California State Park roads and trails. The data are stored in an ESRI geodatabase and employ subtypes, each with coded value domains. Subtypes are based on a road and trail classification similar to the US Census Bureau TIGER files. This layer currently includes 5 subtypes based on the RouteClass field: 0-Unknown, 5-Local Road, 6-State Park Road, 7-State Park Trail, 8-Other Agency Trail, and 9-Non-system Route. Each is a geodatabase subtype with it own field domains. See the Document "Data Model for Cal State Parks Road & Trail GIS Layers" for details.