Files
republic-os/data/jurisdictions/us/states/tn/counties/hamilton/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 Hamilton County, TN county 47065 TN
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
376192 79311 227795 69086 76183 13.08 63.91 4.37 312800 0.485 8.23 264229 64101 7861 1084 30267 136472
to rel area_weight
us/states/tn/districts/03 in-district 0.997
to rel area_weight
us/states/tn/districts/senate/11 in-district 0.7795
to rel area_weight
us/states/tn/districts/senate/10 in-district 0.2203
to rel area_weight
us/states/tn/districts/house/27 in-district 0.317
to rel area_weight
us/states/tn/districts/house/29 in-district 0.2611
to rel area_weight
us/states/tn/districts/house/26 in-district 0.2396
to rel area_weight
us/states/tn/districts/house/30 in-district 0.0986
to rel area_weight
us/states/tn/districts/house/28 in-district 0.0834
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
tn
2026-07-03

Hamilton County, TN

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure Value
Population 376192
Under 18 79311
1864 227795
65+ 69086
Median household income 76183
Poverty rate 13.08
Homeownership rate 63.91
Unemployment rate 4.37
Median home value 312800
Gini index 0.485
Vacancy rate 8.23
White 264229
Black 64101
Asian 7861
Native 1084
Hispanic/Latino 30267
Bachelor's or higher 136472

Districts

Source

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