GIS Data Catalog

2010 Census Tracts for King County - Conflated to Parcels

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Summary

In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for other geographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles.

Description

The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB).

The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation.

Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and Census blocks are relatively small in area; for example, a block in a city bounded by streets.

However, census blocks in remote areas are often large and irregular and may even be many square miles in area.

A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks.

As a result, all 2010 Census blocks nest within every other 2010 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas.

Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands).

Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial A block may consist of one or more faces.

Layer information

Layer Name	tracts10_area
Subject Category	Census
Title	2010 Census Tracts for King County - Conflated to Parcels
Feature Count	398
Feature Type	Polygon
Next Update	None planned
Spatial reference	EPSG:2926
Control ID	860
Place Keywords	53033, Washington State, King County, WA, Pacific NW
Theme Keywords	Census, Census Block, Demographic, Block, Polygon
Supplemental Information	http://www5.kingcounty.gov/sdc/addl_doc/CustomizedJoinDetail_Tracts.htm

Table Preview

Attribute information

OBJECTID From ESRI	Description Internal feature number. Domain Sequential unique whole numbers that are automatically generated.
GEO_ID_TRT From U.S. Census	Description Geographic Identifier Domain Not Found
SHAPE From ESRI	Description Feature Geometry Domain Coordinates defining the features
FEATURE_ID From King County	Description Unique serial feature identifier Domain Unique integer for each block starting at 10001
TRACT_LBL From U.S. Census Bureau	Description Tract label Domain Cocantenation of literal Tract with full Tract number
TRACT_STR From U.S. Census Bureau	Description Tract number as string Domain String
TRACT_INT From U.S. Census Bureau	Description Tract number as integer Domain Integer
TRACT_FLT From U.S. Census Bureau	Description Tract number as floating point Domain 0.00000000 to 322.10000000 by
TRACT_DEL From U.S. Census Bureau	Description Floating point Tract number as string Domain Floating point value expressed as string
TRTLABEL_FULL From U.S. Census Bureau	Description Block label as full expression of all pertinent levels Domain Cocantenation with spaces of delimited Tract number
TRTLABEL_COMP From U.S. Census Bureau	Description Block label as complete expression of all pertinent levels Domain Cocantenation with spaces of full Tract number
TRTLABEL_TRIM From U.S. Census Bureau	Description Block label as trimmed expression of all pertinent levels Domain Cocantenation with spaces of delimited Tract number
COUNTY_STR From U.S. Census Bureau	Description County identifier as string Domain (no value) - No value 033 - King County
COUNTY_INT From U.S. Census Bureau	Description County identifier as integer Domain 0 - No value 33 - King County
STATE_STR From U.S. Census Bureau	Description State identifier as string Domain (no value) - No value 53 - Washington
STATE_INT From U.S. Census Bureau	Description State identifier as integer Domain 0 - No value 53 - Washington
LEVEL_1 From U.S. Census Bureau	Description State code Domain String
LEVEL_2 From U.S. Census Bureau	Description State code plus County code Domain String
LEVEL_3 From U.S. Census Bureau	Description State code, County code plus Tract code Domain String
TRACT_AREA From ESRI	Description Area of Tract in sq feet. Column necessary as in some joins system area disappears. Domain Not Found
TRACT_PERI No Source Noted	Description Perimiter of Tract in sq feet. Column necessary as in some joins system perimeter disappears. Domain Not Found
LOGRECNO From U.S. Census	Description Logical record number used in joining American Community Survey Data Domain Not Found
Shape.STArea() From SQL Server	Description Returns the area of a geometry instance in square units, based on the spatial reference identifier (SRID) of the geometry. Domain Double
Shape.STLength() From SQL Server	Description Returns the total length of the elements in a geometry instance. Domain Double

Contact information

Maintained by	KCGIS Center
Primary	KCGIS Center giscenter@kingcounty.gov

Terms of Use

License	Terms of use and copyright