Recent Posts

Range plots ≠ dot plots

5 minute read , Posted on July 14, 2018, by Carl V. Lewis

Range plots always have seemed a bit elitist to me. It’s one of those types of charts that people who want to show how skilled they are at visualization use.

Using CartoDB to visualize the relationship between private prisons and incarceration rates

7 minute read , Posted on April 17, 2017, by Carl V. Lewis

The last post I wrote about CartoDB used the CartoDB API and Leaflet.js to produce a hover tooltip map of census data. Looking back, while it’s quite useful to learn CartoDB’s API, it’s now possible to achieve those same visual cues and interactivity without spending time wading through complex, undocumented JavaScript.

Developing an open standard for municipal procurement data

1 minute read , Posted on April 17, 2017, by Carl V. Lewis

When we talk about redundancy and inefficiency in municipal governments, we almost always come back to the complex topic of procurement. That’s why we need open standards for procurment policies more than ever.

My recent family loss, and introducing, my next adventure

4 minute read , Posted on May 30, 2014, by Carl V. Lewis

In the long-overdue 7 months since I last posted here, I’ve gone through one of the most difficult situations of my life – one which I’m not seeking your sympathy for, and also not embarrassed to admit the depression the loss brought on.  I’ll leave all that stuff to Tumblr for you to read should you wish

So long, Savannah, and a new entrepreneurial path

5 minute read , Posted on November 10, 2013, by Carl V. Lewis

This week, I put in my two weeks’ notice at Savannah’s Morning News Media and our parent company, Morris Publishing Group, to move back after the holiday to New York City to join an up-and-coming NYC-based startup. In my year-and-a-half at the helm of the SMN’s digital content and product development strategies, including launching, I learned invaluable management skills, conflict resolution and the courage to push fearlessly for innovation, even when tradition and red...

Tutorial: Building a hover-enabled map using Tilemill

50 minute read , Posted on August 01, 2013, by Carl V. Lewis

This is the first of two tutorials on adding hover interactions to interactive maps using free, open-source tools. Today I wanted to break down the step-by-step process of how I created this interactive, chloropleth map of Georgia population change from 2010 to 2011. While today's tutorial doesn't cover how to add hover states or moving tooltips to your maps, such as those you see in this iteration of the same map made using CartoDB+Leaflet, I'll...