Credits
Everything on this site that we did not make ourselves, with its source and its license.
Data sources
The housing authorities
The schedules are published by the housing authorities themselves. Every amount in the dataset comes from an authority’s own document and links to the page it is printed on. The source documents are public documents of their publishers. They are included as published, and their publishers keep their rights.
HUD, Picture of Subsidized Households 2025
Voucher counts for each authority, and from them the shares of vouchers on this site. Published by the U.S. Department of Housing and Urban Development on its HUD USER site.
Internet Archive
Archived copies of schedules that are no longer on an authority’s website, from the Wayback Machine.
us-atlas 3.0.1
State boundaries for the map: the U.S. Census Bureau’s cartographic boundary files, 2017 edition, as TopoJSON. Project page. License: ISC.
US Cities Database
City coordinates, used to place the authorities on the map. By Kelvin S. do Prado. Project page. License: MIT.
Code
These libraries are bundled into one file that the site serves itself. Each license name links to its full text.
| Library | License | Used for |
|---|---|---|
| d3-geo 3.1.1 | ISC | Map projection and drawing |
| d3-composite-projections 2.0.0 | BSD-3-Clause | A US projection that includes Puerto Rico and the island territories |
| topojson-client 3.1.0 | ISC | Reading the state boundaries |
| d3-array 3.2.4 | ISC | Used by d3-geo |
| internmap 2.0.3 | ISC | Used by d3-array |
| d3-path 3.1.0 | ISC | Used by d3-composite-projections |
Fonts
The fonts are subset to Latin characters, converted to WOFF2 and served from this site.
| Font | License | Used for |
|---|---|---|
| Doto | SIL Open Font License 1.1 | Titles and large numbers |
| IBM Plex Sans | SIL Open Font License 1.1 | Text |
Services
Umami Cloud
Counts visits to this site without cookies, as the privacy policy describes. We use its EU region. Umami’s code is open source. Project page. License: MIT.