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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. Clair County, IL

county

17163

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
253694	58413	151274	44007	73854	13.58	68.44	5.96	180300	0.452	12.79	152523	70726	4174	642	12858	79633

to	rel	area_weight
us/states/il/districts/12	in-district	0.791

to	rel	area_weight
us/states/il/districts/13	in-district	0.209

to	rel	area_weight
us/states/il/districts/senate/57	in-district	0.7672

to	rel	area_weight
us/states/il/districts/senate/58	in-district	0.0995

to	rel	area_weight
us/states/il/districts/senate/55	in-district	0.08

to	rel	area_weight
us/states/il/districts/senate/56	in-district	0.0532

to	rel	area_weight
us/states/il/districts/house/114	in-district	0.6409

to	rel	area_weight
us/states/il/districts/house/113	in-district	0.1263

to	rel	area_weight
us/states/il/districts/house/115	in-district	0.0995

to	rel	area_weight
us/states/il/districts/house/109	in-district	0.08

to	rel	area_weight
us/states/il/districts/house/112	in-district	0.0532

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

St. Clair County, IL

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	253694
Under 18	58413
18–64	151274
65+	44007
Median household income	73854
Poverty rate	13.58
Homeownership rate	68.44
Unemployment rate	5.96
Median home value	180300
Gini index	0.452
Vacancy rate	12.79
White	152523
Black	70726
Asian	4174
Native	642
Hispanic/Latino	12858
Bachelor's or higher	79633

Districts

IL-12 — 79% (congressional)
IL-13 — 21% (congressional)
IL Senate District 57 — 77% (state senate)
IL Senate District 58 — 10% (state senate)
IL Senate District 55 — 8% (state senate)
IL Senate District 56 — 5% (state senate)
IL House District 114 — 64% (state house)
IL House District 113 — 13% (state house)
IL House District 115 — 10% (state house)
IL House District 109 — 8% (state house)
IL House District 112 — 5% (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. Clair County, IL

Demographics (ACS 2023)

Districts

Source

3.2 KiB

Raw Blame History