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
| |
|