The darker purple colours represent the 2016 census tracts (called dissemination areas) that contain the highest number of unoccupied dwellings. To learn more details about the tracts with largest counts, zoom into the desired areas by clicking on the “+” sign, then clicking within the boundaries to produce a pop-up box with the details. The names represent the federal ridings, which should help you better situate the high-concentration areas.

Source: Statistics Canada 2016 Census/David McKie