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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

4.1 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

Arapahoe County, CO

county

08005

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
659844	149062	415649	95133	101087	8.64	64.74	4.97	561200	0.4533	4.5	390363	71991	40139	6769	143439	294677

to	rel	area_weight
us/states/co/districts/04	in-district	0.7584

to	rel	area_weight
us/states/co/districts/06	in-district	0.2389

to	rel	area_weight
us/states/co/districts/senate/27	in-district	0.2137

to	rel	area_weight
us/states/co/districts/senate/28	in-district	0.1205

to	rel	area_weight
us/states/co/districts/senate/26	in-district	0.0355

to	rel	area_weight
us/states/co/districts/senate/16	in-district	0.0348

to	rel	area_weight
us/states/co/districts/senate/29	in-district	0.0291

to	rel	area_weight
us/states/co/districts/house/56	in-district	0.7391

to	rel	area_weight
us/states/co/districts/house/36	in-district	0.077

to	rel	area_weight
us/states/co/districts/house/37	in-district	0.0428

to	rel	area_weight
us/states/co/districts/house/61	in-district	0.0306

to	rel	area_weight
us/states/co/districts/house/38	in-district	0.0274

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

to	rel	area_weight
us/states/co/districts/house/3	in-district	0.0196

to	rel	area_weight
us/states/co/districts/house/41	in-district	0.0168

to	rel	area_weight
us/states/co/districts/house/42	in-district	0.0161

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Arapahoe County, CO

County jurisdiction — 3 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	659844
Under 18	149062
18–64	415649
65+	95133
Median household income	101087
Poverty rate	8.64
Homeownership rate	64.74
Unemployment rate	4.97
Median home value	561200
Gini index	0.4533
Vacancy rate	4.5
White	390363
Black	71991
Asian	40139
Native	6769
Hispanic/Latino	143439
Bachelor's or higher	294677

Districts

CO-04 — 76% (congressional)
CO-06 — 24% (congressional)
CO Senate District 27 — 21% (state senate)
CO Senate District 28 — 12% (state senate)
CO Senate District 26 — 4% (state senate)
CO Senate District 16 — 3% (state senate)
CO Senate District 29 — 3% (state senate)
CO House District 56 — 74% (state house)
CO House District 36 — 8% (state house)
CO House District 37 — 4% (state house)
CO House District 61 — 3% (state house)
CO House District 38 — 3% (state house)
CO House District 40 — 3% (state house)
CO House District 3 — 2% (state house)
CO House District 41 — 2% (state house)
CO House District 42 — 2% (state house)

Source

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

4.1 KiB Raw Blame History Unescape Escape

Arapahoe County, CO

Demographics (ACS 2023)

Districts

Source

4.1 KiB

Raw Blame History