Artist: Ahmed Kaddoura
Data Encoding
This is a heatmap which encodes the number of calls made to the SF Fire Department from each neighberhood and call type group. An orange color scale is used, and the darker orange a cell is, the more calls of that type were made from that San Francisco neighberhood.
Interactivity
To interact with the visualization, hover your mouse over a cell in the heatmap. When you hover over a cell, a details on demand table will appear that shows the call type group, neighberhood name, and exact value for the number of calls made for that neighborhood and call type. In addition, hovering over a specific cell will highlight it in the heatmap with a grey outline so you know which cell the tooltip corresponds to.
Findings
A finding that can be learned from this visualization is that in all San Francisco neighberhoods, more non-lfe threatening and potentially life-threatening calls are made to the fire department than alarm and fire calls. This finding contributes to our theme by helping contextualize the response time and quality of response for each neighberhood. While the number of calls from each neighberhood is correlated with the number of people living in each neighberhood, this visualization can be used along with the response time visualization to get a better picture of the different needs each neighberhood has from the fire department. For example, while the South of Market and Tenderloin neighberhoods make significantly more calls to the fire department for non-lfe threatening and potentially life-threatening than they do for alarms, the Financial District/South Beach neighberhood makes a number of alarm calls that is much closer to the number of non-lfe threatening and potentially life-threatening calls.
Inspiration
The functionanlity of this heatmap was inspired by this heatmap visualization by Sophie Engle.
The interactivity of this heatmap was inspired by this example by Sophie Engle.
The color legend of this heatmap is inspired by this linear gradient example by Mike Bostock.