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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

3.3 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

Caddo Parish, LA

county

22017

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
230004	54012	132543	43449	50705	22.38	60.21	8.71	175700	0.523	14.95	98597	112324	2889	624	8793	58095

to	rel	area_weight
us/states/la/districts/04	in-district	0.8736

to	rel	area_weight
us/states/la/districts/06	in-district	0.126

to	rel	area_weight
us/states/la/districts/senate/39	in-district	0.5524

to	rel	area_weight
us/states/la/districts/senate/38	in-district	0.3621

to	rel	area_weight
us/states/la/districts/senate/31	in-district	0.0848

to	rel	area_weight
us/states/la/districts/house/1	in-district	0.7287

to	rel	area_weight
us/states/la/districts/house/5	in-district	0.0936

to	rel	area_weight
us/states/la/districts/house/4	in-district	0.0836

to	rel	area_weight
us/states/la/districts/house/7	in-district	0.0283

to	rel	area_weight
us/states/la/districts/house/3	in-district	0.023

to	rel	area_weight
us/states/la/districts/house/6	in-district	0.0229

to	rel	area_weight
us/states/la/districts/house/2	in-district	0.0192

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Caddo Parish, LA

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	230004
Under 18	54012
18–64	132543
65+	43449
Median household income	50705
Poverty rate	22.38
Homeownership rate	60.21
Unemployment rate	8.71
Median home value	175700
Gini index	0.523
Vacancy rate	14.95
White	98597
Black	112324
Asian	2889
Native	624
Hispanic/Latino	8793
Bachelor's or higher	58095

Districts

LA-04 — 87% (congressional)
LA-06 — 13% (congressional)
LA Senate District 39 — 55% (state senate)
LA Senate District 38 — 36% (state senate)
LA Senate District 31 — 8% (state senate)
LA House District 1 — 73% (state house)
LA House District 5 — 9% (state house)
LA House District 4 — 8% (state house)
LA House District 7 — 3% (state house)
LA House District 3 — 2% (state house)
LA House District 6 — 2% (state house)
LA House District 2 — 2% (state house)

Source

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

3.3 KiB Raw Blame History Unescape Escape

Caddo Parish, LA

Demographics (ACS 2023)

Districts

Source

3.3 KiB

Raw Blame History