A comparative lens can be used to compare two maps, typically for before / after comparisons, with a possibility to exchange the position of each map (above / under). See also:
- cartifact / slides by C. Hoarau
Cities: Before and After series
Banlieue is Beautiful Project
Several comparative lenses can be added separately or together on this map, which illustrates the presence of various artistic entities in conjunction with past and future urban projects.