This page lists changes made to Civic Data Atlas, including new features, new data, and corrections. Corrections stay in the record rather than being edited away. Sign up for occasional update notices at our email newsletter.
Last update October 26, 2026
The tree canopy and land cover tables now say their land cover comes from 2021–2023 aerial imagery. Before, the source line and the period note gave only 2026, which is the year the National Baseline Assessment was published, not the year the photos were taken.
Council member information for Chicago, New York and Los Angeles was checked against each city's official roster, and the district profiles used to carry some outdated details. Office addresses, phone numbers, website links, portraits and committee memberships have been updated to match. Sources are each city's official council or clerk roster, checked October 15, 2026.
How Workers Commute used to list six commute modes (drove alone, carpooled, public transit, walked, biked, other) as shares of workers who commute to a workplace, with Worked From Home added at the bottom as a share of all workers. Because the two used different bases, the rows did not add up to 100%. The table now shows Worked From Home and Commuted to Work as the two main rows, with each commute mode listed beneath Commuted to Work. Every row is a share of all workers, and a "Sub-rows show" control switches the modes back to a share of commuters. Mode percentages are lower than before because they are now out of all workers, and Other Commute Mode now includes taxicab and motorcycle trips. Change over time, the comparison pages and the heatmap follow the same structure. Source: American Community Survey 2010–2014, 2015–2019 and 2020–2024.
A new page lists news coverage that has used Civic Data Atlas data, with what each article cited and a link to the page it drew on.
The "Compare across" links on profile cards had disappeared from most ward and neighborhood pages. They are back. Analysis articles also now have their own preview images when shared.
Choosing a table from a topic's list on a profile or comparison page sometimes stopped partway down the page and needed a second click.
Tables where a page lets you choose what the sub-rows are a share of, such as all residents or foreign-born residents, now carry both versions in the Excel download. The existing Data sheet is unchanged. A new Data (alt. denominator) sheet shows the same table on the other basis, with its own margins of error and ranks, and the Change over time sheet gains a Denominator column. Counts are the same on both.
When Year of U.S. Entry was switched to show each period as a share of foreign-born residents, the citywide column divided the city's counts by the district's foreign-born total and showed values above 800 percent. It now uses the citywide foreign-born total. The default view did not change.
Citywide counts for each way of getting to work were calculated on all workers, including people who work from home, so they read about a quarter too high next to ward, district and neighborhood counts. They now use workers who commute, the same as every other area. Percentages did not change.
Age tables now include each area's median age, and commuting tables include the share of workers who work from home. Housing tables break out building size in more detail.
On the "Where Residents Work" and "Where Workers Live" tables, Rank now compares an area's share with every other ward, district or neighborhood for the same place. Before, ranks were erroneously repeating the order of the rows. Neighborhood pages now show the citywide value and difference for these tables, as ward and district pages already did.
This changelog begins October 1, 2026. Earlier changes are not listed here.