1.
Graphs in space
A guide to visualizing geospatial networks
Dan Williams

2.
In this talk
● Visualizing data as a graph
● Visualizing geospatial data as a graph

3.
Bags of nodes and edges

4.
Layouts
A good layout puts nodes in the best possible location on the screen

5.
Layouts
Handling huge amounts of data

6.
Styling

7.
Interaction

8.
Interaction

9.
“Hey, can we put that on a map?”

10.
The problem with maps
• Layouts?
• Missing data?
• Interaction?

11.
The problem with maps
• Layouts?
• Missing data?
• Interaction?

12.
So… why was this a good idea?

13.
Interactions
to the rescue
GIS tools
Layers, overlays
and geofencing
Graph
visualization
tools
Filtering and
foregrounding

14.
Handling missing geospatial data

15.
Handling missing geospatial data

16.
Handling missing geospatial data

17.
Handling missing geospatial data

18.
Using the right map

19.
Using the right map

20.
Using the right map

21.
Lessons
Don’t let a requirement for a map
view ruin a good visualization!
• Use interactions whenever you can
• Choose the right data model
• Choose the right map

22.
Thank you
dan@keylines.com