FMG full-JSON ingest stores burg population in FMG points; burg zoom rules expect absolute people — burgs invisible below zoom 6

[barrulus]

Symptom

For full-JSON-imported worlds, the Burgs layer renders nothing at world zooms. Digia (2,871 burgs) and Jolliariana (19,474) show zero burgs until zoom 6.

Root cause

Two conventions collide:

• fmg-full-json ingest stores FMG's raw population points verbatim (Digia max 239, Jolliariana max 320; p90 = 1 and 6).
• components/maps/questables-style-factory.ts BURG_ZOOM_RULES were calibrated for the legacy import's absolute populations (snoopia max 221,168; 45 burgs ≥ 10k): zoom 2–3 need ≥10,000, zoom 4 ≥1,000, zoom 5 ≥250 → FMG-point worlds render nothing until zoom 6 (threshold 0).

FMG's own convention: displayed population = points × settings.populationRate × settings.urbanization (both present in the Full JSON settings block).

Fix options

1. (Preferred) Scale at ingest: store absolute people (b.population * populationRate * urbanization, rounded) so all downstream consumers (zoom rules, settlemaker inputs, shops/encounters, LLM context) see one convention; backfill existing full-JSON worlds using their stored settings.
2. Or keep points in DB and scale in the style factory — but that leaves every other population consumer reading points.

Audit note: anything already consuming Jolliariana burg populations (settlement generation, narrative context) has been seeing points since 2026-08-09.

Found browser-testing lazy-world-tiles 2026-08-10; pre-existing Plan B ingest behavior, unrelated to that branch.

[barrulus]

Concrete confirmation from world Digia: burg Grug (capital, Bodra) — FMG Edit Burg dialog shows Population 15984; the app tooltip shows Pop. 16. FMG's raw value is ~15.984 points and its UI multiplies by populationRate (1000 here); our ingest stores the rounded points verbatim. Screenshot pair captured 2026-08-10 during lazy-world-tiles browser testing.