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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

4.7 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

Shelby County, TN

county

47157

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
919173	233802	549321	136050	63767	17.82	54.14	7.2	249100	0.513	10.29	312512	482006	27121	3475	81334	292293

to	rel	area_weight
us/states/tn/districts/09	in-district	0.6959

to	rel	area_weight
us/states/tn/districts/08	in-district	0.3022

to	rel	area_weight
us/states/tn/districts/senate/29	in-district	0.3966

to	rel	area_weight
us/states/tn/districts/senate/31	in-district	0.2158

to	rel	area_weight
us/states/tn/districts/senate/32	in-district	0.171

to	rel	area_weight
us/states/tn/districts/senate/33	in-district	0.1142

to	rel	area_weight
us/states/tn/districts/senate/30	in-district	0.1006

to	rel	area_weight
us/states/tn/districts/house/86	in-district	0.2899

to	rel	area_weight
us/states/tn/districts/house/99	in-district	0.2111

to	rel	area_weight
us/states/tn/districts/house/95	in-district	0.1056

to	rel	area_weight
us/states/tn/districts/house/85	in-district	0.0492

to	rel	area_weight
us/states/tn/districts/house/88	in-district	0.0452

to	rel	area_weight
us/states/tn/districts/house/97	in-district	0.0445

to	rel	area_weight
us/states/tn/districts/house/83	in-district	0.0441

to	rel	area_weight
us/states/tn/districts/house/84	in-district	0.0413

to	rel	area_weight
us/states/tn/districts/house/96	in-district	0.0399

to	rel	area_weight
us/states/tn/districts/house/98	in-district	0.0352

to	rel	area_weight
us/states/tn/districts/house/91	in-district	0.035

to	rel	area_weight
us/states/tn/districts/house/87	in-district	0.0305

to	rel	area_weight
us/states/tn/districts/house/93	in-district	0.0265

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Shelby County, TN

County jurisdiction — 3 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	919173
Under 18	233802
18–64	549321
65+	136050
Median household income	63767
Poverty rate	17.82
Homeownership rate	54.14
Unemployment rate	7.2
Median home value	249100
Gini index	0.513
Vacancy rate	10.29
White	312512
Black	482006
Asian	27121
Native	3475
Hispanic/Latino	81334
Bachelor's or higher	292293

Districts

TN-09 — 70% (congressional)
TN-08 — 30% (congressional)
TN Senate District 29 — 40% (state senate)
TN Senate District 31 — 22% (state senate)
TN Senate District 32 — 17% (state senate)
TN Senate District 33 — 11% (state senate)
TN Senate District 30 — 10% (state senate)
TN House District 86 — 29% (state house)
TN House District 99 — 21% (state house)
TN House District 95 — 11% (state house)
TN House District 85 — 5% (state house)
TN House District 88 — 5% (state house)
TN House District 97 — 4% (state house)
TN House District 83 — 4% (state house)
TN House District 84 — 4% (state house)
TN House District 96 — 4% (state house)
TN House District 98 — 4% (state house)
TN House District 91 — 4% (state house)
TN House District 87 — 3% (state house)
TN House District 93 — 3% (state house)

Source

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

4.7 KiB Raw Blame History Unescape Escape

Shelby County, TN

Demographics (ACS 2023)

Districts

Source

4.7 KiB

Raw Blame History