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56,681 columns in the coverage ledger · read from /api/field-coverage on citytap-prod · source last observed Oct 10, 2026, 10:53 AM
3,026 datasets, 56,681 catalogued fields, 36,243 of them still unread. Every band below is a share of that, worst first. Open one to see its datasets.
Freshness above is about the data being current. This is about the data being understood: how many of the catalogue's fields carry a meaning we can act on, which datasets are still waiting, and how far the joinable web reaches.
Filtered to datasets carrying school_district. Clear
| Dataset | Fields | Decided | Understood | Nobody looked | Shared terms | |
|---|---|---|---|---|---|---|
| 2018 Pre-K School Directory xck4-5xd5 | 85 | 12 14% | 7 | 73 | 5 | See every field |
| Primary Land Use Tax Lot Output (PLUTO) 64uk-42ks | 108 | 38 35% | 20 | 70 | 5 | See every field |
| DOE High School Directory 2013-2014 u553-m549 | 82 | 16 20% | 7 | 66 | 7 | See every field |
| Suitability of City-Owned and Leased Property for Urban Agriculture (LL 48 of 2011) 4e2n-s75z | 75 | 26 35% | 18 | 49 | 7 | See every field |
| Housing Database Project Level Files br6q-ssj3 | 68 | 19 28% | 11 | 49 | 6 | See every field |
| 2020 DOE Middle School Directory fdpt-nzk4 | 464 | 425 92% | 10 | 39 | 6 | See every field |
| Atomic Polygons wgbs-damt | 30 | 4 13% | 3 | 26 | 3 | See every field |
| Class Size Report Detail Summary (2010-2015) nbpb-zygj | 18 | 3 17% | 3 | 15 | 2 | See every field |
| 2009 - 2010 Class Size - School-level Detail d3ge-anaz | 16 | 2 13% | 2 | 14 | 2 | See every field |
| 2019 DOE Middle School Directory uqxv-h2se | 251 | 239 95% | 10 | 12 | 6 | See every field |
| Capacity Supporting Transportable Classroom Units (TCU) Removals 32rn-zwi7 | 25 | 14 56% | 11 | 11 | 8 | See every field |
| 2013-2015 School Closure Discharge Reporting r773-ytwa | 15 | 5 33% | 5 | 10 | 2 | See every field |
| Bronx Borough President Capital Funding mdgu-ar69 | 20 | 11 55% | 11 1 matched by name, unread | 9 | 7 | See every field |
| 2020 Fall Admission LL1486 5f9p-h9ar | 10 | 1 10% | 1 | 9 | 1 | See every field |
| 2018-2019 Students, Applications, Admissions & Offers LL72 evir-bydt | 10 | 1 10% | 1 | 9 | 1 | See every field |
| 2021 Fall Admission LL1486 naa7-pasa | 10 | 1 10% | 1 | 9 | 1 | See every field |
| 2019 Fall Admissions LL1486 xt7f-mv4x | 10 | 1 10% | 1 | 9 | 1 | See every field |
| Early Learn Project Sites vmfm-wic2 | 24 | 16 67% | 11 | 8 | 8 | See every field |
| Average Class Size 2017-2019 (Preliminary) cfuy-6eha | 16 | 8 50% | 6 | 8 | 1 | See every field |
| School Bus Route Reporting April2020_21_996 - July 1, - December 31, 2019 s6qk-qkvb | 9 | 1 11% | 1 | 8 | 1 | See every field |
| Class Size Report Distribution Summary (2010-2015) 9ksk-35jf | 12 | 5 42% | 4 | 7 | 2 | See every field |
| 2015-2018 School Closure Discharge Reporting abh8-frsx | 11 | 4 36% | 4 | 7 | 2 | See every field |
| SY2021 Local Law 60 Annual Report ix3t-6s7r | 10 | 3 30% | 3 | 7 | 3 | See every field |
| SY2017-2018 Local Law 60 Annual Report urz8-dybm | 10 | 3 30% | 3 | 7 | 3 | See every field |
| 2016 - 2017 Local Law 60 Bathroom& Non- Instructional Space wrvm-32h2 | 10 | 3 30% | 3 | 7 | 3 | See every field |
| Students Receiving Recommended Special Education Programs by Program Type 6thv-9wgt | 8 | 1 13% | 1 | 7 | 1 | See every field |
| 2018-2019 Career and Technical Education Report Law 174 8vqd-3345 | 8 | 1 13% | 1 | 7 | 1 | See every field |
| 2019 Fall Admission LL1486 Part II 9b3x-yz6y | 5 | 1 20% | 1 | 4 | 1 | See every field |
| Fall 2020 Admissions Report LL1486-A Part II w99a-xtai | 5 | 1 20% | 1 | 4 | 1 | See every field |
| Projected Public School Ratio n7ta-pz8k | 6 | 3 50% | 1 | 3 | 1 | See every field |
| School Districts 8ugf-3d8u | 4 | 2 50% | 1 | 2 | 1 | See every field |
A line means a dataset carries a field tagged with a shared vocabulary term. Two datasets on the same term speak the same language about it, which is what makes a cross-dataset question possible. Sharing a term is not the same as a working join — the dataset page says whether a specific pair compiles.
Bipartite. A dimension node is a conformed-dimension family; a dataset node is a catalog dataset; an edge means that dataset carries at least one column tagged with that dimension, and names the columns that carry it.
How many of an edge's tagging columns carry a method that actually read something. Zero means the edge rests entirely on carried lexical tags.
Two datasets on the same dimension node share a vocabulary, which is weaker than a join. GET /api/datasets/{fourFour}/bindings/{partner} decides whether a specific pair compiles; executing it additionally needs both marts present.
Gaps in the data behind this page
Source last observed Oct 10, 2026, 10:53 AM.
36,243 of the 56,681 columns in the coverage ledger have never been analysed.
36,243 / 56,681
Source: /api/field-coverage
Check it yourself: /api/field-coverage#/coverage/unanalysed
603 of the 3,026 datasets in the catalog list no columns at all.
603 / 3,026
Source: /api/field-coverage
Check it yourself: /api/field-coverage#/catalog/datasets_no_inventory
These pages state their own gaps: /datasets, /freshness, /scorecard, /scorecard/fields, /analyses, /ontology, /graph, /alerts, any topic page under /domains.