Between the years 1949-1979 the Pacific Southwest research station branch of the U.S. Forest service published two series of maps: 1) The Soil-Vegetation Maps, and 2) Timber Stand Vegetation Maps.
Notes on where to find historical aerial imagery (thanks to Kass Green): The USDA has an archive of aerial imagery in Salt Lake City at APFOhttp://www.fsa.usda.gov/programs-and-services/aerial-photography/index. There is a ArcGIS online map of the tiles and dates of this photos.
A Unique Data Science Summit Yesterday, several of us in the IGIS Program participated remotely in a very interesting summit on data science in agriculture.
Today was WebGIS and the Geoweb (I know, we could do a whole semester), and rounded up some nice resources. Open Street Map interactions (from Vanessa):Here is Overpass Turbo, the OSM data filtering site. https://overpass-turbo.