Expanded the reviewed United States family editions and their source-date coverage while retaining the 2020 Census Admin 0-5 spine.

Family editions: Pinned 36 reviewed source releases across county subdivisions, places, postal and urban areas, Indigenous lands, electoral and school districts, statistical areas, EPA ecoregions, USFS lands, USGS watersheds, and NWS public and fire-weather zones. The Full graph selects 34 family packages plus the separate Admin 2 history set.
Newer source years: Added the corrected 2023 Indigenous cartographic edition; 2025 Census, district, place, statistical, and weather-zone editions; and reviewed 2026 successors for Indigenous, electoral, school, USFS, watershed, and weather-zone families. These are publisher editions and reviewed source windows, not a claim that every polygon changed in those years.
Historical Admin 2: Carried forward 18 separately evidenced county-history rows. All 18 starts remain unknown; nine have verified ends and nine are observation-only. They do not create a continuous annual Admin 0-5 series.
Country history: Published the 1.3.5 source-edition timeline with the families and year limitations visible in the Country History tab and the Full package.

Full and downloads: Bound the selected family editions and historical Admin 2 routes to the release-owned reference graph, Display, and Lite/Display/Detail downloads. Exact shapes and source-specific date evidence remain available in Full.

The Admin 0-5 spine remains anchored to one 2020 Census edition. Its later polygon-by-polygon continuity has not been verified.

Normalized geometry source and material ownership without changing admitted coverage.

source_material_identity: Added source-addressable family-bank and crosswalk lineage, licence policy, and material IDs.
version_owned_paths: Replaced prior version-owned Full, Display, and reference-partition paths with release-scoped successors while retaining admitted coverage.

Optimized family and crosswalk storage without changing geographic content.

physical layout: Repacked admitted family and crosswalk Parquets into bounded query-optimized row groups; identities, relationships, and geometry are unchanged.

Current-system baseline reconstructed from admitted release evidence.

release: Established the first unified release manifest without changing geometry bytes.

Added the expanded United States family collection.

Integrated reviewed Census, postal, place, Indigenous, weather, watershed, ecological, and other sidechain families without changing the canonical Census Admin0-5 spine.

Established a reconstructed historical baseline from retained source evidence.

Unified the United States country release and public sidechain aliases.

Closed the Admin spine and reviewed country families into the shared Full/Display/download workflow.

Organized canonical identifiers, licenses, aliases, and crosswalks.

Moved Census administrative identities and crosswalk relationships into the shared canonical country-graph contract.

First United States administrative spine release.

Published the Census 2020 Admin0-5 spine: 1 country, 56 Admin1, 3,234 Admin2, 85,528 Admin3, 242,747 Admin4, and 8,180,866 Admin5 records.
Organized shallow Admin0-3 geometry nationally and deeper tract, block-group, and block levels by state or territory.