Projection: Lambert Conformal Conic
Datum: NAD27
Zone: California V
Spheroid: Clarke 1866
Units: Feet US
Parameters:
1st standard parallel 34.03333333
2nd standard parallel 35.46666667
central meridian -118
latitude of projection's origin 33.5
false easting (feet) 2000000
false northing (feet) 0
All files have been projected to the above projection including the Valley Wide GIS files.
Kern Council of Governments names its shape file directories based on a modified Spatial Data Standard (SDS) developed by the CADD/GIS Technology Center.
SDS uses a hierarchy of directories to classify data by type. The broadest classifications are called entity sets. Some examples of entity sets are cadastre, hydrology, and transportation. From this level, each entity set is broken down into entity classes. Some examples of entity classes are transportation_air, transportation_railroad, and transportation_vehicle. Entity classes are further divided into specific types of data. For example, the transportation_vehicle entity class contains entity types such as road centerline, road segment, and parking lot.
Once data is placed in an entity type and becomes an entity, a special naming convention is used. The entity's name references the entire directory structure that it is a part of. For example, a road centerline data set would be named trvehrcl. The "tr" refers to the transportation entity set, the "veh" refers to the transportation_vehicle entity class, and the "rcl" refers to the road centerline entity type. Further modifiers can be added to the entity name to distinguish different data sets of similar types. The modifiers are not part of the SDS standard, but Kern COG has found them helpful.
e.g. trvehrcl_kco_strt_cnst_ctrns_99
trvehrcl = SDS entity type name for ArcView/ArcInfo
_kco = real world location of data (Kern County)
_ strt = modifier describing data (state route) - optional
_cnst = secondary modifier (under construction) - optional
_ctrns = source of data (Cal Trans)
_99 = year of data - if known
A copy of the SDS browser with a searchable listing of the standard is available at: