if they will never be used.

In this context, we will work directly from IPython and plotly, documenting the process in Google Docs,  and will share with the journalist the IPython Notebooks, which like this one, are complicated, ugly, and not at all suitable for publication, but they are very useful for exploring ideas quickly.

The other context is the Nonprofit / Reporting context, where an organization has a fairly specific goal, most often a well defined report. In this context, the projects run most smoothly when we start with a copy of a previous report, discuss changes to it, and use it as a template. If there isn’t a previous report, we’ll mock up one in Excel first.

In the reporting context, the client doesn’t want to see the rough work, and the IPython notebooks are very confusing and distracting, so we usually share Excel files for data, and load the data into Tableau for presentation and discussion. The Tableau workbooks are much easier to understand, and a whole lot more attractive. Here is an example of a Tableau workbook organized for reporting.

There are other contexts as well, one for programming projects and another for producing datasets for later analysis, but these are the two where proper communication about which context will be used for a project has the most impact on project success.

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SDSU Big Data Hackathon

Posted by on Sep 23, 2015 in News | 0 comments

Big Data Hackathon on Oct 3 at 9AM at SDSU!

On October 3, the Center for Human Dynamics in the Mobile Age will host a Big Data Hackathon at San Diego State University. Contestants will use data analysis and programming to solve civic problems related to water conservation, disaster recovery and crime prevention.  Visit the Devpost website for details and to register,  or hit Github for the tech details and data.


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Maienschein Mandates Machine Readability

Posted by on Apr 9, 2015 in News | 1 comment

Finally, our legislators are getting below the surface of the Open Data issue and addressing one of the deeper plains: Open Data is nearly useless when it is delivered in PDF. To address this problem, our very own Brian Maienschein (well, the inland “us” ) has introduced AB 169, which mandates that when agencies publish open data, it is published in a machine readable format.

Yea! One prayer answered! If you are in district 77, send Maienschein some love, if not, tell your assembly person to get with the program.

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2015 Data Contest Winners

Posted by on Mar 12, 2015 in Analysis, News | 0 comments

We completed our 2015 Data Contest with final presentations and winners at the awards ceremony on Tuesday. Here are the winners and their presentations:

  1. UCSD MAS Data Science, Time and Space Analysis of Food Distribution
  2. irHacker, California Suspensions
  3. Flash and Shadow, A Visual Geographical Study on Location, Availability, Public Transportations and Crime Exposure
  4. A Mathematical Modeling Team, Are Some Teachers Just “Meaner” than Others?

We also have two Honorable Mentions:

Thank you all for participating! The submissions were very valuable for the non-profits that were involved, and we’re looking forward to the contest next year.  Until then, if you’d like to get involved in other nonprofit data analysis projects, join the Practical Data Program for announcements about upcoming projects.

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Data Contest Submissions

Posted by on Mar 10, 2015 in Analysis | 0 comments

We completed the 2015 SDSU Data Contest on Saturday, with a fantastic collection of excellent submissions. The Judges are reviewing them now, but until you learn the winners at the Awards Ceremony on Tuesday, you can see all of the submissions here.

Everyone is welcome at the Awards Ceremony, so follow the link to register.

UCSD MAS Data Science


Flash and Shadow




UCSD / SDSU Alliance

Team IQ

Kearny Komets

A Mathematical Modeling Team

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