Open Data Day

Interested in open data and using open data to make the world a better place? The fifth annual Open Data Day is set to take place Saturday, March 4, 2017. Open Data Day is an annual celebration of open data all over the world where groups from around the world can create local events where they use open data in their communities. It is an opportunity to show the benefits of open data and encourage the adoption of open data policies in government, business and civil society.

Show the Flow of Donations

It’s that time of year when we’re inundated by campaign ads not only for major offices but also for state propositions and measures. The Sacramento Bee ran a data tracker article showing the top donors for and against these propositions. I really appreciate the research and analysis that went into that piece, but as I was analyzing it myself it occurred to me that this would be another well-suited application of a Sankey diagram.

Using Sankey Flow Diagrams to Show Distribution & Flow

Since creating and publishing the City of Sacramento Budget Interactive Flow Diagram last year for Code for Sacramento’s Open Budget Sacramento project I’ve heard a lot of positive feedback about it. This flow diagram seems to attract and engage people more than any other style of data visualization I’ve produced. People love it. Commonly referred to as a Sankey diagram, alluvial diagram, or flow diagram, these visual representations of how things flow or are distributed and dispersed seem to naturally draw people in to explore and interact with the data.

State of California Building Sustainability Data Visualization

Back in October I participated in a two day hackathon, 25K Find a New Way: CA GreenGov Challenge, put on by the California Department of General Services. The project that I created was an interactive dashboard to explore building sustainability metrics to make it easier to visually identify departments, ZIP codes, building types, & individual buildings that need the most attention to lower site energy use, grid-purchased electricity use, & water use.

Sacramento Daily Temperatures & Precipitation Interactive Data Visualization

According to the National Weather Service, 2015 will go down as one of the hottest years on record in Sacramento. How do recent years’ temperatures compare to those of 50 or 100 years ago? The interactive heat maps below represent over 123 years of Sacramento weather data; daily high temperatures, daily lower temperatures, and daily precipitation. These interactive data visualizations allow you to explore the temperatures and precipitation for almost every day over the last 123 years.

A Noob’s Experience Learning D3

Since I’m a bit of a data visualization enthusiast, I’ve been teaching myself to program interactive data visualizations for a year or two, first using Processing, and most recently, using D3.js. I’ve been programming in one form or another since the mid-90s and Processing came fairly naturally. But D3, which is a JavaScript library for manipulating documents based on data, has been a bit of a struggle.