Teaching:TUW - UE InfoVis WS 2008/09 - Gruppe 01 - Aufgabe 3

Aufgabenstellung

Beschreibung der Aufgabe 3

Zu beurteilende Grafik

CO2 Emissions

Critics on the table

• Non-data ink is high :
  • Shadowing and the 3-D visualization of the World Map, 3d visualization of the CO2 emissions and rising tides, these objects increase the non-data ink, thus decreasing the data-ink ratio.
  • 3-D CO2 Emission Bars block some the regions which is supposed to convey important information. (Especially the regions in black)
  • The icon, which aims to emphasize regions of poverty, blocks important information and de-emphasizes the data-ink, although this icon doesn't convey a precise information.
  • Consequently the real message or data is not supported in the Graph, which is against the task of visualizing quantitative information.

• The data is unorganized :
  • The essential message of the graph is not clear, CO2 emissions of Regions ? Heat the Poor ? or the rising tides ?
  • It is not clear which data has more priority.
  • The data is not sequenced, thus confusing the readers. In other words there is no direction for order in which data should be read.

• Scales,Plots and Texts :
  • The CO2 Emissions scale on the left side of the graph can't be taken as a reference, cause it is far away from the CO2 emission bars.
  • The negative axis of CO2 Emissions scale refers to nothing, since CO2 emissions can't have a negative value.
  • The 3-D Scatter plot which aims plotting the relationship between time and rising tides has an unclarity. It is not written on the axes what they refer to. Does the x-axis represent rising sea levels in centimeters ? and Does the y-axis refer to time in years ?.
  • It is not easy to guess what the graph is about, because of the missing clear titles and introduction. How should be the graph interpreted by readers ?
  • The sequence could have been clarified with some text, but in the following graph there is no sequence, therefore the current placements of the texts are not helping the readers to find an order in which data should be read.

Corrections on the table

• The main message of the graph is clarified : Co2 emissions related temperature rising won't effect the regions where it comes from as much as the regions with widespread poverty.
• We have reduced the non-data ink by removing the 3-D and shadowing effects.
• The Co2 Emission bars are moved to the uppermost level of the graph, thus emphasizing the data-ink.
• The information is reorganized by separating the graph into 3 parts.

Links

• InfoVis:Wiki UE Homepage

• UE InfoVis

• Gruppe 01