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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

3.2 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

St. Tammany Parish, LA

county

22103

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
272421	64297	157886	50238	81202	11.4	78.87	4.76	284000	0.4592	7.75	201130	33305	3711	2079	22407	95638

to	rel	area_weight
us/states/la/districts/01	in-district	0.9907

to	rel	area_weight
us/states/la/districts/senate/1	in-district	0.2959

to	rel	area_weight
us/states/la/districts/senate/12	in-district	0.2819

to	rel	area_weight
us/states/la/districts/senate/11	in-district	0.2049

to	rel	area_weight
us/states/la/districts/senate/37	in-district	0.029

to	rel	area_weight
us/states/la/districts/house/74	in-district	0.3926

to	rel	area_weight
us/states/la/districts/house/89	in-district	0.2263

to	rel	area_weight
us/states/la/districts/house/104	in-district	0.1442

to	rel	area_weight
us/states/la/districts/house/76	in-district	0.1177

to	rel	area_weight
us/states/la/districts/house/77	in-district	0.0667

to	rel	area_weight
us/states/la/districts/house/90	in-district	0.0424

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

St. Tammany Parish, LA

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	272421
Under 18	64297
18–64	157886
65+	50238
Median household income	81202
Poverty rate	11.4
Homeownership rate	78.87
Unemployment rate	4.76
Median home value	284000
Gini index	0.4592
Vacancy rate	7.75
White	201130
Black	33305
Asian	3711
Native	2079
Hispanic/Latino	22407
Bachelor's or higher	95638

Districts

LA-01 — 99% (congressional)
LA Senate District 1 — 30% (state senate)
LA Senate District 12 — 28% (state senate)
LA Senate District 11 — 20% (state senate)
LA Senate District 37 — 3% (state senate)
LA House District 74 — 39% (state house)
LA House District 89 — 23% (state house)
LA House District 104 — 14% (state house)
LA House District 76 — 12% (state house)
LA House District 77 — 7% (state house)
LA House District 90 — 4% (state house)

Source

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

3.2 KiB Raw Blame History Unescape Escape

St. Tammany Parish, LA

Demographics (ACS 2023)

Districts

Source

3.2 KiB

Raw Blame History