SACOG Metadata

Abstract
1990 US Census Blocks are one of several geographies used to compile data for the U. S. Census. They can be aggregated into block groups and further, into the larger tracts. Based on SACOG Census 2000 data.

Originator
US Census Bureau, SACOG GIS Staff

Publication Date
January 2000

Purpose
For use with 1990 US Census data.

Supplementary Information
In heavily urban areas, Census blocks can be the equivalent of a city block. In more rural areas, Census blocks will be much larger Demographics

Contact Person
Joe Concannon
SACOG
1415 "L" Street
Sacramento CA, 95814
Phone: 916-321-9000
Fax: 916-321-9551
Email: jconcannon@sacog.org

Coordinate System
Projected: Lambert Conformal Conic North American Datum of 1983
Geographic: GCS_North_American_1983

Attribute
Name Description
BLOCK Block number only
SQ_MILES Square miles computed from "Area" field
SHAPE Feature geometry.
CTBLKNUM Census tract & block numbers combined
CTRACT Census tract number only
OBJECTID Internal feature number.
Shape Feature geometry.
Shape.area
Shape.len