Files
republic-os/data/jurisdictions/us/states/in/counties/elkhart/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

2.7 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 Elkhart County, IN county 18039 IN
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
207132 56707 118482 31943 68561 12.4 71.57 3.6 210400 0.4367 10.17 152453 10034 2043 1349 41619 36070
to rel area_weight
us/states/in/districts/02 in-district 0.9996
to rel area_weight
us/states/in/districts/senate/12 in-district 0.5299
to rel area_weight
us/states/in/districts/senate/9 in-district 0.2686
to rel area_weight
us/states/in/districts/senate/11 in-district 0.2013
to rel area_weight
us/states/in/districts/house/49 in-district 0.3583
to rel area_weight
us/states/in/districts/house/21 in-district 0.3111
to rel area_weight
us/states/in/districts/house/48 in-district 0.1699
to rel area_weight
us/states/in/districts/house/18 in-district 0.1604
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
in
2026-07-03

Elkhart County, IN

County jurisdiction.

Demographics (ACS 2023)

Measure Value
Population 207132
Under 18 56707
1864 118482
65+ 31943
Median household income 68561
Poverty rate 12.4
Homeownership rate 71.57
Unemployment rate 3.6
Median home value 210400
Gini index 0.4367
Vacancy rate 10.17
White 152453
Black 10034
Asian 2043
Native 1349
Hispanic/Latino 41619
Bachelor's or higher 36070

Districts

Source

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