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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

4.2 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

Lexington County, SC

county

45063

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
304887	70033	182765	52089	77408	11.11	77.4	4.46	234500	0.4289	8.24	219424	46578	6738	792	24118	99915

to	rel	area_weight
us/states/sc/districts/02	in-district	0.9976

to	rel	area_weight
us/states/sc/districts/senate/23	in-district	0.463

to	rel	area_weight
us/states/sc/districts/senate/25	in-district	0.1657

to	rel	area_weight
us/states/sc/districts/senate/26	in-district	0.1608

to	rel	area_weight
us/states/sc/districts/senate/18	in-district	0.1113

to	rel	area_weight
us/states/sc/districts/senate/10	in-district	0.0991

to	rel	area_weight
us/states/sc/districts/house/39	in-district	0.2189

to	rel	area_weight
us/states/sc/districts/house/96	in-district	0.2141

to	rel	area_weight
us/states/sc/districts/house/86	in-district	0.1022

to	rel	area_weight
us/states/sc/districts/house/87	in-district	0.0942

to	rel	area_weight
us/states/sc/districts/house/93	in-district	0.0898

to	rel	area_weight
us/states/sc/districts/house/85	in-district	0.0837

to	rel	area_weight
us/states/sc/districts/house/88	in-district	0.0831

to	rel	area_weight
us/states/sc/districts/house/69	in-district	0.05

to	rel	area_weight
us/states/sc/districts/house/89	in-district	0.0425

to	rel	area_weight
us/states/sc/districts/house/40	in-district	0.0152

to	rel	area_weight
us/states/sc/districts/house/71	in-district	0.0061

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Lexington County, SC

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	304887
Under 18	70033
18–64	182765
65+	52089
Median household income	77408
Poverty rate	11.11
Homeownership rate	77.4
Unemployment rate	4.46
Median home value	234500
Gini index	0.4289
Vacancy rate	8.24
White	219424
Black	46578
Asian	6738
Native	792
Hispanic/Latino	24118
Bachelor's or higher	99915

Districts

SC-02 — 100% (congressional)
SC Senate District 23 — 46% (state senate)
SC Senate District 25 — 17% (state senate)
SC Senate District 26 — 16% (state senate)
SC Senate District 18 — 11% (state senate)
SC Senate District 10 — 10% (state senate)
SC House District 39 — 22% (state house)
SC House District 96 — 21% (state house)
SC House District 86 — 10% (state house)
SC House District 87 — 9% (state house)
SC House District 93 — 9% (state house)
SC House District 85 — 8% (state house)
SC House District 88 — 8% (state house)
SC House District 69 — 5% (state house)
SC House District 89 — 4% (state house)
SC House District 40 — 2% (state house)
SC House District 71 — 1% (state house)

Source

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

4.2 KiB Raw Blame History Unescape Escape

Lexington County, SC

Demographics (ACS 2023)

Districts

Source

4.2 KiB

Raw Blame History