Spatiotemporal data at multiple scales:
Topleft: Choropleth maps showing nationallevel costs and utilization. The large green map shows aggregate expenses (20122015). California, Texas, and Florida have the three highest expenses (Question Q6). The small multiple below shows the expense distribution per year (no significant variation). The purple maps show, similarly, the percent utilization (Assigned/Capacity), and a reasonably fair distribution nationwide.
Bottom: Average barcharts. Two bar charts display the average expenses and utilization per state (20122015). The charts provide a quantitative comparison across states and complement the choropleths (Q6).
Topmiddle: Voronoi visualization of test center distribution at regional level (Illinois). Voronoi diagrams partition the region based on distances to test centers. The Voronoi cell intensity is mapped to Assigned/Capacity. The darker a cell, the higher demand in that region (Q5). The partially filled red circle in each cell doubleencodes utilization. Circle size encodes the Center capacity, and the filled area shows the assigned number. Orange markers show population sizes per Zipcode. The region with most test centers in Illinois is the great Chicago area (Q3).
Timothy Luciani, firstname.lastname@example.org Juan Trelles Trabucco, email@example.com Chihua Ma, firstname.lastname@example.org Andrew Burks, email@example.com Manu Mathew Thomas, firstname.lastname@example.org Krishna Bharadwaj, email@example.com Shiwangi Singh, firstname.lastname@example.org Peter Hanula, email@example.com Lei Di, firstname.lastname@example.org G.Elisabeta Marai, email@example.com