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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

5.6 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

Polk County, IA

county

19153

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
503175	122594	310306	70275	83576	10.31	67.35	4.35	262100	0.4372	6.01	381269	37401	25053	1562	52317	179585

to	rel	area_weight
us/states/ia/districts/03	in-district	0.9985

to	rel	area_weight
us/states/ia/districts/senate/23	in-district	0.5842

to	rel	area_weight
us/states/ia/districts/senate/20	in-district	0.1

to	rel	area_weight
us/states/ia/districts/senate/22	in-district	0.0818

to	rel	area_weight
us/states/ia/districts/senate/15	in-district	0.0671

to	rel	area_weight
us/states/ia/districts/senate/16	in-district	0.0565

to	rel	area_weight
us/states/ia/districts/senate/21	in-district	0.0518

to	rel	area_weight
us/states/ia/districts/senate/18	in-district	0.0341

to	rel	area_weight
us/states/ia/districts/senate/17	in-district	0.0245

to	rel	area_weight
us/states/ia/districts/house/45	in-district	0.5653

to	rel	area_weight
us/states/ia/districts/house/40	in-district	0.0626

to	rel	area_weight
us/states/ia/districts/house/43	in-district	0.0559

to	rel	area_weight
us/states/ia/districts/house/29	in-district	0.0395

to	rel	area_weight
us/states/ia/districts/house/31	in-district	0.0389

to	rel	area_weight
us/states/ia/districts/house/39	in-district	0.0373

to	rel	area_weight
us/states/ia/districts/house/30	in-district	0.0276

to	rel	area_weight
us/states/ia/districts/house/42	in-district	0.0267

to	rel	area_weight
us/states/ia/districts/house/44	in-district	0.026

to	rel	area_weight
us/states/ia/districts/house/41	in-district	0.025

to	rel	area_weight
us/states/ia/districts/house/36	in-district	0.0209

to	rel	area_weight
us/states/ia/districts/house/46	in-district	0.0189

to	rel	area_weight
us/states/ia/districts/house/32	in-district	0.0176

to	rel	area_weight
us/states/ia/districts/house/35	in-district	0.0132

to	rel	area_weight
us/states/ia/districts/house/33	in-district	0.013

to	rel	area_weight
us/states/ia/districts/house/34	in-district	0.0114

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Polk County, IA

County jurisdiction — 10 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	503175
Under 18	122594
18–64	310306
65+	70275
Median household income	83576
Poverty rate	10.31
Homeownership rate	67.35
Unemployment rate	4.35
Median home value	262100
Gini index	0.4372
Vacancy rate	6.01
White	381269
Black	37401
Asian	25053
Native	1562
Hispanic/Latino	52317
Bachelor's or higher	179585

Districts

IA-03 — 100% (congressional)
IA Senate District 23 — 58% (state senate)
IA Senate District 20 — 10% (state senate)
IA Senate District 22 — 8% (state senate)
IA Senate District 15 — 7% (state senate)
IA Senate District 16 — 6% (state senate)
IA Senate District 21 — 5% (state senate)
IA Senate District 18 — 3% (state senate)
IA Senate District 17 — 2% (state senate)
IA House District 45 — 57% (state house)
IA House District 40 — 6% (state house)
IA House District 43 — 6% (state house)
IA House District 29 — 4% (state house)
IA House District 31 — 4% (state house)
IA House District 39 — 4% (state house)
IA House District 30 — 3% (state house)
IA House District 42 — 3% (state house)
IA House District 44 — 3% (state house)
IA House District 41 — 2% (state house)
IA House District 36 — 2% (state house)
IA House District 46 — 2% (state house)
IA House District 32 — 2% (state house)
IA House District 35 — 1% (state house)
IA House District 33 — 1% (state house)
IA House District 34 — 1% (state house)

Source

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

5.6 KiB Raw Blame History Unescape Escape

Polk County, IA

Demographics (ACS 2023)

Districts

Source

5.6 KiB

Raw Blame History