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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

Datasets with the most fields left to read

Showing 1–50 of 92
Dataset	Fields	Decided	Understood	Nobody looked	Shared terms
Citywide Mobility Survey - Main Survey 2017 dd6w-hnq9	454	382 84%	5	72	1	See every field
2017 DOE High School Directory s3k6-pzi2	462	412 89%	29	50	5	See every field
2020 DOE Middle School Directory fdpt-nzk4	464	425 92%	10	39	6	See every field
Citywide Mobility Survey - October 2020 3mpc-kqwk	212	177 83%	0	35	0	See every field
Energy and Water Data Disclosure for Local Law 84 2015 (Data for Calendar Year 2014) nbun-wekj	259	228 88%	5	31	2	See every field
Energy and Water Data Disclosure for Local Law 84 2017 (Data for Calendar Year 2016) utpj-74fz	262	232 89%	8	30	2	See every field
2020 DOE High School Directory 23z9-6uk9	420	393 94%	40	27	6	See every field
Energy and Water Data Disclosure for Local Law 84 2016 (Data for Calendar Year 2015) 77q4-nkfh	256	230 90%	7	26	2	See every field
2021 DOE High School Directory 8b6c-7uty	448	423 94%	43	25	6	See every field
Voter Analysis 2008-2018 psx2-aqx3	175	152 87%	44	23	3	See every field
Citywide Mobility Survey - Main Survey 2018 jpcp-ic7c	331	309 93%	16	22	3	See every field
Property Valuation and Assessment Data Tax Classes 1,2,3,4 8y4t-faws	139	118 85%	7	21	1	See every field
DOB NOW: Build Elevator Device Details juyv-2jek	167	151 90%	34	16	0	See every field
Cash Assistance and SNAP Cases Reopenings with a Missed Benefits Cycle 28gm-7ump	75	59 79%	0	16	0	See every field
Cash Assistance and SNAP Cases Closed 5fs5-yi3e	75	59 79%	0	16	0	See every field
Cash Assistance and SNAP Cases Reopenings 5uf6-jjmy	75	59 79%	0	16	0	See every field
Cash Assistance and SNAP Cases Rejections g6pg-qint	75	59 79%	0	16	0	See every field
2021 Arts Data Report 9h53-fsqa	275	261 95%	8	14	0	See every field
NYCgov Poverty Measure Data (2016) tpt8-yikk	61	47 77%	1	14	1	See every field
NYCgov Poverty Measure Data (2013) yhck-bxbs	61	48 79%	1	13	1	See every field
2019 DOE Middle School Directory uqxv-h2se	251	239 95%	10	12	6	See every field
DOF: Cooperative Comparable Rental Income – Bronx – FY 2009/2010 3miu-myq2	45	34 76%	7	11	4	See every field
2019-2020 Arts Survey Data njjd-3gve	442	432 98%	1	10	0	See every field
2019 Volunteers Count Report - Neighborhoods 72r6-mtgs	218	208 95%	5	10	4	See every field
DOF: Condominium comparable rental income – Staten Island - FY 2010/2011 a5qt-5jpu	46	36 78%	9	10	5	See every field
DOF: Cooperative Comparable Rental Income – Manhattan– FY 2008/2009 3btx-p4av	45	35 78%	8	10	4	See every field
DOF: Cooperative Comparable Rental Income – Brooklyn – FY 2008/2009 62mr-ukqs	45	35 78%	8	10	4	See every field
DPR_AthleticFacilities_001 9wwi-sb8x	45	35 78%	3	10	3	See every field
2016 - 2017 Arts Survey data f33j-ecpr	638	629 99%	6	9	0	See every field
Citywide Mobility Survey - Person 2024 i2im-iqtt	249	240 96%	0	9	0	See every field
Citywide Mobility Survey - Household 2022 dt3g-khpi	105	96 91%	2	9	0	See every field
ENDGBV: The Intersection of Domestic Violence, Race/Ethnicity and Sex ge9t-ywzs	55	46 84%	1	9	0	See every field
DOF: Condominium Comparable Rental Income –Manhattan – FY 2008/2009 956m-xy24	46	37 80%	8	9	4	See every field
2013-2014 DOE High School Programs i9pf-sj7c	102	94 92%	2	8	0	See every field
Citywide Mobility Survey - Household 2024 5mb3-padx	97	89 92%	0	8	0	See every field
DOB Sign Application Filings nyis-y4yr	72	64 89%	13	8	1	See every field
Citywide Mobility Survey - July 2020 ijzq-5wy8	194	187 96%	0	7	0	See every field
DOF: Condominium comparable rental income – Brooklyn - FY 2010/2011 5mw2-hzqx	46	39 85%	8	7	4	See every field
DOF: Condominium Comparable Rental Income – Manhattan – FY 2009/2010 ad4c-mphb	46	39 85%	8	7	4	See every field
DOF: Condominium comparable rental income – Bronx - FY 2010/2011 bawj-6bgn	46	39 85%	9	7	5	See every field
DOF: Condominium Comparable Rental Income – Queens – FY 2009/2010 crbs-vur7	46	39 85%	9	7	5	See every field
DOF: Condominium comparable rental income – Manhattan - FY 2010/2011 ikqj-pyhc	46	39 85%	8	7	4	See every field
DOF: Condominium Comparable Rental Income – Bronx – FY 2009/2010 n2s5-fumm	46	39 85%	9	7	5	See every field
2021 DOE Middle School Directory f6s7-vytj	327	321 98%	24	6	5	See every field
DOB NOW: Electrical Permit Details xmmq-y7za	40	34 85%	1	6	0	See every field
GreenThumb Site Visits xqbk-beh5	35	29 83%	0	6	0	See every field
2015-2016 Arts Survey Data c4vk-jvzy	390	385 99%	3	5	0	See every field
ENDGBV: Family Justice Centers: Supporting Our Foreign Born Clients Report wr2n-ag8h	98	93 95%	0	5	0	See every field
New York City Automated External Defibrillator (AED) Inventory 2er2-jqsx	23	18 78%	8	5	3	See every field
Queens Library Branches kh3d-xhq7	21	16 76%	10	5	7	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.