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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 742
Dataset	Fields	Nobody looked
Citywide Mobility Survey - Person Survey 2019 6bqn-qdwq	165	165	See every field
Citywide Mobility Survey - Trip Diary 2018 kcey-vehy	118	118	See every field
Citywide Mobility Survey - Trip Diary 2017 mpk5-48av	109	109	See every field
DOF Property Abatement Detail rgyu-ii48	101	101	See every field
Citywide Mobility Survey - Trip 2022 x5mc-2gmi	98	98	See every field
NYC Greenhouse Gas Emissions Inventory wq7q-htne	91	91	See every field
Annual Overweight Load (AOL) Permits ys48-9d3c	88	88	See every field
2012 - 2013 D75 Progress Reports e555-uc5w	83	83	See every field
NYC Mobile Services Study j46y-iqiq	79	79	See every field
2016-2017 Student Discipline Annual Report - AGE 45nu-yrf2	77	77	See every field
Citywide Mobility Survey - Trip Survey 2019 w9dc-u4ik	77	77	See every field
2019 - 2020 School Year Local Law 226 Report for the Demographics of School Staff - Ethnicity 2jg5-6hqv	76	76	See every field
2015 - 2016 Student Discipline Annual Report- AGE r5p4-2qap	76	76	See every field
2017-2018 Student Discipline Annual Report - AGE xgcb-9jsr	73	73	See every field
2018 Diversity Report - Grades K-8 Special Programs 66ry-raij	71	71	See every field
2017 Diversity Report K-8 - Special Programs 7scx-rfrp	71	71	See every field
2015-16 Demographic Data - Grades K-8 Special Programs pgun-i6u7	71	71	See every field
2017 - 2018 Diversity Reports Special Programs K -8 u7tg-8kia	71	71	See every field
2017 Diversity Report K-8 - School 29ry-u5bf	70	70	See every field
2015-2016 Demographic Data - Grades K-8 School 7yc5-fec2	70	70	See every field
2017 -2018 Diversity Report K - 8 School 8fwe-y7ui	70	70	See every field
2018 Diversity Report - Grades K-8 School vc9v-wg6y	70	70	See every field
2017 Diversity Report K-8 - District 5qbe-4vqd	69	69	See every field
2014-2015 Diversity Report - K-8 & Grades 9-12 District, Schools, Special Programs, Diversity Efforts a345-26ab	69	69	See every field
2018 Diversity Report - Grades K-8 District a6bb-tgvr	69	69	See every field
2019-20 School Quality Guide Early Childhood kkng-ugna	69	69	See every field
2015-2016 Diversity Report - K-8 & Grades 9-12 District, Schools, Special Programs, Diversity Efforts, Admissions Methods mqk5-vp9c	69	69	See every field
2015-2016 Demographic Data - Grades K-8 District nk42-j6hc	69	69	See every field
2016-2017 Diversity Report - Pre-Kindergarten, K-8 & Grades 9-12 District, Schools, Special Programs, Diversity Efforts, Admissions Methods qf2u-z2br	69	69	See every field
2017 - 2018 Diversity Report K-8 District uep6-mri2	69	69	See every field
2015 - 2016 Demographic Snapshot wspa-cuqk	69	69	See every field
2018-2019 Diversity Report - Pre-Kindergarten, K-8 & Grades 9-12 District, Schools, Special Programs, Diversity Efforts, Admissions Methods xni9-ncns	69	69	See every field
2016 - 2017 Demographic Snapshot 55yj-h64d	65	65	See every field
2018 Diversity Report - Grades 9-12 School bx2w-sb84	65	65	See every field
2017 -2018 Diversity Report 9 - 12 School hyht-buiu	65	65	See every field
2015-2016 Demographic Data - Grades 9-12 School kivi-tmb3	65	65	See every field
2017 Diversity Report 9-12 - School myrx-addi	65	65	See every field
2018 Diversity Report - Grades 9-12 District 9b8z-mk7h	64	64	See every field
NYC Greenhouse Gas Emissions Municipal Inventory b7aj-ck5a	64	64	See every field
2015-2016 Demographic Data - Grades 9-12 District eg75-mh9k	64	64	See every field
2017 -2018 District Diversity Report 9 - 12 pd6g-yghw	64	64	See every field
2017 Diversity Report 9-12 - District reri-chf8	64	64	See every field
2019-20 School Quality Guide Citywide Distict 75 c38p-gtif	62	62	See every field
Over Dimensional Vehicle Permits (ODVP) as69-ew8f	61	61	See every field
Parks Concessions 53m8-jdtg	59	59	See every field
2017-2018 Student Discipline Annual Report - Grade Level 2ps2-dsjr	57	57	See every field
2016-2017 Student Discipline Annual Report - GRADE LEVEL kg6x-kv5b	57	57	See every field
2015 2016 Student Discipline Annual Report - GRADE LEVEL 29bv-qqsy	56	56	See every field
Asset Management Parks System (AMPS) - Work Orders 8sdw-8vja	55	55	See every field
Citywide Mobility Survey - Household Survey 2019 a5rk-jemi	52	52	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.