The VTM collection is a great resource from the 1920s and 1930s that we are woking with as part of our Keck project. David Ackerly, Patrick McIntyre, Jim Thorne and I are working with four different parts of the collection:
- 17,860 plots with digitized vegetation and locality data (UC Berkeley, Geospatial Innovation Facility);
- ~195,000 square kilometers of digitized and georeferenced vegetation maps, covering 45% of the total area of California (UC Davis Information Center for the Environment);
- 20,791 herbarium specimens with locality and collection information (UC Berkeley & Jepson Herbaria); and
- ~ 3,100 digitized photographs (UC Berkeley Marion Koshland Bioscience and Natural Resources Library).
Pretty cool stuff! Some related cool VTM-related work out there:
First, Jim Thorne's fabulous movie about using VTM data to look at change in vegetation: http://vimeo.com/41524838.
And one of his own before and after photos.