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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

4.3 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

Yellowstone County, MT

county

30111

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
168957	38803	99262	30892	76570	9.19	69.62	3.38	349500	0.4568	5.85	144550	1146	1298	6682	11144	52017

to	rel	area_weight
us/states/mt/districts/02	in-district	1.0

to	rel	area_weight
us/states/mt/districts/senate/18	in-district	0.4084

to	rel	area_weight
us/states/mt/districts/senate/19	in-district	0.263

to	rel	area_weight
us/states/mt/districts/senate/21	in-district	0.145

to	rel	area_weight
us/states/mt/districts/senate/27	in-district	0.0999

to	rel	area_weight
us/states/mt/districts/senate/22	in-district	0.034

to	rel	area_weight
us/states/mt/districts/senate/20	in-district	0.0289

to	rel	area_weight
us/states/mt/districts/senate/26	in-district	0.0098

to	rel	area_weight
us/states/mt/districts/senate/24	in-district	0.0057

to	rel	area_weight
us/states/mt/districts/house/35	in-district	0.4084

to	rel	area_weight
us/states/mt/districts/house/38	in-district	0.263

to	rel	area_weight
us/states/mt/districts/house/42	in-district	0.145

to	rel	area_weight
us/states/mt/districts/house/54	in-district	0.0728

to	rel	area_weight
us/states/mt/districts/house/44	in-district	0.0328

to	rel	area_weight
us/states/mt/districts/house/53	in-district	0.0271

to	rel	area_weight
us/states/mt/districts/house/40	in-district	0.0258

to	rel	area_weight
us/states/mt/districts/house/52	in-district	0.0086

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Yellowstone County, MT

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	168957
Under 18	38803
18–64	99262
65+	30892
Median household income	76570
Poverty rate	9.19
Homeownership rate	69.62
Unemployment rate	3.38
Median home value	349500
Gini index	0.4568
Vacancy rate	5.85
White	144550
Black	1146
Asian	1298
Native	6682
Hispanic/Latino	11144
Bachelor's or higher	52017

Districts

MT-02 — 100% (congressional)
MT Senate District 18 — 41% (state senate)
MT Senate District 19 — 26% (state senate)
MT Senate District 21 — 14% (state senate)
MT Senate District 27 — 10% (state senate)
MT Senate District 22 — 3% (state senate)
MT Senate District 20 — 3% (state senate)
MT Senate District 26 — 1% (state senate)
MT Senate District 24 — 1% (state senate)
MT House District 35 — 41% (state house)
MT House District 38 — 26% (state house)
MT House District 42 — 14% (state house)
MT House District 54 — 7% (state house)
MT House District 44 — 3% (state house)
MT House District 53 — 3% (state house)
MT House District 40 — 3% (state house)
MT House District 52 — 1% (state house)

Source

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

4.3 KiB Raw Blame History Unescape Escape

Yellowstone County, MT

Demographics (ACS 2023)

Districts

Source

4.3 KiB

Raw Blame History