With the PA-X timeline nearly complete, I’ve decided to reflect on how well it embodies the characteristics the PSRP team and I identified as key to the PA-X data visualizations. These characteristics are extensible, customizable, and shareable.
Extensible: the timeline can accommodate new data without significant changes to the code files I’ve written. If PSRP adds peace agreements to PA-X, up to three changes will need to be made:
(1) Change the data source file to the newly exported CSV file.
(2) Add the new years to the start year and end year drop down lists on the left-hand side of the visualization webpage (if the new CSV file contains agreements that are signed before 1990 or after 2015).
(3) Add the new country and entity names to the two country/entity drop down lists on the left-hand side of the visualization webpage (if the new CSV file contains agreements that were signed by new countries or entities).
The timelines’ axes, the count and proportion calculations, and the size of the timeline visualizations are determined by the data source file, so those will adjust to new data automatically.
Customizable: Thanks to the PSRP team’s continuous feedback this summer , I’ve created dynamic timelines that are responsive to end-user (i.e. political settlements researchers, peace process participants) needs. The filters and color coding of the timelines visualize categories relevant to current PSRP research: human rights, gender, transitional justice, power sharing, political institutions, and agreement stage. The metrics visualized on the timelines are consistent with metrics PSRP researchers use to analyze peace processes: daily and yearly agreement totals, and yearly proportions of agreements that address selected codes. Users can choose to visualize categories individually or in combination, enabling comparisons or aggregations of data across time, location, and category.
What began as a single PA-X timeline has actually become multiple PA-X timelines: one oriented horizontally and three oriented vertically. The horizontal timeline supports the analysis of trends in peace agreements.
The horizontal timeline. Each vertical line represents a peace agreement. The height of the line shrinks if more than one peace agreement was signed on a particular date.
Users can filter the agreements it visualizes by time, location and category. For the location and category filters, users can choose to view any agreement that addresses at least one of the filters they’ve selected, or only agreements that address all filters they’ve selected.
Left: the time, location and category (“code”) filters; and the core information (“agreement details”) of the agreement hovered over on the timeline. Top right: the horizontal timeline displaying agreements for all locations and categories signed from 2000 through 2005, with the hovered agreement displayed as a thick white line. Bottom right: a placeholder content area that will soon be replaced by Mengting’s map.
The horizontal timeline groups agreements by day and year. With the daily grouping, users can hover over each agreement to view its core information, or hover over a daily group to see the total count of agreements signed on that day.
Horizontal timeline of daily groupings, with a tooltip displaying the number of agreements (5) signed on the hovered day (28 November 1990).
With the yearly grouping, users can hover over each agreement to view its core information, view the total count of agreements signed each year, or view the proportion of agreements each year that address the codes they’ve selected.
Horizontal timeline grouping agreements by year. Each horizontal line in the yearly groups represents one agreement that addresses at least one of the eight categories (“codes”).
Horizontal timeline displaying all agreements worldwide signed from 1990 through 1999 and the total count of agreements per year. Each horizontal line in the yearly groups represents one agreement.
Horizontal timeline displaying all agreements worldwide signed from 1990 through 2015, with each horizontal line representing one agreement. Blue horizontal lines indicate the agreements that address Women, Girls and Gender. The blue percentage above each yearly group represents the proportion of agreements for that year, worldwide, that address Women, Girls and Gender.
The vertical timelines supports the comparative analysis of peace agreements across different locations. Users can select one location to view per vertical timeline, all three of which users can filter by the same categories as the horizontal timeline. Additionally, the vertical timelines color-code the agreements by stage.
Three vertical timelines displaying all peace agreements signed between 1990 and 2016 for Bosnia and Herzegovina, for Colombia, and for Northern Ireland. The left-hand Legend explains which Agreement Stage the colors represent. Hovering over an agreement on the vertical timelines displays the agreement’s core information in a tooltip.
As the final step to my summer’s data visualization work with PA-X, I’ll integrate the timeline visualizations with a map visualization that Mengting Bao created. The map visualizes the categorical and geographic distribution of agreements. Mengting represented each agreement with a glyph composed of eight petals (one for each category the PSRP team asked us to visualize). The map places each agreement glyph on the country that signed it. Once the timeline and map visualizations are integrated, a user will be able to hover over an agreement on the horizontal timeline or on the map to see its core information and its glyph. Users will be able to filter the horizontal timeline and map simultaneously with the same time, location and category filters as the horizontal timeline.
In my next post I’ll summarize the complete PA-X visualization webpage, timelines + map!