Description: Polygons showing an interpretation of the relative stability of upland slopes in the Town of San Anselmo, in the upper Ross Valley, Marin County CA. Digitized from a georectified scan of the 1976 Smith Rice Strand map STABILITY SLOPES IN THE UPPER ROSS VALLEY, hosted on MarinMap's server. Original 1976 map scale of 1:12,000. Digitization at 1:2,400 or smaller. Precision of the original 1976 map and the georectification unknown.