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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

3.4 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

Hamilton County, IN

county

18057

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
365056	92736	221647	50673	121530	4.39	76.08	2.78	405500	0.4333	5.18	292742	16360	25107	341	20577	207834

to	rel	area_weight
us/states/in/districts/05	in-district	0.9999

to	rel	area_weight
us/states/in/districts/senate/20	in-district	0.3418

to	rel	area_weight
us/states/in/districts/senate/21	in-district	0.2593

to	rel	area_weight
us/states/in/districts/senate/25	in-district	0.204

to	rel	area_weight
us/states/in/districts/senate/31	in-district	0.1276

to	rel	area_weight
us/states/in/districts/senate/29	in-district	0.0672

to	rel	area_weight
us/states/in/districts/house/37	in-district	0.4251

to	rel	area_weight
us/states/in/districts/house/24	in-district	0.2782

to	rel	area_weight
us/states/in/districts/house/29	in-district	0.1239

to	rel	area_weight
us/states/in/districts/house/32	in-district	0.0761

to	rel	area_weight
us/states/in/districts/house/39	in-district	0.07

to	rel	area_weight
us/states/in/districts/house/88	in-district	0.0265

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Hamilton County, IN

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	365056
Under 18	92736
18–64	221647
65+	50673
Median household income	121530
Poverty rate	4.39
Homeownership rate	76.08
Unemployment rate	2.78
Median home value	405500
Gini index	0.4333
Vacancy rate	5.18
White	292742
Black	16360
Asian	25107
Native	341
Hispanic/Latino	20577
Bachelor's or higher	207834

Districts

IN-05 — 100% (congressional)
IN Senate District 20 — 34% (state senate)
IN Senate District 21 — 26% (state senate)
IN Senate District 25 — 20% (state senate)
IN Senate District 31 — 13% (state senate)
IN Senate District 29 — 7% (state senate)
IN House District 37 — 43% (state house)
IN House District 24 — 28% (state house)
IN House District 29 — 12% (state house)
IN House District 32 — 8% (state house)
IN House District 39 — 7% (state house)
IN House District 88 — 3% (state house)

Source

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

3.4 KiB Raw Blame History Unescape Escape

Hamilton County, IN

Demographics (ACS 2023)

Districts

Source

3.4 KiB

Raw Blame History