This the BEST and most useful summary I've found for Canada. It's "government issue" . . and seems to be pretty accurate . . even including national parks and seaport zones . . very easy to find the info you need.
https://www.nrc-cnrc.gc.ca/eng/solutions/collaborative/civuas/uav_site_selection_tool.html
UAV Site Selection Tool - National Research Council Canada
It's all of Canada and here's look at part of Southern Ontario details. Each entry shows when it was last updated.
https://www.nrc-cnrc.gc.ca/eng/solutions/collaborative/civuas/uav_site_selection_tool.html
UAV Site Selection Tool - National Research Council Canada
It's all of Canada and here's look at part of Southern Ontario details. Each entry shows when it was last updated.