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Fabio 1beeaab2db Graph: national county↔district↔legislator authority layer

The first edges in the repo. Every US county now links to the districts it
sits in, weighted by area overlap, and every legislator links to the district
they represent — county → district → representative, traversable.

Data (PostGIS, no Atlas dependency — computed directly from geometry):
- data/county_district_edges.jsonl — 16,328 weighted edges. area_weight =
  ST_Area(ST_Intersection(county, district))/ST_Area(county) over ST_MakeValid
  Census TIGER 2024 geometries, overlaps <0.5% dropped. Uses area-intersection,
  NOT centroid-in-polygon, so urban districts that carve through counties
  (e.g. GA CD-5 / Atlanta across Clayton+DeKalb+Fulton) are captured, not
  silently dropped. Per-county weights sum to ~1.0 per district type.

build.py:
- ~6,896 new district nodes: 435 CD (ACS demographics where available; sparse
  for the 8 states missing from acs_cd) + 4,927 state-house + 1,897 state-senate
  (geometry-only). GEOID/number-keyed, stable.
- county index.md gains a `districts:` block (frontmatter) + a ## Districts
  section (body links, so link-integrity checks them).
- legislators + US House members gain `represents:` pointing at their district
  node; edge stored once on the person, inverse left to the view.
- schemas/jurisdiction: classification enum + chamber/districts fields.

Honest gaps (logged, not hidden): ID + NH have no state-house geometry, so
their house districts get nodes (represents resolves) but no county edges;
CD nodes for acs_cd-missing states are demographically sparse.

Deterministic (byte-identical rebuild); validate.py passes 26,617 records,
link-integrity clean (every district/represents link resolves).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-07-04 22:28:08 -04:00

3.4 KiB

Raw Blame History

type, title, classification, fips, state, demographics, districts, sources, confidence, tags, timestamp

type

title

classification

fips

state

demographics

districts

sources

confidence

tags

timestamp

Jurisdiction

Tuscaloosa County, AL

county

01125

population	population_under_18	population_18_64	population_65_plus	median_household_income	poverty_rate	homeownership_rate	unemployment_rate	median_home_value	gini_index	vacancy_rate	race_white	race_black	race_asian	race_native	hispanic	bachelors_plus
241212	66714	89122	85376	68404	15.62	61.42	6.61	260600	0.4528	11.17	142491	75540	4344	190	14030	73504

to	rel	area_weight
us/states/al/districts/04	in-district	0.6246

to	rel	area_weight
us/states/al/districts/07	in-district	0.3752

to	rel	area_weight
us/states/al/districts/senate/5	in-district	0.4837

to	rel	area_weight
us/states/al/districts/senate/21	in-district	0.3456

to	rel	area_weight
us/states/al/districts/senate/24	in-district	0.1705

to	rel	area_weight
us/states/al/districts/house/16	in-district	0.3765

to	rel	area_weight
us/states/al/districts/house/62	in-district	0.2387

to	rel	area_weight
us/states/al/districts/house/61	in-district	0.165

to	rel	area_weight
us/states/al/districts/house/72	in-district	0.096

to	rel	area_weight
us/states/al/districts/house/71	in-district	0.0856

to	rel	area_weight
us/states/al/districts/house/63	in-district	0.0192

to	rel	area_weight
us/states/al/districts/house/70	in-district	0.0191

field	source
demographics	Census ACS 2023

field	source
districts	PostGIS area-intersection over Census TIGER 2024 boundaries

official

jurisdiction

county

2026-07-03

Tuscaloosa County, AL

County jurisdiction — 2 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	241212
Under 18	66714
18–64	89122
65+	85376
Median household income	68404
Poverty rate	15.62
Homeownership rate	61.42
Unemployment rate	6.61
Median home value	260600
Gini index	0.4528
Vacancy rate	11.17
White	142491
Black	75540
Asian	4344
Native	190
Hispanic/Latino	14030
Bachelor's or higher	73504

Districts

AL-04 — 62% (congressional)
AL-07 — 38% (congressional)
AL Senate District 5 — 48% (state senate)
AL Senate District 21 — 35% (state senate)
AL Senate District 24 — 17% (state senate)
AL House District 16 — 38% (state house)
AL House District 62 — 24% (state house)
AL House District 61 — 16% (state house)
AL House District 72 — 10% (state house)
AL House District 71 — 9% (state house)
AL House District 63 — 2% (state house)
AL House District 70 — 2% (state house)

Source

demographics: Census ACS 2023
districts: PostGIS area-intersection over Census TIGER 2024 boundaries

3.4 KiB Raw Blame History Unescape Escape

Tuscaloosa County, AL

Demographics (ACS 2023)

Districts

Source

3.4 KiB

Raw Blame History