Files
republic-os/data/jurisdictions/us/states/sc/counties/sumter/index.md
T
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

2.9 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 Sumter County, SC county 45085 SC
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
104725 24823 61296 18606 56693 16.56 68.13 6.87 165300 0.4615 13.66 46981 48127 1553 568 4655 22623
to rel area_weight
us/states/sc/districts/05 in-district 0.6852
to rel area_weight
us/states/sc/districts/06 in-district 0.314
to rel area_weight
us/states/sc/districts/senate/35 in-district 0.5495
to rel area_weight
us/states/sc/districts/senate/36 in-district 0.2924
to rel area_weight
us/states/sc/districts/senate/29 in-district 0.1579
to rel area_weight
us/states/sc/districts/house/64 in-district 0.3371
to rel area_weight
us/states/sc/districts/house/50 in-district 0.3173
to rel area_weight
us/states/sc/districts/house/51 in-district 0.2091
to rel area_weight
us/states/sc/districts/house/67 in-district 0.1363
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
sc
2026-07-03

Sumter County, SC

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure Value
Population 104725
Under 18 24823
1864 61296
65+ 18606
Median household income 56693
Poverty rate 16.56
Homeownership rate 68.13
Unemployment rate 6.87
Median home value 165300
Gini index 0.4615
Vacancy rate 13.66
White 46981
Black 48127
Asian 1553
Native 568
Hispanic/Latino 4655
Bachelor's or higher 22623

Districts

Source

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