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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

3.2 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

Knox County, TN

county

47093

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
494148	103518	310238	80392	74222	12.2	65.18	3.52	320900	0.4798	8.01	395602	39839	11422	747	31276	189644

to	rel	area_weight
us/states/tn/districts/02	in-district	0.9956

to	rel	area_weight
us/states/tn/districts/senate/6	in-district	0.6261

to	rel	area_weight
us/states/tn/districts/senate/7	in-district	0.2587

to	rel	area_weight
us/states/tn/districts/senate/5	in-district	0.1149

to	rel	area_weight
us/states/tn/districts/house/19	in-district	0.4187

to	rel	area_weight
us/states/tn/districts/house/89	in-district	0.1275

to	rel	area_weight
us/states/tn/districts/house/18	in-district	0.1272

to	rel	area_weight
us/states/tn/districts/house/16	in-district	0.1107

to	rel	area_weight
us/states/tn/districts/house/14	in-district	0.1048

to	rel	area_weight
us/states/tn/districts/house/15	in-district	0.0578

to	rel	area_weight
us/states/tn/districts/house/90	in-district	0.0529

field	source
demographics	Census ACS 2023

field	source
districts	PostGIS area-intersection over Census TIGER 2024 boundaries

official

jurisdiction

county

2026-07-03

Knox County, TN

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	494148
Under 18	103518
18–64	310238
65+	80392
Median household income	74222
Poverty rate	12.2
Homeownership rate	65.18
Unemployment rate	3.52
Median home value	320900
Gini index	0.4798
Vacancy rate	8.01
White	395602
Black	39839
Asian	11422
Native	747
Hispanic/Latino	31276
Bachelor's or higher	189644

Districts

TN-02 — 100% (congressional)
TN Senate District 6 — 63% (state senate)
TN Senate District 7 — 26% (state senate)
TN Senate District 5 — 11% (state senate)
TN House District 19 — 42% (state house)
TN House District 89 — 13% (state house)
TN House District 18 — 13% (state house)
TN House District 16 — 11% (state house)
TN House District 14 — 10% (state house)
TN House District 15 — 6% (state house)
TN House District 90 — 5% (state house)

Source

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

3.2 KiB Raw Blame History Unescape Escape

Knox County, TN

Demographics (ACS 2023)

Districts

Source

3.2 KiB

Raw Blame History