Hi Katie,
Welcome back. Yep, well-mapped areas still require maintenance. I've noticed changes in areas where I actively map.
Recently I've seen on this list several good ideas for mapping parties, -I've kind of been suggesting suburban events, Mikel has suggested War of 1812 historical sites, re-mapping is the latest suggestion. Is there a priority area you're thinking of revisiting? Since the weather will soon moderate it's perfect time to queue up a series of mapping events.
Also, are you planning to come to Falls Church on 9 Mar?
-- SEJ
-- twitter: @geomantic
-- skype: sejohnson8
"Common sense is the collection of prejudices acquired by age eighteen." -- Einstein