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Coverage

46,873 of 56,681 columns decided — 82.7% · 9,148 bound (16.1%) · 9,808 still unread

Bound: 9,148; 16.1%; a concept was found and asserted for the column.
Refused: 29,070; 51.3%; the column was read and no concept fits. A verdict, not a gap.
Insufficient: 8,655; 15.3%; read, but the evidence did not settle it.
Unanalysed: 9,808; 17.3%; 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, 4:49 PM

3,026 datasets, 56,681 catalogued fields, 9,808 of them still unread. Every band below is a share of that, worst first. Open one to see its datasets.

Election District Poll Sites

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Fields catalogued

Understood

Checked, no match

Nobody has looked

Every field decided — Every field carries a verdict — which does not mean every field is understood.

Every field in this dataset

Covered and uncovered alike, in the order the publisher lists them. A field with no verdict is one nobody has looked at yet.

Field	Type	What we know	Meaning	How it was decided	Shared term
borough BOROUGH	Text	Understood	place.borough Borough	value_domain_read	borough
ed ED	Number	Checked, no match	—	value_domain_read card=65 nonnull=5901 null=0 smallest=23 largest=87 sum=332189 average=56.29367903745128	—
site_number SITE_NUMBER	Text	Checked, no match	—	value_domain_read smallest=00BOE001M largest=99HRA001K	—
ad AD	Number	Checked, no match	—	value_domain_read card=65 nonnull=5901 null=0 smallest=23 largest=87 sum=332189 average=56.29367903745128	—