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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

4.0 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

San Bernardino County, CA

county

06071

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
2197104	560378	1359742	276984	85478	13.35	62.06	7.11	505000	0.4384	9.27	723531	172075	183934	31223	1213014	450344

to	rel	area_weight
us/states/ca/districts/23	in-district	0.8428

to	rel	area_weight
us/states/ca/districts/25	in-district	0.1288

to	rel	area_weight
us/states/ca/districts/28	in-district	0.0099

to	rel	area_weight
us/states/ca/districts/33	in-district	0.0094

to	rel	area_weight
us/states/ca/districts/35	in-district	0.0071

to	rel	area_weight
us/states/ca/districts/senate/19	in-district	0.8155

to	rel	area_weight
us/states/ca/districts/senate/18	in-district	0.1288

to	rel	area_weight
us/states/ca/districts/senate/23	in-district	0.0322

to	rel	area_weight
us/states/ca/districts/senate/29	in-district	0.012

to	rel	area_weight
us/states/ca/districts/house/34	in-district	0.792

to	rel	area_weight
us/states/ca/districts/house/36	in-district	0.1288

to	rel	area_weight
us/states/ca/districts/house/47	in-district	0.025

to	rel	area_weight
us/states/ca/districts/house/39	in-district	0.0181

to	rel	area_weight
us/states/ca/districts/house/41	in-district	0.0162

to	rel	area_weight
us/states/ca/districts/house/45	in-district	0.0073

to	rel	area_weight
us/states/ca/districts/house/50	in-district	0.0059

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

San Bernardino County, CA

County jurisdiction — 10 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	2197104
Under 18	560378
18–64	1359742
65+	276984
Median household income	85478
Poverty rate	13.35
Homeownership rate	62.06
Unemployment rate	7.11
Median home value	505000
Gini index	0.4384
Vacancy rate	9.27
White	723531
Black	172075
Asian	183934
Native	31223
Hispanic/Latino	1213014
Bachelor's or higher	450344

Districts

CA-23 — 84% (congressional)
CA-25 — 13% (congressional)
CA-28 — 1% (congressional)
CA-33 — 1% (congressional)
CA-35 — 1% (congressional)
CA Senate District 19 — 82% (state senate)
CA Senate District 18 — 13% (state senate)
CA Senate District 23 — 3% (state senate)
CA Senate District 29 — 1% (state senate)
CA House District 34 — 79% (state house)
CA House District 36 — 13% (state house)
CA House District 47 — 2% (state house)
CA House District 39 — 2% (state house)
CA House District 41 — 2% (state house)
CA House District 45 — 1% (state house)
CA House District 50 — 1% (state house)

Source

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

4.0 KiB Raw Blame History Unescape Escape

San Bernardino County, CA

Demographics (ACS 2023)

Districts

Source

4.0 KiB

Raw Blame History