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56,681 columns in the coverage ledger · read from /api/field-coverage on citytap-prod · source last observed Oct 11, 2026, 9:04 AM
3,026 datasets, 56,681 catalogued fields, 0 of them still unread. Every band below is a share of that, worst first. Open one to see its datasets.
Find the maps and boundaries other datasets build on.
Gaps in the data behind this page
Source last observed Oct 11, 2026, 8:01 AM.
62 of the 144 datasets in this topic hold no queryable rows.
62 / 144
Source: /api/scorecard
Check it yourself: /api/scorecard?domain=geo-base-layers#/datasets_not_queryable
These pages state their own gaps: /datasets, /freshness, /scorecard, /scorecard/fields, /analyses, /ontology, /graph, /alerts, any topic page under /domains, any dataset page.
Showing 3 of 3 datasets
This dataset contains information on antibody testing for COVID-19: the number of people who received a test, the number of people with positive results, the percentage of people tested who tested pos…