link to 1794 Green's map of Manchester
link to 1832 new electoral boundary map of Manchester
heat map of locations of political meetings, clustering in and around St Ann's Square, Piccadilly, St Peter's Fields, Camp Field, St George's Fields, Ancoats:
View Peterloo victims north in a full screen map
source: Peterloo casualty relief list, John Rylands Library, Manchester, as tabulated in Michael Bush, The Casualties of Peterloo