1

IDENTIFICATION INFORMATION

1.1
Originator
Metro Data Resource Center
Publication date
201104
Title
2010 Block Groups
1.2
Abstract
This data set contains the U.S. Census Bureau's year 2010 block group boundaries for the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area (MSA). Includes population (POP), dwelling units (DU), race and Hispanic attributes. Source: Census redistricting data [P.L. 94-171] summary files.
Purpose
The data are created to serve as base information for use in GIS systems for a variety of planning and analysis purposes.
Supplemental information
1.3Time period of content
2010
1.4
Progress
Complete
Maintenance/update frequency
Annually
1.5

Spatial domain

Description
Clackamas, Columbia, Multnomah, Washington, Yamhill counties, Oregon; Clark, and Skamania counties, Washington
West bounding coordinate
-123.785577699
East bounding coordinate
-121.514394129
North bounding coordinate
46.3886329056
South bounding coordinate
45.07486237
1.6
Theme keyword thesaurus
None
Theme keyword
Census, tract, demographics, census bureau, population, households, dwelling units, districts
Place keyword thesaurus
None
Place keyword
Portland, Columbia County, Multnomah County, Washington County, Clackamas County, Yamhill County, Oregon, Clark County, Skamania County, Washington
1.7Access Constraints
None
1.8Use Constraints
See the RLIS Product Terms and Conditions
1.10
Browse graphic file name
blockgrp2010
Browse graphic file description
Browse graphic file type
PNG
1.13
Filename
blockgrp2010.shp
Data Set
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
2

DATA QUALITY INFORMATION

2.4Horizontal positional accuracy
2.5

Lineage

Process Description
The geometry and attributes were downloaded from the 2010 census redistricting web site located at http://www.census.gov/rdo/data/2010_census.html. Attribute names were chosen by Metro to be consistent with previous census tract layers.
Process date
20110421
3

SPATIAL DATA ORGANIZATION INFORMATION

3.2Direct spatial reference method
Vector
3.3
SDTS point and vector object type
Polygon
Point and vector object count
3.4
Raster object type
NA
Row count
Column count
4

SPATIAL REFERENCE INFORMATION

4.1

Horizontal Coordinate System

Grid coordinate system name
NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601
SPCS zone identifier
5076
Planar distance units
International foot
Horizontal datum name
D_North_American_1983_HARN
5

ENTITY AND ATTRIBUTE INFORMATION

5.2Overview description
Related data files and field descriptions follow:
Table NameColumnSample Domain ValueDefinition
Blockgrp2010.dbf ----Description of the 2010 Census block group polygon attributes.
STATE--State (FIPS)
COUNTY--County (FIPS)
TRACT--Census tract (FIPS)
TRACT_NO--Census tract number in numeric format
BG--Block group (FIPS)
TRBG--Concatenation of TRACT and BG
FIPS--Federal Information Processing Standard (FIPS) code, a nationally unique field that joins to census-provided attribute tables
POP10--Total population
DU10--Dwelling units
VAC10--Vacant dwelling units
WHITE--White alone
BLACK--Black or African American alone
AIAN--American Indian and Alaska Native alone
ASIAN--Asian alone
NHPI--Native Hawaiian and Other Pacific Islander alone
OTHER_RACE--Some Other Race alone
POP_2_RACE--Two or more races
HISPANIC--Hispanic or Latino
6

DISTRIBUTION INFORMATION

6.1
Contact organization
Metro Data Resource Center
Address
600 NE Grand Ave.
City
Portland
State or province
OR
Postal code
97232
Contact voice telephone
503 797-1742
Contact facsimile telephone
503 797-1909
Contact electronic mail address
drc@oregonmetro.gov
6.3Distribution liability
The information in this file was derived from digital databases on Metro's GIS. Care was taken in the creation of this file. Metro cannot accept any responsibility for errors, omissions, or positional accuracy. There are no warranties, expressed or implied.
7

METADATA REFERENCE INFORMATION

7.1
Metadata Date
20110428
7.4
Contact person
Zac Christensen
Contact voice telephone
503 797-1591
Contact facsimilie telephone
503 797-1909
Contact electronic mail address
zac.christensen@oregonmetro.gov
7.5Metadata standard name
FGDC Content Standards for Digital Geospatial Metadata
7.6Metadata standard version
FGDC-STD-001-1998