Well, it's always very tricky to discuss what a landscape is, because I don't think there is any one definitive answer. In my mind, a landscape is an expansive area that tends to provide habitat for a number of species. It could be a township. It could be many townships together.
I don't think there is one definitive area that you would say is a landscape. It's simply the approach of thinking about conservation from a broader perspective than thinking about it on an individual project-by-project basis. You need to look at the cumulative impacts of conservation actions, instead of thinking site by site by site.
Look at the landscape in general and at what the needs of that landscape are, as opposed to those of individual specific locations.