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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

Horry County, SC

county

45051

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
383016	64964	217073	100979	66880	13.24	77.26	4.88	287700	0.4497	26.97	293496	45064	5250	1034	28001	105764

to	rel	area_weight
us/states/sc/districts/07	in-district	0.9119

to	rel	area_weight
us/states/sc/districts/senate/30	in-district	0.3385

to	rel	area_weight
us/states/sc/districts/senate/28	in-district	0.303

to	rel	area_weight
us/states/sc/districts/senate/33	in-district	0.1083

to	rel	area_weight
us/states/sc/districts/senate/32	in-district	0.1068

to	rel	area_weight
us/states/sc/districts/senate/34	in-district	0.0556

to	rel	area_weight
us/states/sc/districts/house/105	in-district	0.2174

to	rel	area_weight
us/states/sc/districts/house/58	in-district	0.1989

to	rel	area_weight
us/states/sc/districts/house/57	in-district	0.1762

to	rel	area_weight
us/states/sc/districts/house/55	in-district	0.0671

to	rel	area_weight
us/states/sc/districts/house/104	in-district	0.0598

to	rel	area_weight
us/states/sc/districts/house/103	in-district	0.0458

to	rel	area_weight
us/states/sc/districts/house/56	in-district	0.0448

to	rel	area_weight
us/states/sc/districts/house/68	in-district	0.0344

to	rel	area_weight
us/states/sc/districts/house/107	in-district	0.0237

to	rel	area_weight
us/states/sc/districts/house/61	in-district	0.0232

to	rel	area_weight
us/states/sc/districts/house/106	in-district	0.0208

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Horry County, SC

County jurisdiction — 3 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	383016
Under 18	64964
18–64	217073
65+	100979
Median household income	66880
Poverty rate	13.24
Homeownership rate	77.26
Unemployment rate	4.88
Median home value	287700
Gini index	0.4497
Vacancy rate	26.97
White	293496
Black	45064
Asian	5250
Native	1034
Hispanic/Latino	28001
Bachelor's or higher	105764

Districts

SC-07 — 91% (congressional)
SC Senate District 30 — 34% (state senate)
SC Senate District 28 — 30% (state senate)
SC Senate District 33 — 11% (state senate)
SC Senate District 32 — 11% (state senate)
SC Senate District 34 — 6% (state senate)
SC House District 105 — 22% (state house)
SC House District 58 — 20% (state house)
SC House District 57 — 18% (state house)
SC House District 55 — 7% (state house)
SC House District 104 — 6% (state house)
SC House District 103 — 5% (state house)
SC House District 56 — 4% (state house)
SC House District 68 — 3% (state house)
SC House District 107 — 2% (state house)
SC House District 61 — 2% (state house)
SC House District 106 — 2% (state house)

Source

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

4.3 KiB Raw Blame History Unescape Escape

Horry County, SC

Demographics (ACS 2023)

Districts

Source

4.3 KiB

Raw Blame History