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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

5.5 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

Greenville County, SC

county

45045

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
548166	125442	331040	91684	76932	10.83	68.93	4.36	299000	0.4661	7.43	366157	85988	13813	3377	63570	212477

to	rel	area_weight
us/states/sc/districts/04	in-district	0.7493

to	rel	area_weight
us/states/sc/districts/03	in-district	0.2493

to	rel	area_weight
us/states/sc/districts/senate/5	in-district	0.4463

to	rel	area_weight
us/states/sc/districts/senate/9	in-district	0.1904

to	rel	area_weight
us/states/sc/districts/senate/7	in-district	0.1162

to	rel	area_weight
us/states/sc/districts/senate/6	in-district	0.1023

to	rel	area_weight
us/states/sc/districts/senate/8	in-district	0.088

to	rel	area_weight
us/states/sc/districts/senate/12	in-district	0.0234

to	rel	area_weight
us/states/sc/districts/senate/13	in-district	0.0207

to	rel	area_weight
us/states/sc/districts/senate/2	in-district	0.0118

to	rel	area_weight
us/states/sc/districts/house/17	in-district	0.3769

to	rel	area_weight
us/states/sc/districts/house/28	in-district	0.1566

to	rel	area_weight
us/states/sc/districts/house/18	in-district	0.0908

to	rel	area_weight
us/states/sc/districts/house/25	in-district	0.0713

to	rel	area_weight
us/states/sc/districts/house/16	in-district	0.0525

to	rel	area_weight
us/states/sc/districts/house/19	in-district	0.0382

to	rel	area_weight
us/states/sc/districts/house/20	in-district	0.0307

to	rel	area_weight
us/states/sc/districts/house/21	in-district	0.0307

to	rel	area_weight
us/states/sc/districts/house/27	in-district	0.0288

to	rel	area_weight
us/states/sc/districts/house/24	in-district	0.0274

to	rel	area_weight
us/states/sc/districts/house/7	in-district	0.026

to	rel	area_weight
us/states/sc/districts/house/22	in-district	0.0227

to	rel	area_weight
us/states/sc/districts/house/23	in-district	0.0195

to	rel	area_weight
us/states/sc/districts/house/35	in-district	0.0116

to	rel	area_weight
us/states/sc/districts/house/10	in-district	0.0104

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Greenville County, SC

County jurisdiction — 3 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	548166
Under 18	125442
18–64	331040
65+	91684
Median household income	76932
Poverty rate	10.83
Homeownership rate	68.93
Unemployment rate	4.36
Median home value	299000
Gini index	0.4661
Vacancy rate	7.43
White	366157
Black	85988
Asian	13813
Native	3377
Hispanic/Latino	63570
Bachelor's or higher	212477

Districts

SC-04 — 75% (congressional)
SC-03 — 25% (congressional)
SC Senate District 5 — 45% (state senate)
SC Senate District 9 — 19% (state senate)
SC Senate District 7 — 12% (state senate)
SC Senate District 6 — 10% (state senate)
SC Senate District 8 — 9% (state senate)
SC Senate District 12 — 2% (state senate)
SC Senate District 13 — 2% (state senate)
SC Senate District 2 — 1% (state senate)
SC House District 17 — 38% (state house)
SC House District 28 — 16% (state house)
SC House District 18 — 9% (state house)
SC House District 25 — 7% (state house)
SC House District 16 — 5% (state house)
SC House District 19 — 4% (state house)
SC House District 20 — 3% (state house)
SC House District 21 — 3% (state house)
SC House District 27 — 3% (state house)
SC House District 24 — 3% (state house)
SC House District 7 — 3% (state house)
SC House District 22 — 2% (state house)
SC House District 23 — 2% (state house)
SC House District 35 — 1% (state house)
SC House District 10 — 1% (state house)

Source

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

5.5 KiB Raw Blame History Unescape Escape

Greenville County, SC

Demographics (ACS 2023)

Districts

Source

5.5 KiB

Raw Blame History