Skip to content

SEAD Exports

SEAD exports turn a relational environmental-archaeology source into five different products: an auditable capture, a site-inventory layer, a record-level temporal-evidence layer, a governed Sweden discovery surface, and review packets that explain which comparisons are allowed. Choose the product that matches the question rather than treating one GeoJSON as the whole database.

Snapshot At A Glance

The current governed full-evidence run is sead-full-evidence-39bfff6a-ce80714e (sha256:ce80714e4c9e9974b24913e5da50f49854670ed642879c1ca5076499e1d56725). Its denominators are:

Governed population Count Interpretation
source tables 61 complete captured relational table set
sites in the Nordic bounding-box review 2,195 country-decision denominator
assigned four-country sites 2,069 SE 1,925, DK 59, NO 45, FI 40
sites requiring country review 103 retained outside assigned publication membership
unassigned sites 23 retained without a governed country assignment
atlas SEAD features 11,796 2,069 four-country site features plus 9,727 Swedish chronology-discovery features; not a distinct-site count
chronology claims 25,109 14,264 comparable, 10,144 context-only, 60 refused by the numeric BP contract, 641 unresolved
source-native observations 177,763 quantitative observation denominator
source-native taxon relations 1,974 preserved source taxonomy, not accepted cross-source classification
dimension relations 2,639 explicit source-native measurement dimensions
eligible / refused propagation events 0 / 177,763 refused: source_classification_not_accepted

Site, feature, claim, observation, relation, and event counts are different units. The atlas may display SEAD chronology and source-native detail, but it must not turn the refused event population into migration or propagation evidence.

Choose An Artifact

Need Use Why
audit acquisition and joins data/sead/raw/nordic_sites.json preserves source rows, relation inventories, counts, and site-linked material
display or spatial analysis data/sead/normalized/nordic_environmental_sites.geojson provides admitted point geometry, popup evidence, and normalized temporal fields
tabular exchange data/sead/normalized/nordic_environmental_sites.csv represents the same normalized point population with serialized temporal semantics
navigate chronology through time data/sead/normalized/nordic_temporal_evidence.geojson provides interval-preserving features for every mapped linked chronology group
exchange record-level chronology data/sead/normalized/nordic_temporal_evidence.csv provides the same grouped temporal population in tabular form
discover and prioritize Swedish sites data/sead/derived/sweden_archaeology_site_discovery.json preserves all 1,925 assigned Swedish sites, a transparent evidence-readiness order, and the ranking contract
navigate Swedish discovery through time data/sead/derived/sweden_archaeology_site_discovery.geojson carries 8,172 exact linked intervals and 1,555 explicitly unresolved site features
exchange the one-row-per-site discovery registry data/sead/derived/sweden_archaeology_site_discovery.csv keeps chronology, bibliography, dataset, RAÄ-context, and activity-status fields together
decide site-level temporal eligibility data/sead/review/temporal_review.json classifies each captured site as numeric-plus-context or unresolved
inspect access limits data/sead/review/access_model.json distinguishes mirrored material from upstream browsing and references
assess interpretability data/sead/review/evidence_legibility_review.json records capture depth, risk, and publication posture
plan stronger evidence recovery data/sead/review/recovery_requirements.json links gaps to required evidence and satisfaction signals

CSV and Markdown companions are review and exchange views of the same governed packets. They do not define a second scientific truth.

flowchart LR
    API["SEAD relational API"] --> Raw["raw capture"]
    Raw --> Sites["normalized site inventory"]
    Raw --> Chronology["normalized temporal evidence"]
    Raw --> Review["temporal, access, and legibility review"]
    Sites --> Atlas["optional spatial-discovery layer"]
    Chronology --> Atlas["default time-navigation layer"]
    Review --> Atlas
    Review --> Decision["allowed and refused comparisons"]

Read The Normalized Temporal Fields

For a numeric feature in either normalized product:

  • time_start_bp and time_end_bp define the grouped chronology interval or, in the site inventory, the derived site envelope;
  • time_mean_bp is a display and indexing aid, not a replacement for the interval;
  • time_label presents the interval to readers; and
  • temporal_semantics records evidence class, precision, comparison posture, original labels, normalized labels, uncertainty, and provenance locator.

Every temporal-evidence feature has numeric bounds. Unresolved site-inventory features keep null numeric fields. Do not coerce null to zero, manufacture a midpoint, or map a broad label to numeric bounds without a governed source rule.

Atlas Behavior

The Nordic Atlas publishes the governed Sweden discovery layer rather than loading the two normalized SEAD layers beside it:

Atlas state Numeric discovery features Unresolved discovery features
full temporal extent all 8,172 linked interval features shown all 1,555 unresolved Swedish sites shown
narrowed BP window shown only on record-interval overlap withheld because overlap is unknown

This makes the full view useful for spatial exploration while keeping a narrowed view scientifically honest. A withheld unresolved point is not a negative finding about the selected period.

Follow Two Concrete Rows

Agerod V (4237)

The capture follows Agerod V through its linked sample and analysis inventory. The site layer publishes the overall 7000–10000 BP envelope. The temporal layer publishes its grouped chronology intervals and source-record IDs. Use the second product for timeline overlap and the first for total site coverage.

Borgholm (3776)

The capture retains the source label Quaternary, but no eligible numeric site interval. The site-inventory feature remains valuable for spatial discovery. It does not appear in the temporal-evidence layer because the repository has not invented a BP conversion for the label.

flowchart TD
    Feature["normalized SEAD feature"] --> Bounds{"numeric BP bounds?"}
    Bounds -->|yes| Overlap["test interval overlap"]
    Bounds -->|no| Full{"full temporal extent?"}
    Full -->|yes| Context["show as spatial context"]
    Full -->|no| Withhold["withhold: temporal eligibility unknown"]

Geographic Membership

One hundred twenty-six bounding-box review rows are not assigned members of the four-country point layer: 103 require country review and 23 remain unassigned. They retain their identities and coordinates in the raw and review surfaces. Their absence from GeoJSON does not mean that the source row was invalid, deduplicated, or deleted.

Use 2,195 as the country-decision denominator and 2,069 as the assigned-site denominator. Whenever temporal evidence coverage is discussed, use 25,109 as the claim denominator, partitioned into 14,264 comparable, 10,144 context-only, 60 explicitly refused, and 641 unresolved claims. For Swedish discovery, report 8,172 numeric features and 1,555 unresolved-site features across 1,925 assigned sites.

Reuse Checklist

Before publishing a SEAD-derived result, verify that it retains:

  • the site identifier and source URL;
  • capture and mapped denominators relevant to the claim;
  • coordinate and country-membership basis;
  • temporal posture and numeric bounds, if any;
  • the observation unit: chronology interval or site envelope;
  • uncertainty and original period labels;
  • the distance or interval-overlap rule used; and
  • a clear distinction between absence, exclusion, and unknown temporal eligibility.

Continue to SEAD source guidance for the full evidence model, Sweden archaeology site discovery for the readiness and coverage contract, maps for atlas interpretation, and publication limits for refused comparisons.