Q&A

Question by group 1

Is the measure of y axis of the graph the count of crashes? Did you consider to 

use something else (for instance the number of fatalities)?

A: Yes it is. We thought about it, but that the most significant type of 

data would have been the number of crash accidents.

Question by group 3

What would your data look like if zoomed in? Can you access information for a 

certain accident?

A: If you zoom in you'll see the single markers displayed. There is a tooltip 

explaining the accident appearing when you tap a crash marker.

Question by group 4

How does multiple states reflect on the map as compared 

to graph and scatter plot?

A: The map is updated with the last state picked

Question by group 5

How much granularity did you put in for age? How was the y-axis 

of age mapped?

A: 10 years. Dynamically, considering the maximum age for that 

set of samples.

Question by group 6

How is the clustering done on map and what amount does the 

different shade represent?

A: It's a k neighbor like clusterization. Gradient is cluster density.

Question by group 7

Why does the map display aggregate and individual data when map

mode changes? Was it a bug or intentional?

A: Single data are displayed if there is no reason to cluster them. K-neighbors is 

used for clusters. They are dynamically computed when position changes.

Question by group 8

Is there another way to select a state, as it seemed difficult to select a state with less values?

Also I will have to spend a couple of seconds to look around for the state. Can the state

be selected from the map?

A:

Question by group 9

How is the color of the clusters determined?

A: It is determined by the number of crashes that belong to that cluster

Question by group 10

Why didn't you choose something other than a slider for the to/from year ranges?

(Sliders are bad on the wall)

A: We implemented a custom working slider.