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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

Scott County, IA

county

19163

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
174608	40411	103580	30617	78277	11.5	69.98	3.65	222000	0.4523	6.88	138119	12617	4993	332	12902	60383

to	rel	area_weight
us/states/ia/districts/01	in-district	0.9999

to	rel	area_weight
us/states/ia/districts/senate/41	in-district	0.3698

to	rel	area_weight
us/states/ia/districts/senate/35	in-district	0.3159

to	rel	area_weight
us/states/ia/districts/senate/47	in-district	0.208

to	rel	area_weight
us/states/ia/districts/senate/49	in-district	0.1062

to	rel	area_weight
us/states/ia/districts/house/82	in-district	0.3035

to	rel	area_weight
us/states/ia/districts/house/94	in-district	0.1441

to	rel	area_weight
us/states/ia/districts/house/98	in-district	0.0867

to	rel	area_weight
us/states/ia/districts/house/81	in-district	0.0663

to	rel	area_weight
us/states/ia/districts/house/93	in-district	0.064

to	rel	area_weight
us/states/ia/districts/house/97	in-district	0.0195

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Scott County, IA

County jurisdiction — 7 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	174608
Under 18	40411
18–64	103580
65+	30617
Median household income	78277
Poverty rate	11.5
Homeownership rate	69.98
Unemployment rate	3.65
Median home value	222000
Gini index	0.4523
Vacancy rate	6.88
White	138119
Black	12617
Asian	4993
Native	332
Hispanic/Latino	12902
Bachelor's or higher	60383

Districts

IA-01 — 100% (congressional)
IA Senate District 41 — 37% (state senate)
IA Senate District 35 — 32% (state senate)
IA Senate District 47 — 21% (state senate)
IA Senate District 49 — 11% (state senate)
IA House District 82 — 30% (state house)
IA House District 94 — 14% (state house)
IA House District 98 — 9% (state house)
IA House District 81 — 7% (state house)
IA House District 93 — 6% (state house)
IA House District 97 — 2% (state house)

Source

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

3.2 KiB Raw Blame History Unescape Escape

Scott County, IA

Demographics (ACS 2023)

Districts

Source

3.2 KiB

Raw Blame History