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Coverage

20,438 of 56,681 columns decided — 36.1% · 4,487 bound (7.9%) · 36,243 still unread

Bound: 4,487; 7.9%; a concept was found and asserted for the column.
Refused: 10,870; 19.2%; the column was read and no concept fits. A verdict, not a gap.
Insufficient: 5,081; 9.0%; read, but the evidence did not settle it.
Unanalysed: 36,243; 63.9%; nobody has read this column yet.

56,681 columns in the coverage ledger · read from /api/field-coverage on citytap-prod · source last observed Oct 10, 2026, 10:53 AM

Where the unread columns are

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.

Gaps in the data behind this page

36,243 of the 56,681 columns in the coverage ledger have never been analysed.
603 of the 3,026 datasets in the catalog list no columns at all.

Source last observed Oct 10, 2026, 10:53 AM.

Where each note comes from

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.

What we have understood

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.

← Citywide scorecard

Datasets by how much of them we have read

Filtered to datasets carrying bbl. Clear

Datasets with the most fields left to read

Showing 1–50 of 193
Dataset	Fields	Decided	Understood	Nobody looked	Shared terms
2018 DOE High School Directory vw9i-7mzq	462	137 30%	7	325	5	See every field
2018 DOE Middle School Directory 6kcb-9g8d	251	8 3%	4	243	4	See every field
2019 DOE High School Directory uq7m-95z8	462	344 74%	26	118	5	See every field
DOE High School Directory 2013-2014 u553-m549	82	16 20%	7	66	7	See every field
NYC Free Tax Prep Sites 5kqf-fg3n	77	14 18%	5	63	3	See every field
2016 DOE High School Directory 7crd-d9xh	67	8 12%	5	59	5	See every field
DOF: Cooperative Comparable Rental Income – Staten Island – FY 2011/2012 2zbg-i8fx	69	11 16%	4	58	4	See every field
DOF: Cooperative Comparable Rental Income – Brooklyn – FY 2011/2012 irhv-jqz7	69	11 16%	3	58	3	See every field
2014 - 2015 DOE High School Directory n3p6-zve2	69	14 20%	5	55	5	See every field
Energy Usage From DOE Buildings mq6n-s45c	62	8 13%	5	54	5	See every field
2017 DOE High School Directory s3k6-pzi2	462	412 89%	29	50	5	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
Bikes in Buildings Requests scjj-6yaf	54	6 11%	5	48	5	See every field
Citywide Public Computer Centers sejx-2gn3	61	15 25%	9	46	6	See every field
Department for the Aging (NYC Aging) - Senior Center Local Law 140 Provider Data - FY 2020 ygfr-ij6t	49	9 18%	5	40	5	See every field
2020 DOE Middle School Directory fdpt-nzk4	464	425 92%	10	39	6	See every field
DOF: Condominium Comparable Rental Income –Staten Island – FY 2009/2010 wv4q-e75v	46	7 15%	5	39	5	See every field
DOF: Condominium Comparable Rental Income – Staten Island – FY 2008/2009 cyfw-hfqk	46	11 24%	5	35	5	See every field
DOF: Condominium Comparable Rental Income – Bronx – FY 2008/2009 en2c-j6tw	46	11 24%	5	35	5	See every field
DOF: Condominium Comparable Rental Income – Queens – FY 2008/2009 m59i-mqex	46	11 24%	5	35	5	See every field
DOF: Condominium Comparable Rental Income – Brooklyn – FY 2008/2009 rmv8-86p4	46	11 24%	4	35	4	See every field
DOF: Cooperative Comparable Rental Income – Staten Island – FY 2010/2011 b37b-brfu	45	10 22%	4	35	4	See every field
DOF: Cooperative Comparable Rental Income – Queens – FY 2008/2009 cwg5-cqkm	45	10 22%	4	35	4	See every field
DOF: Cooperative Comparable Rental Income – Brooklyn – FY 2010/2011 f42p-xqaa	45	10 22%	3	35	3	See every field
DOF: Cooperative Comparable Rental Income – Bronx – FY 2008/2009 gahm-hu5h	45	10 22%	4	35	4	See every field
DOF: Cooperative Comparable Rental Income – Manhattan– FY 2010/2011 jxyc-rxiv	45	10 22%	3	35	3	See every field
DOF: Cooperative Comparable Rental Income – Manhattan– FY 2009/2010 niy5-4j7q	45	10 22%	3	35	3	See every field
DOF: Cooperative Comparable Rental Income – Bronx – FY 2010/2011 qbce-2kcu	45	10 22%	4	35	4	See every field
DOF: Cooperative Comparable Rental Income – Queens – FY 2010/2011 r4s5-tb2g	45	10 22%	4	35	4	See every field
DOF: Cooperative Comparable Rental Income – Brooklyn – FY 2009/2010 tyfh-9h2y	45	10 22%	3	35	3	See every field
DOF: Cooperative Comparable Rental Income – Queens – FY 2009/2010 ykx2-pdw8	45	10 22%	4	35	4	See every field
NYC Clean Heat Dataset (Historical) 8isn-pgv3	42	8 19%	4	34	4	See every field
BIC Complaints Inquiries p2d7-vcsb	42	8 19%	3	34	3	See every field
Local Law 44 Disqualified List 9s68-zggy	42	10 24%	8	32	6	See every field
ACS Community Partners 9hyh-zkx9	39	7 18%	4	32	4	See every field
Affordable Housing Production by Building hg8x-zxpr	41	12 29%	10	29	6	See every field
2020 DOE High School Directory 23z9-6uk9	420	393 94%	40	27	6	See every field
Department for the Aging (NYC Aging) - All Contracted Providers cqc8-am9x	38	11 29%	4	27	4	See every field
Department for the Aging (NYC Aging) - Social Adult Day Care Services 32cj-z7va	33	6 18%	5	27	5	See every field
2021 DOE High School Directory 8b6c-7uty	448	423 94%	43	25	6	See every field
DOF: Condominium Comparable Rental Income – Bronx – FY 2011/2012 3qfc-4tta	70	45 64%	15	25	5	See every field
2010 - 2016 School Safety Report qybk-bjjc	34	9 26%	5	25	4	See every field
BIC Issued Violations upii-frjc	31	6 19%	3	25	3	See every field
DOF: Condominium Comparable Rental Income – Manhattan – FY 2011/2012 dvzp-h4k9	70	46 66%	14	24	4	See every field
DOF: Condominium Comparable Rental Income – Queens – FY 2011/2012 jcih-dj9q	70	46 66%	15	24	5	See every field
DOF: Condominium Comparable Rental Income – Staten Island – FY 2011/2012 tkdy-59zg	70	46 66%	15	24	5	See every field
2016 - 2017 School Safety Report rear-wh5i	38	14 37%	5	24	5	See every field
Privately Owned Public Spaces (POPS) rvih-nhyn	39	16 41%	8	23	5	See every field
Mayor’s Office to End Domestic and Gender-Based Violence Resource Directory 5ziv-wcy4	35	12 34%	7	23	5	See every field

The web of datasets and fields

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.

No field list yet: We hold no columns for these at all.
Nothing read yet: We hold their columns and have decided none of them.
Under half read: Fewer than half their fields carry a verdict.
Half read: At least half their fields carry a verdict.
Most read: At least three quarters of their fields carry a verdict.
Every field decided: Every field carries a verdict — which does not mean every field is understood.

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.