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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

Madison County, IL

county

17119

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
264238	56348	158956	48934	75793	11.06	74.2	4.59	173000	0.4409	7.58	219413	20666	2245	500	11399	78034

to	rel	area_weight
us/states/il/districts/15	in-district	0.6262

to	rel	area_weight
us/states/il/districts/13	in-district	0.3737

to	rel	area_weight
us/states/il/districts/senate/55	in-district	0.5584

to	rel	area_weight
us/states/il/districts/senate/56	in-district	0.2819

to	rel	area_weight
us/states/il/districts/senate/50	in-district	0.1536

to	rel	area_weight
us/states/il/districts/senate/57	in-district	0.0061

to	rel	area_weight
us/states/il/districts/house/109	in-district	0.5584

to	rel	area_weight
us/states/il/districts/house/111	in-district	0.1817

to	rel	area_weight
us/states/il/districts/house/100	in-district	0.1536

to	rel	area_weight
us/states/il/districts/house/112	in-district	0.1002

to	rel	area_weight
us/states/il/districts/house/113	in-district	0.0061

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Madison County, IL

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	264238
Under 18	56348
18–64	158956
65+	48934
Median household income	75793
Poverty rate	11.06
Homeownership rate	74.2
Unemployment rate	4.59
Median home value	173000
Gini index	0.4409
Vacancy rate	7.58
White	219413
Black	20666
Asian	2245
Native	500
Hispanic/Latino	11399
Bachelor's or higher	78034

Districts

IL-15 — 63% (congressional)
IL-13 — 37% (congressional)
IL Senate District 55 — 56% (state senate)
IL Senate District 56 — 28% (state senate)
IL Senate District 50 — 15% (state senate)
IL Senate District 57 — 1% (state senate)
IL House District 109 — 56% (state house)
IL House District 111 — 18% (state house)
IL House District 100 — 15% (state house)
IL House District 112 — 10% (state house)
IL House District 113 — 1% (state house)

Source

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

3.2 KiB Raw Blame History Unescape Escape

Madison County, IL

Demographics (ACS 2023)

Districts

Source

3.2 KiB

Raw Blame History