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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

5.5 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

Cobb County, GA

county

13067

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
775208	174967	494423	105818	102738	8.74	67.02	4.53	407200	0.4464	5.85	379724	207116	42571	3827	116854	369718

to	rel	area_weight
us/states/ga/districts/11	in-district	0.416

to	rel	area_weight
us/states/ga/districts/06	in-district	0.3471

to	rel	area_weight
us/states/ga/districts/14	in-district	0.236

to	rel	area_weight
us/states/ga/districts/senate/37	in-district	0.3135

to	rel	area_weight
us/states/ga/districts/senate/33	in-district	0.2277

to	rel	area_weight
us/states/ga/districts/senate/28	in-district	0.1419

to	rel	area_weight
us/states/ga/districts/senate/32	in-district	0.1188

to	rel	area_weight
us/states/ga/districts/senate/56	in-district	0.1091

to	rel	area_weight
us/states/ga/districts/senate/35	in-district	0.0888

to	rel	area_weight
us/states/ga/districts/house/36	in-district	0.1196

to	rel	area_weight
us/states/ga/districts/house/38	in-district	0.114

to	rel	area_weight
us/states/ga/districts/house/34	in-district	0.1079

to	rel	area_weight
us/states/ga/districts/house/39	in-district	0.0845

to	rel	area_weight
us/states/ga/districts/house/45	in-district	0.074

to	rel	area_weight
us/states/ga/districts/house/37	in-district	0.0658

to	rel	area_weight
us/states/ga/districts/house/35	in-district	0.0647

to	rel	area_weight
us/states/ga/districts/house/42	in-district	0.0573

to	rel	area_weight
us/states/ga/districts/house/41	in-district	0.0562

to	rel	area_weight
us/states/ga/districts/house/46	in-district	0.0519

to	rel	area_weight
us/states/ga/districts/house/43	in-district	0.0495

to	rel	area_weight
us/states/ga/districts/house/44	in-district	0.0483

to	rel	area_weight
us/states/ga/districts/house/61	in-district	0.0362

to	rel	area_weight
us/states/ga/districts/house/19	in-district	0.0323

to	rel	area_weight
us/states/ga/districts/house/22	in-district	0.0267

to	rel	area_weight
us/states/ga/districts/house/60	in-district	0.0108

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Cobb County, GA

County jurisdiction — 5 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	775208
Under 18	174967
18–64	494423
65+	105818
Median household income	102738
Poverty rate	8.74
Homeownership rate	67.02
Unemployment rate	4.53
Median home value	407200
Gini index	0.4464
Vacancy rate	5.85
White	379724
Black	207116
Asian	42571
Native	3827
Hispanic/Latino	116854
Bachelor's or higher	369718

Districts

GA-11 — 42% (congressional)
GA-06 — 35% (congressional)
GA-14 — 24% (congressional)
GA Senate District 37 — 31% (state senate)
GA Senate District 33 — 23% (state senate)
GA Senate District 28 — 14% (state senate)
GA Senate District 32 — 12% (state senate)
GA Senate District 56 — 11% (state senate)
GA Senate District 35 — 9% (state senate)
GA House District 36 — 12% (state house)
GA House District 38 — 11% (state house)
GA House District 34 — 11% (state house)
GA House District 39 — 8% (state house)
GA House District 45 — 7% (state house)
GA House District 37 — 7% (state house)
GA House District 35 — 6% (state house)
GA House District 42 — 6% (state house)
GA House District 41 — 6% (state house)
GA House District 46 — 5% (state house)
GA House District 43 — 5% (state house)
GA House District 44 — 5% (state house)
GA House District 61 — 4% (state house)
GA House District 19 — 3% (state house)
GA House District 22 — 3% (state house)
GA House District 60 — 1% (state house)

Source

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

5.5 KiB Raw Blame History Unescape Escape

Cobb County, GA

Demographics (ACS 2023)

Districts

Source

5.5 KiB

Raw Blame History