Methodology that institutional buyers can cite.

Seven-factor 0-100 readiness score for 25 US markets. Six binary indicators plus a graduated regulatory posture, with published weights and source attribution per factor.

Facility-level screening: five questions (FAA registration, airspace clearance, state enforcement, NFPA 418, eVTOL-viability), version-locked and hash-anchored. Documents the Obstruction Environment Score and the canonical cohort taxonomy as scoped components.

Canonical identifier system across 16 namespaces (helipads, vertiports, operators, bills, sites, predictions). Free identifiers; paid data history and API access. FIGI/CUSIP analog for vertical flight.

External, third-party timestamping over six immutable audit tables. Every public record is independently verifiable — no trust in AirIndex required.

Eight emergency-relevant facility attributes (fire suppression, medical proximity, bird mitigation, ground power, secure perimeter, weather infra, battery isolation, NFPA 418). Schema reserved; population is buyer-signal-gated.

Four-tier framework (Functional Oversight / Light Touch / Severe Friction / Recognition Gap) placing 28 US states based on documented vertical flight infrastructure regulation. Anchors plus provisional placements.

Operator-neutral observation layer for AAM community impact across four categories — noise, sentiment, economic, aviation safety. Public-source-only, AIX-ID-anchored, methodology-hashed. NTSB Aviation Accident Database wired as the canonical C4 source; Google News RSS at facility + city granularity for C1/C2.