Historical tree surveys of the Umatilla National Forest

The original public land survey for the Umatilla National Forest was completed primarily between 1879 and 1887. Notes from these General Land Office (GLO) surveys provide the earliest systematically recorded information about species composition for national forest system lands in the Blue Mountains of northeastern Oregon and southeastern Washington. Using these historical records we were able to obtain GLO survey point locations as well as tree species and size information for trees found in the survey process. Point locations are included as a shapefile, and trees species and diameter are provided in tabular format.
The GLO survey notes serve as a data source for characterizing presettlement vegetation conditions for the Umatilla National Forest.
Data were published on 08/06/2020. On 11/05/2020 the metadata were updated to include reference to the article associated with these data (Hanberry et al. 2020).