Change. Sometimes it's just easier to notice it from overhead. That was the point of this week's Mystery Photo, which surfaced from Voyageurs National Park.
Earlier this summer the park offered an evening program for park visitors, and this is how they promoted it:
Aerial photos taken by satellites and aircraft are used to track changes of the forests in and around Voyageurs National Park. By tracking these changes we can provide land managers with information to make informed decisions.
Join Ulf Gafvert and Al Kirschbaum of the National Park Service’s Great Lakes Inventory and Monitoring program on a journey from a satellite in space down to a plot on the ground. Participants will have a bird’s eye view of the changes that have taken place at Voyageurs National Park throughout the years.