Burglary Rhythm Maps

A Rhythm Map is a heat map that displays time in the X and Y dimensions. They are an excellent way to visualize repeating patterns in time, such as how crimes occur by hour and data of week. Here we look at some interesting patterns in burglaries in the City of San...

Day/Time Crime Heatmaps

Here is an interactive data application that explores how crime incidents vary over the day of week and time of day. In the checkbox below, select one or more crime types, and the heatmap will show the relative intensity of those crime types over day of week and time...

Visualizing Traffic Accidents

We recently converted the SWITRS database of traffic collisions in California, extracting the records for San Diego County and creating a basic visualization in Tableau Public. Tableau Public is a fantastic data analysis tool, although it takes a bit of training to do...
Crime at Street Segments

Crime at Street Segments

A few weeks ago, we received crime incident data from SANDAG for the years from 2007 to March of 2013. The data has the location of the crime listed as a “hundred block,” so a crime at 1435 Main street would be listed at 1400 Main. Since we don’t...

SANDAG Transportation Resources

SANDAG Senior Research Analyst Mike Calandra sent us some traffic data updates for our Data As a Public Good report. I’m always thrilled when I get to communicate directly with agency analysts, and having them write to me is like an early Christmas. In our Data...

Population Density Maps

Here is some  eye candy, a population density map of Pacific Beach and surrounding neighborhoods. This map was created with a lot of Python code, using the 2010 census shapefiles for census blocks, setting a value for each block as the population of the block divided...