Originator:
U.S. Department of Housing and Urban Development - Office of Policy Development and Research
Publication_Date:
August, 2004
Title:
Boundary Files for Census Summary Levels 080, 090, and 091
Geospatial_Data_Presentation_Form:
vector digital data
Publication_Information:
Publication_Place:
Washington, DC
Publisher:
U.S. Department of Housing and Urban Development
Description:
Abstract:
The U.S. Census Bureau disseminates data at a variety of summary levels, but does not provide boundary files for all of them. Three of those summary levels (080, 090, and 091) are of particular interest to community planners and social scientists. The geographic component of summary level 080 is census tract split by political boundaries, while summary levels 090 and 091 are comprised of block groups split by political boundaries.
The U.S. Census provides a file called USGEO, which contains all the possible census geographical areas that each block is a part of. When joined with the national block layer, this file allows you to build any census geography from the block up. The summary level 080, 090, and 091 shapefiles provided on this site were created by joining the USGEO file to the national layer of blocks and then dissolving on the blocks using the appropriate summary level column provided in the USGEO file.
Purpose:
The boundary files available here are intended to supplement boundary files available from the U.S. Census Bureau. The files available from this site are for community planners interested in working with census tract and block group data that splits by jurisdiction boundaries (summary levels 080, 090, and 091). These shape files are most helpful when linked with census tract and block group data downloaded from the census standard tabulation data, CDBG low/mod area data (summary level 090), or the CHAS 2000 data (summary levels 080 and 091).
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
August, 2004
Currentness_Reference:
publication date
Status:
Progress:
Complete
Maintenance_and_Update_Frequency:
None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:
-187.652154
East_Bounding_Coordinate:
-65.168503
North_Bounding_Coordinate:
71.441059
South_Bounding_Coordinate:
17.831509
Keywords:
Theme:
Theme_Keyword_Thesaurus:
ArcIMS Metadata Server Theme Keywords
Theme_Keyword:
boundaries
Theme_Keyword:
Summary Level 080
Theme_Keyword:
Summary Level 090
Theme_Keyword:
Summary Level 091
Theme_Keyword:
CDBG lowmod
Access_Constraints:
None
Use_Constraints:
Currently, summary level 080, 090, and 091 shapefiles for Puerto Rico and other U.S. island territories are not available for download from the Boundary Files Download Site. If you need to obtain these files, please notify the contact person for these data sets (see Point of Contact section below).
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:
Jon Sperling
Contact_Organization:
U.S. Department of Housing and Urban Development, Office of Policy Development and Research
These data sets were created for the Department of Housing and Urban Development by the Urban Institute, with assistance from Dennison Associates, Inc. and KBM Group, Inc.
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800
Cross_Reference:
Citation_Information:
Originator:
U.S. Department of Housing and Urban Development - Office of Policy Development and Research
A unique logical record number (LOGRECNO in the geographic header) is assigned to all files for a specific geographic entity. This is done so all records for that specific entity can be linked together across files. The LOGRECO is provided only in the Summary Level 090 shapefiles. It is the unique identifier that can be used to join the CDBG lowmod dataset to those shapefiles.
Attribute_Definition_Source:
U.S. Census Bureau
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label:
SUM090
Attribute_Definition:
Unique key identifying split block group. Comprised of state + county + county subdivision + place + tract + urban/rural + block group codes.
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
STATE
Attribute_Definition:
State FIPS code
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
STUSAB
Attribute_Definition:
USPS state abbreviation
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
COUNTY
Attribute_Definition:
County FIPS code
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
CNTY_NAME
Attribute_Definition:
County name
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
COSUB
Attribute_Definition:
County subdivision code. Comprised of state + county + county subdivision codes.
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
COSUB_NAME
Attribute_Definition:
Name of county subdivision.
Attribute_Definition_Source:
U.S. Census Bureau
Attribute:
Attribute_Label:
COSUBPL
Attribute_Definition:
County subdivision - place code. Comprised of state + county + county subdivision + place codes.
| 
