King County GIS Center
King Street Center
201 S. Jackson St.
Suite 706
Seattle, WA 98104
giscenter@kingcounty.gov

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"

 

2020 Census Blocks for King County

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image

Description

Layer name: BLOCKS20
Subject category: census
Title: 2020 Census Blocks for King County
Feature Count: 27686
Feature Type: Polygon
Abstract: This layer contains a unique geographic identifier (GEO_ID_BLK) for each block that is the key field for the data from censuses and surveys such as Decennial Census, Economic Census, American Community Survey, and the Population Estimates Program. Data from many of the Census Bureau’s surveys and censuses, are available at the Census Bureau’s public data dissemination website (https://data.census.gov/). All original TIGER/Line shapefiles and geodatabases with demographic data are available atThe TIGER/Line Shapefiles are extracts of selected geographic and cartographic information from the Census Bureau's Master Address File (MAF)/Topologically Integrated Geographic Encoding and Referencing (TIGER) Database (MTDB). The shapefiles include information for the fifty states, the District of Columbia, Puerto Rico, and the Island areas (American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, and the United States Virgin Islands). The shapefiles include polygon boundaries of geographic areas and features, linear features including roads and hydrography, and point features. These shapefiles do not contain any sensitive data or confidential data protected by Title 13 of the U.S.C.Census blocks are statistical areas bounded on all sides by visible features such as streets, roads, streams, and railroad tracks, and by non-visible boundaries including city, town, and county boundaries. Generally, census blocks are small in area as a block in a city. However, Census blocks in suburban and rural areas may be large, irregular and bounded by a variety of features In remote areas, census blocks may encompass hundreds of square miles. Census Block Numbers—Census blocks are numbered uniquely within the boundaries of each state, county, census tract with a 4-character census block number. The first character of the tabulation block number identifies the block group. A block number can only be unique by using the decennial census state (STATEFP20), county (COUNTYFP20), census tract (TRACTCE20), and block (BLOCKCE20). The entire block number is the GEO_ID_BLK. There is no consistency in block numbers from census to census.Full documentation: https://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2020/TGRSHP2020_TechDoc.pdf
Purpose: 2020 United States Census Bureau block census geography. Converted from Census Bureau TIGER/Line shapefiles and updated with attributes to meet King County GIS standards.
Status:
Updated:
Time period of content: (single date,as YYYYMMDD)::
Time period of content: (date range, as YYYYMMDD):: -
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Yes
Place Keywords: Washington state, King County, WA, Pacific NW,
Theme Keywords: census,
Lineage: Not available

Contacts

Maintained by:
King County GIS Center
Primary: Mary Ullrich, GIS Specialist, 206-477-4420
(How to e-mail a County contact)
Secondary: KCGIS Center; giscenter@kingcounty.gov. This mailbox is monitored during business hours.

Attribute Information

ItemDescriptionDomain
_STATEFP20_Census Bureau code for a state.
_COUNTYFP20_Census Bureau code for a county.
_TRACTCE20_Census Bureau code for a tract.
_BLOCKCE20_Census Bureau code for a block. This is not unique and may appear again in other blocks in neighboring census tracts.
_GEO_ID_BLK_Unique geographic identifier for a block. Used as the key field to join tabular data from the Census Bureau.
_NAME20_Block name.
_MTFCC20_
_UR20_
_UACE20_
_UATYPE20_
_FUNCSTAT20_
_ALAND20_Land area as calculated by Census Bureau.
Range Min:0.0
Range Max:612154443.0
_AWATER20_Water area as calculated by Census Bureau.
Range Min:0.0
Range Max:15299133.0
_INTPTLAT20_
_INTPTLON20_
_Shape_Leng_
Range Min:216.88465197
Range Max:682750.682779
_BLOCK_LBL2_King County name for census block.
_Shape.STArea()_
_Shape.STLength()_


Constraints

Access: Access Constraint: Data is available on GIS Data Portal: http://www5.kingcounty.gov/gisdataportal/Default.aspx

Use: Use Constraint: King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County.