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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

Genesee County, MI

county

26049

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
403305	89589	237981	75735	62281	16.4	70.73	8.07	182400	0.4602	9.01	290657	77933	4378	1146	17176	87764

to	rel	area_weight
us/states/mi/districts/08	in-district	0.9954

to	rel	area_weight
us/states/mi/districts/senate/27	in-district	0.4431

to	rel	area_weight
us/states/mi/districts/senate/26	in-district	0.3895

to	rel	area_weight
us/states/mi/districts/senate/22	in-district	0.1122

to	rel	area_weight
us/states/mi/districts/senate/24	in-district	0.0552

to	rel	area_weight
us/states/mi/districts/house/69	in-district	0.2433

to	rel	area_weight
us/states/mi/districts/house/67	in-district	0.2089

to	rel	area_weight
us/states/mi/districts/house/68	in-district	0.1734

to	rel	area_weight
us/states/mi/districts/house/71	in-district	0.1382

to	rel	area_weight
us/states/mi/districts/house/72	in-district	0.1152

to	rel	area_weight
us/states/mi/districts/house/70	in-district	0.0622

to	rel	area_weight
us/states/mi/districts/house/97	in-district	0.0588

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Genesee County, MI

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	403305
Under 18	89589
18–64	237981
65+	75735
Median household income	62281
Poverty rate	16.4
Homeownership rate	70.73
Unemployment rate	8.07
Median home value	182400
Gini index	0.4602
Vacancy rate	9.01
White	290657
Black	77933
Asian	4378
Native	1146
Hispanic/Latino	17176
Bachelor's or higher	87764

Districts

MI-08 — 100% (congressional)
MI Senate District 27 — 44% (state senate)
MI Senate District 26 — 39% (state senate)
MI Senate District 22 — 11% (state senate)
MI Senate District 24 — 6% (state senate)
MI House District 69 — 24% (state house)
MI House District 67 — 21% (state house)
MI House District 68 — 17% (state house)
MI House District 71 — 14% (state house)
MI House District 72 — 12% (state house)
MI House District 70 — 6% (state house)
MI House District 97 — 6% (state house)

Source

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

3.4 KiB Raw Blame History Unescape Escape

Genesee County, MI

Demographics (ACS 2023)

Districts

Source

3.4 KiB

Raw Blame History