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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

4.0 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

Flathead County, MT

county

30029

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
110695	23948	63395	23352	73925	9.32	72.36	2.93	535500	0.4566	14.41	100831	236	931	976	4076	39876

to	rel	area_weight
us/states/mt/districts/01	in-district	0.9998

to	rel	area_weight
us/states/mt/districts/senate/2	in-district	0.4298

to	rel	area_weight
us/states/mt/districts/senate/8	in-district	0.2421

to	rel	area_weight
us/states/mt/districts/senate/1	in-district	0.1025

to	rel	area_weight
us/states/mt/districts/senate/3	in-district	0.086

to	rel	area_weight
us/states/mt/districts/senate/6	in-district	0.0766

to	rel	area_weight
us/states/mt/districts/senate/5	in-district	0.0602

to	rel	area_weight
us/states/mt/districts/house/3	in-district	0.4268

to	rel	area_weight
us/states/mt/districts/house/15	in-district	0.2421

to	rel	area_weight
us/states/mt/districts/house/2	in-district	0.1025

to	rel	area_weight
us/states/mt/districts/house/11	in-district	0.0666

to	rel	area_weight
us/states/mt/districts/house/6	in-district	0.0491

to	rel	area_weight
us/states/mt/districts/house/9	in-district	0.0491

to	rel	area_weight
us/states/mt/districts/house/5	in-district	0.0369

to	rel	area_weight
us/states/mt/districts/house/10	in-district	0.011

to	rel	area_weight
us/states/mt/districts/house/12	in-district	0.01

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Flathead County, MT

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	110695
Under 18	23948
18–64	63395
65+	23352
Median household income	73925
Poverty rate	9.32
Homeownership rate	72.36
Unemployment rate	2.93
Median home value	535500
Gini index	0.4566
Vacancy rate	14.41
White	100831
Black	236
Asian	931
Native	976
Hispanic/Latino	4076
Bachelor's or higher	39876

Districts

MT-01 — 100% (congressional)
MT Senate District 2 — 43% (state senate)
MT Senate District 8 — 24% (state senate)
MT Senate District 1 — 10% (state senate)
MT Senate District 3 — 9% (state senate)
MT Senate District 6 — 8% (state senate)
MT Senate District 5 — 6% (state senate)
MT House District 3 — 43% (state house)
MT House District 15 — 24% (state house)
MT House District 2 — 10% (state house)
MT House District 11 — 7% (state house)
MT House District 6 — 5% (state house)
MT House District 9 — 5% (state house)
MT House District 5 — 4% (state house)
MT House District 10 — 1% (state house)
MT House District 12 — 1% (state house)

Source

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

4.0 KiB Raw Blame History Unescape Escape

Flathead County, MT

Demographics (ACS 2023)

Districts

Source

4.0 KiB

Raw Blame History