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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

5.1 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

Charleston County, SC

county

45019

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
420264	81885	263351	75028	88494	11.32	63.89	3.45	489100	0.5114	14.69	276973	96255	7521	1909	30143	213030

to	rel	area_weight
us/states/sc/districts/01	in-district	0.4967

to	rel	area_weight
us/states/sc/districts/06	in-district	0.2493

to	rel	area_weight
us/states/sc/districts/senate/32	in-district	0.1943

to	rel	area_weight
us/states/sc/districts/senate/45	in-district	0.1833

to	rel	area_weight
us/states/sc/districts/senate/43	in-district	0.1591

to	rel	area_weight
us/states/sc/districts/senate/41	in-district	0.0979

to	rel	area_weight
us/states/sc/districts/senate/42	in-district	0.0444

to	rel	area_weight
us/states/sc/districts/senate/20	in-district	0.0366

to	rel	area_weight
us/states/sc/districts/senate/37	in-district	0.0172

to	rel	area_weight
us/states/sc/districts/senate/44	in-district	0.0125

to	rel	area_weight
us/states/sc/districts/house/116	in-district	0.2681

to	rel	area_weight
us/states/sc/districts/house/108	in-district	0.1745

to	rel	area_weight
us/states/sc/districts/house/112	in-district	0.0849

to	rel	area_weight
us/states/sc/districts/house/115	in-district	0.0808

to	rel	area_weight
us/states/sc/districts/house/119	in-district	0.0261

to	rel	area_weight
us/states/sc/districts/house/113	in-district	0.0242

to	rel	area_weight
us/states/sc/districts/house/114	in-district	0.0219

to	rel	area_weight
us/states/sc/districts/house/80	in-district	0.0213

to	rel	area_weight
us/states/sc/districts/house/110	in-district	0.0155

to	rel	area_weight
us/states/sc/districts/house/111	in-district	0.0129

to	rel	area_weight
us/states/sc/districts/house/109	in-district	0.0106

to	rel	area_weight
us/states/sc/districts/house/15	in-district	0.007

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Charleston County, SC

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	420264
Under 18	81885
18–64	263351
65+	75028
Median household income	88494
Poverty rate	11.32
Homeownership rate	63.89
Unemployment rate	3.45
Median home value	489100
Gini index	0.5114
Vacancy rate	14.69
White	276973
Black	96255
Asian	7521
Native	1909
Hispanic/Latino	30143
Bachelor's or higher	213030

Districts

SC-01 — 50% (congressional)
SC-06 — 25% (congressional)
SC Senate District 32 — 19% (state senate)
SC Senate District 45 — 18% (state senate)
SC Senate District 43 — 16% (state senate)
SC Senate District 41 — 10% (state senate)
SC Senate District 42 — 4% (state senate)
SC Senate District 20 — 4% (state senate)
SC Senate District 37 — 2% (state senate)
SC Senate District 44 — 1% (state senate)
SC House District 116 — 27% (state house)
SC House District 108 — 17% (state house)
SC House District 112 — 8% (state house)
SC House District 115 — 8% (state house)
SC House District 119 — 3% (state house)
SC House District 113 — 2% (state house)
SC House District 114 — 2% (state house)
SC House District 80 — 2% (state house)
SC House District 110 — 2% (state house)
SC House District 111 — 1% (state house)
SC House District 109 — 1% (state house)
SC House District 15 — 1% (state house)

Source

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

5.1 KiB Raw Blame History Unescape Escape

Charleston County, SC

Demographics (ACS 2023)

Districts

Source

5.1 KiB

Raw Blame History