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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

4.1 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

Lafayette Parish, LA

county

22055

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
247997	59948	151581	36468	67451	17.12	65.48	5.11	242900	0.5014	10.06	155592	62988	4794	298	16679	77815

to	rel	area_weight
us/states/la/districts/03	in-district	0.7519

to	rel	area_weight
us/states/la/districts/06	in-district	0.2481

to	rel	area_weight
us/states/la/districts/senate/23	in-district	0.3812

to	rel	area_weight
us/states/la/districts/senate/24	in-district	0.2764

to	rel	area_weight
us/states/la/districts/senate/26	in-district	0.2049

to	rel	area_weight
us/states/la/districts/senate/22	in-district	0.1164

to	rel	area_weight
us/states/la/districts/senate/17	in-district	0.0211

to	rel	area_weight
us/states/la/districts/house/39	in-district	0.2807

to	rel	area_weight
us/states/la/districts/house/42	in-district	0.1516

to	rel	area_weight
us/states/la/districts/house/31	in-district	0.1376

to	rel	area_weight
us/states/la/districts/house/44	in-district	0.1214

to	rel	area_weight
us/states/la/districts/house/43	in-district	0.101

to	rel	area_weight
us/states/la/districts/house/48	in-district	0.0696

to	rel	area_weight
us/states/la/districts/house/49	in-district	0.0691

to	rel	area_weight
us/states/la/districts/house/45	in-district	0.0593

to	rel	area_weight
us/states/la/districts/house/96	in-district	0.0095

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Lafayette Parish, LA

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	247997
Under 18	59948
18–64	151581
65+	36468
Median household income	67451
Poverty rate	17.12
Homeownership rate	65.48
Unemployment rate	5.11
Median home value	242900
Gini index	0.5014
Vacancy rate	10.06
White	155592
Black	62988
Asian	4794
Native	298
Hispanic/Latino	16679
Bachelor's or higher	77815

Districts

LA-03 — 75% (congressional)
LA-06 — 25% (congressional)
LA Senate District 23 — 38% (state senate)
LA Senate District 24 — 28% (state senate)
LA Senate District 26 — 20% (state senate)
LA Senate District 22 — 12% (state senate)
LA Senate District 17 — 2% (state senate)
LA House District 39 — 28% (state house)
LA House District 42 — 15% (state house)
LA House District 31 — 14% (state house)
LA House District 44 — 12% (state house)
LA House District 43 — 10% (state house)
LA House District 48 — 7% (state house)
LA House District 49 — 7% (state house)
LA House District 45 — 6% (state house)
LA House District 96 — 1% (state house)

Source

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

4.1 KiB Raw Blame History Unescape Escape

Lafayette Parish, LA

Demographics (ACS 2023)

Districts

Source

4.1 KiB

Raw Blame History