Design 1: Population Data
In this design workshop you will sketch multiple solutions to visualize the world population data.
Submit one document as a group which contains the analysis, sketches and the reflection with the final visualization. Your sketches must be done by hand with pen and paper! You submit your assignment as a A4 pdf file by pushing it into your Github repository (each member of the group should have a copy of it in her/his repo). You will also present the submitted document during next workshop, so that you get feedback from the other groups and the instructor. Preparing slides for the presentation is not necessary.
PART 1  ANALYSIS
Time: ~30 minutes
Take a look at the population data.

What trends do you see in the data?

Analyze how big the differences between various estimates are. Do you see a trend, i.e., do the differences become smaller or larger over time?

Think about these differences relative to the estimates at the respective time points and in absolute terms. When are the uncertainties the largest in absolute, when in relative terms?

Do you think you can faithfully represent the uncertainty and the data in the same plot? Why, or why not?

What effect do you think will the linear interpolation have on the uncertainty?

Is linear interpolation a suitable method for this data?
PART 2  SKETCHING
Time: ~40 minutes
Design four alternative visual representations for representing the data and the uncertainty in the data. Consider different scales, both for time and for population numbers. You should design for an interactive system, i.e., you should not assume that you have to fit all content onto paper. Please take the theory from the video lecture on Graphic design into account. Here are some points you should consider:

To get a feeling for the final visualization, try to draw the data to scale.

Instead of or in addition to showing 5 conflicting lines, develop a visualization that shows the data and the ambiguity. You can use a single visualization, or you can use multiple views.

Your visualization should show the divergence between estimates in absolute terms (i.e., the difference in number of people) as well as in relative terms (i.e., % of divergence/uncertainty relative to a consensus value for a given year).

Your visualization should make it easy to read a specific “consensus number” for every year.
PART 3  Group Reflection
Time: ~60 minutes, or as long as you like. Take your analysis and ideas and discuss your priorities and all your designs. Can you find a consensus which visualization is the best? Come up with one visualization that you agree is ideal.