The National Center for Earth-surface Dynamics (NCED) hosts many of the GIS coverages:
- Shapefiles: Research and Watershed GIS Boundaries, Eel River to Rivendell — (2004-2015)
- Digital Elevation Models: Bare-earth, Canopy, and Vegetation Height
- Derived DEMs: Slope, Aspect, Flow Accumulation, Contours, Area/cell size (A/B).
- USGS 7.5′ Quads within the Angelo Area