This website made available racial dot maps calculated based on 2010 high resolution demographic grids for each county in the conterminous U.S. Data are organized as a zip archive for each state in the conterminous U.S. Each zip archive contain racial dot maps for counties in this state.
Racial dot map include seven separate racial/ethnicity groups: (non Hispanic) whites, blacks, Asians, Native Americans, Pacific Islander, group who declared "Some other race" and Hispanic orgin regardless the race category. Racial category are stored in race_cat field in attribute table.
For more information please see also the Tutorial: "Working with racial dot map in QGIS".
Dowloading racial dot maps
- From the dropdown menu select the name of state where the county is located. Click on "Download" button to download a zip archive with the racial dot maps for all counties in this state. Name of state zip archive contain 2-letters state code (i.e IL indicate Illinois)
- Unzip a downloaded zip archive. Directory will contain another zip archives for each county in the state. Name of county contain 2-letters state code and county name. For example, il_cook.zip indicates Cook county in the state of Illinois.
- Find zip archive with county in question and unzip it. The directory will contain racial dot map in the ESRI Shapefile format for selected county. The QGIS style (dot_map_color.qml) can be used to display dot maps based on racial categories.
Select the state name from the dropdown menu below and click "Downolad"
This work is licensed under a Creative Commons Attribution 4.0 International License. This means that you are free to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material) for any purpose, even commercially, provided attribution is included (appropriate credit and a link to the license).
In addition to Creative Commons Attribution 4.0 International License, we request that publications and research reports employing this data include the following citation:
A. Dmowska and T. F. Stepinski (2019) Racial Dot Maps Based on Dasymetrically Modeled Gridded Population Data, Soc. Sci. 8(5), 157 paper (open access)