Files
republic-os/data/jurisdictions/us/states/va/counties/louisa/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

2.2 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 Louisa County, VA county 51109 VA
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
39980 7993 23583 8404 86689 10.03 82.23 5.84 315300 0.4414 15.27 30890 4640 242 183 1659 12339
to rel area_weight
us/states/va/districts/05 in-district 0.9966
to rel area_weight
us/states/va/districts/senate/10 in-district 0.7778
to rel area_weight
us/states/va/districts/senate/11 in-district 0.2219
to rel area_weight
us/states/va/districts/house/59 in-district 0.7777
to rel area_weight
us/states/va/districts/house/55 in-district 0.2219
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
va
2026-07-03

Louisa County, VA

County jurisdiction.

Demographics (ACS 2023)

Measure Value
Population 39980
Under 18 7993
1864 23583
65+ 8404
Median household income 86689
Poverty rate 10.03
Homeownership rate 82.23
Unemployment rate 5.84
Median home value 315300
Gini index 0.4414
Vacancy rate 15.27
White 30890
Black 4640
Asian 242
Native 183
Hispanic/Latino 1659
Bachelor's or higher 12339

Districts

Source

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