Gaps — what is missing, counted
An honest hole beats a plausible guess. Every exclusion below is a rule, not an accident.
1577
artists found in seed pool
77
trimmed by the 1,500 cap
9
stale MusicBrainz IDs (404)
1162
artists with no venue-linked event
328
artists with ≥ 1 venue-linked event
2335
total edges
1972
edges drawable on the map
The big one: MusicBrainz event coverage
Only 328 of the seeded artists have a MusicBrainz event linked to a venue — 1162 have none. The Phase 0 probe found the same sparsity venue-side (924 Gilman: 4 events; The Fillmore: 4; Great American Music Hall: 22). This map can only draw what a source states; the venue layer will thicken only as MusicBrainz event coverage grows.
Edges by decade (2335 dated, 0 undated)
| decade | edges |
|---|---|
| 1920s | 1 |
| 1950s | 3 |
| 1960s | 73 |
| 1970s | 62 |
| 1980s | 82 |
| 1990s | 150 |
| 2000s | 334 |
| 2010s | 835 |
| 2020s | 795 |
Venues that cannot be drawn (225)
These venues appear in event records but carry no coordinates in MusicBrainz and no Wikidata backlink with coordinates. They are listed, linked, and excluded from the map — never guessed.
Artists whose origin could not be resolved (0)
None — every included artist has origin coordinates (the seed rule requires them).
Other counted holes
- 110 of 2224 events have no venue relationship at all (no edge possible).
- 0 of 2224 events carry no date (drawn, listed as “no date”).
- 1 artists have an uncertain origin (multiple candidate places in Wikidata; the numerically smallest QID is used and labeled).
- 51 of 1197 artists where both sources state an origin have Wikidata and MusicBrainz disagreeing by more than ~0.5°; both values are shown on the artist page, unmerged.
- Seed trim rule (77 artists): bands (P740) kept first, then people (P19) by ascending
QID — deterministic, recorded in
BLOCKED.md.