This layer represents aspect (units=degrees) calculated from elevation data obtained from the PRISM climate group, distributed by Climate Source. From personal communication with Wayne Gibson, it was "based off of GTOPO30 data, and then Barnes filtered to the desired resolution"
Wayne Gibson
PRISM Group
Northwest Alliance for Computational Science & Engineering (NACSE)
2000 Kelley Engineering Center
Oregon State University
Corvallis, Oregon, 97331-5501
Oregon State University
Voice: (541) 737-2531
http://www.prism.oregonstate.edu/
http://www.climatesource.com/
http://www1.gsi.go.jp/geowww/globalmap-gsi/gtopo30/gtopo30.html
SNAP resampled the 2km elevation product to the 1km model resolution by bilinear interpolation, and then calculated aspect.