GIS Data Catalog

2020 Consolidated Demographics Index

Learn how to use GIS Open Data 🗺

Use this Data

Links How to use in ArcGIS Pro
Sharing Status	Public

Summary

Combines three demographic characteristics into one category.

English proficiency, people of color, and household income are scored and combined into a equal weighted score.

Description

This layer was originally created to support the STAR Rating System objective EE-4: Equitable Services & Access Community Level Outcomes for King County.

Three demographics are combined into one attribute to determine King County services access analysis by census tract.

Each demographic: English proficiency, people of color, and household income, was applied to census tracts separately.

This demographic information is based on the 2016 - 2020 American Community Survey from the Census Bureau.

The demographic was sorted into five classes using the Natural Breaks classification.

Then each class was given a score: 1 for the first class, 2 for the second class, 3 for the third class, etc. Next, each census tract received a score based on the class it was in: 1 if it was in the first class, 2 if it was in the second class, 3 if it was in the third class, etc. So each census tract will have a score for English proficiency (ESL_Score), a score for people of color (RE_Score), and a score for household income (Income_Score).

These scores were added up (TotalScore) and an evenly weight average was determined (WeightedTotal333333).

Thus each score for the census tracts represents a combination of demographics where lower scores mean a wealthier, less diverse community and higher scores mean more diverse, less wealthy community.

Layer information

Layer Name	demographic_index_area
Subject Category	Census
Title	2020 Consolidated Demographics Index
Feature Count	397
Feature Type	Polygon
Next Update	None planned
Spatial reference	EPSG:2926
Control ID	2687
Place Keywords	Pacific NW, King County, WA, Washington State
Theme Keywords	Census, Demographics, Persons Of Color, Median Income, English, ESL, American Community Survey
Supplemental Information	None

Table Preview

Attribute information

OBJECTID From Esri	Description Internal feature number. Domain Sequential unique whole numbers that are automatically generated.
GEO_ID_TRT From King County	Description Unique identifier for each census tract. Domain Numeric string
FEATURE_ID From King County	Description Unique ID Domain 10153.0 to 45838.0 by
TRACT_LBL From King County	Description Alpha numeric code for each tract. Domain "Tract" followed by tract identifier
LOGRECNO From King County	Description A unique ID for each tract. Domain Integer
ESL_Score From King County	Description English Proficiency Score for tract. Domain Not Found
Income_Score From King County	Description Household Income Score for tract Domain Not Found
RE_Score From King County	Description People of Color Score for tract Domain Not Found
TotalScore From King County	Description Total demographic score for tract. Domain Sum of values from items ESL_Score, Income_Score and RE_Score
WeightedTotal333333 From King County	Description Evenly weighted total of score. Domain Total Score divided by three
Population From King County	Description Total population of tract. Domain 1287.0 to 11041.0 by
Shape From King County	Description Feature geometry. Domain Coordinates defining the features.
NumberofESL From American Community Survey	Description Number of people speaking English as a second langugage. Domain Count as integer
PercentESL From American Community Survey	Description Percent of people speaking English as a second langugage. Domain Percent as floating point
MedianHouseholdIncome From American Community Survey	Description Median household income for census tract. Domain Income in dollars
NumberofPOC From American Community Survey	Description Number of people who identify as a person of color or have Latino/Hispanic ethnicity. Domain Count as integer
PercentPOC From American Community Survey	Description Percent of people who identify as a person of color or have Latino/Hispanic ethnicity. Domain Percent as floating point
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