Several researchers have mapped the dominant forest cover of UMBS properties at several points in history. The original maps were created using on-the-ground reconnaissance and traditional surveying techniques. Most maps describe only dominant canopy, except "1970 vegetation landcover" which describes, overstory, midstory, understory, and groundcover, along with information about the size of aspen and bracken fern. Maps were scanned and digitized using ArcGIS tools in 2014. Map creation and digitization methods were both subject to error, so these data should be treated as spatially imprecise.