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republic-os/data/jurisdictions/us/states/la/counties/st-martin-parish/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 St. Martin Parish, LA county 22099 LA
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
51353 12336 30183 8834 55960 15.26 77.73 4.0 164200 0.4651 17.83 32564 14690 390 93 1873 7397
to rel area_weight
us/states/la/districts/03 in-district 0.9961
to rel area_weight
us/states/la/districts/senate/22 in-district 0.6519
to rel area_weight
us/states/la/districts/senate/21 in-district 0.2598
to rel area_weight
us/states/la/districts/senate/17 in-district 0.0513
to rel area_weight
us/states/la/districts/senate/24 in-district 0.0369
to rel area_weight
us/states/la/districts/house/46 in-district 0.4673
to rel area_weight
us/states/la/districts/house/50 in-district 0.2597
to rel area_weight
us/states/la/districts/house/96 in-district 0.2342
to rel area_weight
us/states/la/districts/house/48 in-district 0.0386
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
la
2026-07-03

St. Martin Parish, LA

County jurisdiction.

Demographics (ACS 2023)

Measure Value
Population 51353
Under 18 12336
1864 30183
65+ 8834
Median household income 55960
Poverty rate 15.26
Homeownership rate 77.73
Unemployment rate 4.0
Median home value 164200
Gini index 0.4651
Vacancy rate 17.83
White 32564
Black 14690
Asian 390
Native 93
Hispanic/Latino 1873
Bachelor's or higher 7397

Districts

Source

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