GeoMarker attaches contextual data to your point data by determining the census geographic unit in which each point lies and attaching characteristics of that unit to the point record. The initial release of GeoMarker attaches data from the 2019 American Community Survey 5-year data at the census tract level. Future releases of GeoMarker will include additional datasets, geographic levels, and contextual variables. We want to know what additional data are important to you! Please send us your suggestions by emailing [email protected].
Point in Polygon: Determining Points’ Contexts
GeoMarker uses a basic point-in-polygon spatial operation to determine the geographic unit in which each latitude-longitude point is located. GeoMarker uses the 2018 Census Tract, 2018 Tiger/Line + basis shapefile, as provided by NHGIS as the definition of the polygons for the point-in-polygon operation. Contextual variables are derived from the 2018 ACS 5-year (2014-2018) dataset in NHGIS, using the following definitions.
Contextual Variables
| Proportion unemployed | |
|---|---|
| Source Table | B23025. Employment Status for the Population 16 Years and Over |
| Universe | Population 16 years and over |
| Numerator | [ALY3E005] In labor force: Civilian labor force: Unemployed |
| Denominator | [ALY3E003] In labor force: Civilian labor force |
| Proportion population in poverty | |
| Source Table | C17002. Ratio of Income to Poverty Level in the Past 12 Months |
| Universe | Population for whom poverty status is determined |
| Numerator | [ALWVE002] Under .50 +[ALWVE003] .50 to .99 |
| Denominator | [ALWVE001] Total |
| Median household income | |
| Source Table | B19013. Median Household Income in the Past 12 Months (in 2018 Inflation-Adjusted Dollars) |
| Universe | Households |
| Numerator | [ALW1E001] Median household income in the past 12 months (in 2018 inflation-adjusted dollars) |
| Denominator | n/a |
| Income inequality | |
| Source Table | B19083. Gini Index of Income Inequality |
| Universe | Households |
| Numerator | [AMEME001] Gini Index |
| Denominator | n/a |
| Proportion of family households headed by single woman | |
| Source Table | B11001. Household Type (Including Living Alone) |
| Universe | Households |
| Numerator | [ALU9E006] Family households: Other family: Female householder, no husband present |
| Denominator | [ALU9E002] Family households |
| Proportion of occupied housing units that are owner occupied | |
| Source Table | B25003. Tenure |
| Universe | Occupied housing units |
| Numerator | [ALZLE002] Owner occupied |
| Denominator | [ALZLE001] Total |
| Proportion African American | |
| Source Table | B02001. Race |
| Universe | Total population |
| Numerator | [ALUCE003] Black or African American alone |
| Denominator | [ALUCE001] Total |
| Proportion of adults who completed high school | |
| Source Table | B15003. Educational Attainment for the Population 25 Years and Over |
| Universe | Population 25 years and over |
| Numerator | [ALWGE017] Regular high school diploma +[ALWGE018] GED or alternative credential +[ALWGE019] Some college, less than 1 year +[ALWGE020] Some college, 1 or more years, no degree +[ALWGE021] Associate’s degree +[ALWGE022] Bachelor’s degree +[ALWGE023] Master’s degree +[ALWGE024] Professional school degree +[ALWGE025] Doctorate degree |
| Denominator | [ALWGE001] Total |
| Persons per square kilometer | |
| Source Table | B01003. Total Population |
| Universe | Total population |
| Numerator | [ALUBE001] Total |
| Denominator | [ALAND]/1000000 Current land area (2019 TIGER/Line census tracts shapefile), converted to sq km |
| Housing units per square kilometer | |
| Source Table | B25001. Housing Units |
| Universe | Housing units |
| Numerator | [ALZJE001] Total |
| Denominator | [ALAND]/1000000 Current land area (2019 TIGER/Line census tracts shapefile), converted to sq km |
Yost Index Quintiles for Census Tracts
As part of a collaboration between GeoMarker and the ADMIRAL Study (University of Minnesota Medical School, Department of Pediatrics), we are providing data files containing Yost Index quintiles for census tracts. ADMIRAL Study contributing institutions may download Yost index data files for the appropriate years and merge them with their geolocated patient records. You may download ZIP files from the table below; and, when you unzip the files, you will find comma-separated value (CSV) files that contain the Yost Index quintiles.
Instructions
The Yost Index files are available in the table below. Each row in the table represents the year the patient was diagnosed with B-cell acute lymphoblastic leukemia (B-ALL).
- Find the Yost Index file corresponding to the year of diagnosis and download it to your computer
- Unzip the downloaded file
- Merge the Yost Index CSV file with the geocoded patient data file for only those patients diagnosed that same year using the GISJOIN field
- Create an output file containing the following fields:
- STUDYID (unique code used for ADMIRAL Study for samples and data)
- NAACCRGISCoordinateQualityName
- YEAR
- QUINTILE
- Repeat the process for other diagnosis years, as needed
Yost Index Data Files
| Year of diagnosis | |
|---|---|
| 2000 | 2010 |
| 2001 | 2011 |
| 2002 | 2012 |
| 2003 | 2013 |
| 2004 | 2014 |
| 2005 | 2015 |
| 2006 | 2016 |
| 2007 | 2017 |
| 2008 | 2018 |
| 2009 | 2019 |
Yost Index Data File Record Layout
| Variable | Description | Data type |
|---|---|---|
| GISJOIN | GIS Join Match Code | String |
| STATE | State name | String |
| STATEA | State FIPS code | String |
| COUNTY | County name | String |
| COUNTYA | County FIPS code | String |
| TRACTA | Census tract code | String |
| QUINTILE | Yost index quintile for the census tract | Integer |
| YEAR | Year of diagnosis | Integer |