Geologic Map of the Lake Mathews 7.5' Quadrangle, Riverside County, California

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/01-479/metadata.faq.html
Description This data set maps and describes the geology of the Lake Mathews 7.5' quadrangle, Riverside County, California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of the following items: (1) a map coverage
Originators Morton, Douglas M. and Weber, F. Harold, Jr.
Publication U.S. Geological Survey Open-File Report 01-479

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Landslide

Polygon delineating the planimetric area of a landslide found in coverages whose names begin with ls, ols, or yls

Label Definition
LS Some regions within landslides were apparently unaffected by the landslide (that is, they represent areas bypassed by the landslide but are within its outer boundaries) This attribute is used to distinguish those areas from the landslide itself.

Mapped area

Polygon in the mm coverages, used to indicate the method by which landslides were identified, found in coverages whose names begin with mm.

Label Definition
MM Mapping method