allsquirrels
Senior Member
I finally found the trick to nabbing a screenshot of my town map on a gamefaq forum thread. Credit goes to chameleonsoup. Maybe this has been covered deep in a different thread on the bell tree forums too? But just in case it hasn't I want to post it prominently so it's easy to search and find on this site too. 
From your mayor's desk, tell Isabelle you want to demolish a public works project. She will show a map on the top screen and a list of all your projects on the bottom. Before selecting anything from the list you have a clear shot of your town's map. Just cancel out after taking your screenshot.
Unfortunately, this doesn't seem to be available for non-mayors. Hope this helps someone!

From your mayor's desk, tell Isabelle you want to demolish a public works project. She will show a map on the top screen and a list of all your projects on the bottom. Before selecting anything from the list you have a clear shot of your town's map. Just cancel out after taking your screenshot.
Unfortunately, this doesn't seem to be available for non-mayors. Hope this helps someone!