SEAD Exports

SEAD exports provide Nordic environmental-archaeology site context. Their current strength is inventory and spatial framing. Their current limitation is equally important: the checked-in capture does not contain the linked temporal and bibliographic evidence required for chronological comparison.

Current Governed Surface

The temporal and legibility reviews cover 2,195 source inventory rows. The normalized Nordic GeoJSON contains 2,172 mapped features across Sweden, Norway, Finland, and Denmark. The remaining 23 review rows lack a country assignment and are not members of the normalized Nordic point layer.

Evidence dimension	Current review result
numeric interval rows	0
dating-range rows	0
relative-period rows	0
bibliography rows	0
site-inventory-only rows	2,195
mapped Nordic context features	2,172

Every reviewed row currently has site_page_only access visibility, duration_not_available posture, and unresolved temporal comparability. The layer is therefore useful context, but it is not a temporally aligned archaeology event surface.

Governed Artifacts

Artifact	Responsibility
data/sead/normalized/nordic_environmental_sites.geojson	the 2,172 mapped Nordic context features and their stable SEAD identities
data/sead/review/temporal_review.json	machine-readable temporal classification, evidence posture, and denominators
data/sead/review/temporal_review.csv	row-level review exchange surface
data/sead/review/temporal_review.md	reader-facing explanation of the same governed review

The data/sead/normalized/ tree is the family authority for repository-owned representation, while data/sead/review/ owns its temporal, access, and legibility findings. Regional report copies are selected descendants. They cannot fill the current chronology and bibliography gaps or change an inventory row into an archaeological event.

flowchart LR
    Inventory["2,195 captured site rows"] --> Review["inventory and legibility review"]
    Review --> Mapped["2,172 Nordic point features"]
    Review --> Unassigned["23 rows without country assignment"]
    Mapped --> Context["environmental archaeology context"]
    Review --> TimeGap["0 dating, period, or bibliography rows"]
    TimeGap --> Refusal["numeric temporal comparison refused"]

Read A SEAD Feature

The normalized feature preserves the SEAD site identifier, name, country, coordinates, source page URL, context role, access limits, and explicit unresolved temporal semantics. The site page is the upstream inspection anchor when the repository view is too thin for a stronger claim.

The current export does not establish:

• a numeric age or duration;
• a relative-period assignment;
• source bibliography for the site's archaeological interpretation;
• equivalence between site inventory density and past activity; or
• contemporaneity with nearby pollen or aDNA evidence.

Missing temporal values mean not captured under the current contract, not zero, undated in the upstream database, or absent from archaeology.

Two Rows, Two Publication Outcomes

The inventory and mapped populations can be inspected through concrete rows:

SEAD row	Captured state	Publication outcome
6468, 10412 Fjälkinge	point at 14.28308648, 56.0388744, country Sweden, stable upstream page	admitted to the Nordic context layer with unresolved time
3719, Grobin	stable site identity and upstream page, blank country assignment	retained in review but absent from the four-country mapped layer

Fjälkinge demonstrates qualified admission: the point and source identity are usable for spatial context, while time_start_bp, time_end_bp, and duration remain null. Grobin demonstrates retained non-membership: source evidence exists, but the current publication geography does not admit it.

flowchart LR
    Inventory["captured SEAD row"] --> Identity["site ID and upstream page"]
    Identity --> Geography{"four-country membership?"}
    Geography -->|6468 Fjälkinge| Point["mapped spatial context"]
    Geography -->|3719 Grobin| Review["retained non-member"]
    Point --> Time["numeric time refused"]
    Review --> Time

Neither outcome is a negative archaeological conclusion. One is a spatially qualified publication member; the other is a captured record outside the current geographic product. Both retain an unresolved temporal posture.

Reuse Contract

Carry the site identifier, source URL, point geometry, country assignment, access posture, context-only evidence role, and unresolved temporal-semantics object. Use 2,195 as the reviewed inventory denominator and 2,172 as the mapped Nordic-feature denominator; do not interchange them or silently discard the 23 unassigned records from a completeness statement.

Continue to SEAD source guidance for access and capture limits, maps for context-layer interpretation, and publication limits for refused comparisons.