Implements the third transform: pull features from sibling Admin 0
records into a destination country's Admin 1 view. Used for:
- China + Taiwan/HK/Macau (NE keeps each as separate Admin 0)
- Finland + Åland (missing from FIN admin 1; NE keeps Åland as ALD
admin 0)
Verified on real data:
Building worldview=ukr admin_level=1
territory_assignments: added 4 features from sibling Admin 0 records
(4 = TWN/HKG/MAC + ALD; ARMM-renamed BARMM region picks up correctly
because name_overrides ran first.)
Two bugs fixed along the way:
1. **Property name casing.** NE Admin 0 ships with uppercase property
names (ADM0_A3, NAME_EN), Admin 1 with lowercase. All transforms
downstream assume lowercase, so we now normalize to lowercase at
shapefile-conversion time. Bonus: fixes a silent flying_islands
bug where `adm0_a3` filters never matched at Admin 0 because the
props were uppercase.
2. **drop_outside_bbox at Admin 0.** A country's multi-polygon often
includes overseas territories (Netherlands → Caribbean), so bbox
filtering at Admin 0 would drop entire countries. Now guarded to
only run at Admin 1 where each feature is a single subdivision.
3. **Åland's NE code.** NE uses ALD, not the ISO 3166-1 ALA. Updated
territory_assignments.yaml with comment noting the divergence.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Add mapshaper -simplify as a final-stage pass after the Python
transforms. Two-stage so the transforms operate on full-resolution
geometry (no risk of repositioning ghost features that got simplified
away) but the shipped output is browser-sized.
Default 5% with keep-shapes — preserves recognizable country shapes
while dropping the per-vertex bloat. keep-shapes prevents tiny features
(small island chains) from being collapsed away entirely.
Results on real outputs:
Admin 0: 23.6 MB → 2.1 MB (-91%, 249 features intact)
Admin 1: 67.7 MB → 15 MB (-78%, 4591 features, transforms preserved)
Per-feature simplify factors (the notebook had a size-based ladder)
can be added later if specific countries need tuning. 5% is the
mapshaper-recommended "good enough for web" default.
Open thought for future: split Admin 1 output by country
(`<worldview>_admin1_<adm0_a3>.geo.json`) so the per-chart payload is
~50KB-1MB instead of one 15MB global file. Will pair naturally with
the territory_assignments pass (which is per-country anyway).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Add Admin 1 build path and the second declarative transform. Exercises
the YAML config layer on real data:
Building worldview=ukr admin_level=1
loaded 4596 features
name_overrides: applied 19 field updates across 10 entries
flying_islands: repositioned 12 features, dropped 5 (outside-bbox)
wrote ukr_admin1.geo.json (67,677,079 bytes, 4591 features)
Counts verified against expectations:
- 19 name_overrides = 2 France typos + 6 France ISO codes
+ 5 PHL Caraga renames + 6 PHL BARMM renames
- 12 repositions = 2 USA + 1 NOR + 2 PRT + 2 ESP + 5 FRA
- 5 drops = NLD Caribbean + GBR overseas territories
New: pure-Python translate/scale geometry transform (no shapely dep);
operates on Polygon/MultiPolygon coordinates. Scale pivot is the bbox
center of each matched feature — good enough for the visual layout
purposes we use it for. Output bbox correctness verified by counts.
Refactor: extract `build_one(worldview, admin_level, ...)` so the
target matrix can grow in subsequent commits.
What's stubbed (TODO inline): territory_assignments, composite_maps,
regional_aggregations, simplification, procedural/. Output is
uncompressed and unsimplified (67MB) — simplification will land with
the mapshaper -simplify pass.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
End-to-end working pipeline replacing the legacy notebook for one
worldview / admin level. Verified locally:
$ ./build.sh
Country Map build — pinned to NE v5.1.2 (f1890d9f)
Loaded 10 name override entries
Building worldview=ukr admin_level=0
Downloading NE ne_10m_admin_0_countries_ukr (worldview=ukr)…
mapshaper: ne_10m_admin_0_countries_ukr.shp → _raw_ukr_admin0.geo.json
loaded 249 features
name_overrides: applied 0 field updates across 10 entries
wrote .../output/ukr_admin0.geo.json (23,639,348 bytes)
Done.
What's wired:
- NE download from pinned tag (v5.1.2 / SHA f1890d9f) with cache
- Shapefile → GeoJSON via mapshaper CLI
- YAML config loading (currently just name_overrides)
- name_overrides transform with {match, set} semantics, including
the {in: [...]} list-membership matcher
- Output writes to scripts/output/ (gitignored)
- build.sh wrapper validates Python + Node + PyYAML are available
What's stubbed for future commits (TODO inline):
- Multiple worldviews (currently UA only)
- Admin 1 build (where name_overrides actually fire — currently no
features in Admin 0 match the FRA/PHL admin1 entries)
- flying_islands, territory_assignments, regional_aggregations,
composite_maps transforms
- Simplification (mapshaper -simplify)
- Procedural escape-hatch orchestration
- Manifest with NE SHA + build metadata
The 0 overrides applied is correct, not a bug: all current entries
target Admin 1 features.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
