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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

Berks County, PA

county

42011

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
433015	95140	259775	78100	79777	12.23	71.27	5.43	257300	0.4455	4.86	301447	19969	5859	2854	107531	112321

to	rel	area_weight
us/states/pa/districts/04	in-district	0.4302

to	rel	area_weight
us/states/pa/districts/09	in-district	0.3668

to	rel	area_weight
us/states/pa/districts/06	in-district	0.2029

to	rel	area_weight
us/states/pa/districts/senate/48	in-district	0.4834

to	rel	area_weight
us/states/pa/districts/senate/11	in-district	0.2367

to	rel	area_weight
us/states/pa/districts/senate/24	in-district	0.1741

to	rel	area_weight
us/states/pa/districts/senate/13	in-district	0.0767

to	rel	area_weight
us/states/pa/districts/senate/44	in-district	0.029

to	rel	area_weight
us/states/pa/districts/house/5	in-district	0.2896

to	rel	area_weight
us/states/pa/districts/house/130	in-district	0.242

to	rel	area_weight
us/states/pa/districts/house/124	in-district	0.2131

to	rel	area_weight
us/states/pa/districts/house/128	in-district	0.1607

to	rel	area_weight
us/states/pa/districts/house/99	in-district	0.0406

to	rel	area_weight
us/states/pa/districts/house/126	in-district	0.0305

to	rel	area_weight
us/states/pa/districts/house/129	in-district	0.0149

to	rel	area_weight
us/states/pa/districts/house/127	in-district	0.0085

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Berks County, PA

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	433015
Under 18	95140
18–64	259775
65+	78100
Median household income	79777
Poverty rate	12.23
Homeownership rate	71.27
Unemployment rate	5.43
Median home value	257300
Gini index	0.4455
Vacancy rate	4.86
White	301447
Black	19969
Asian	5859
Native	2854
Hispanic/Latino	107531
Bachelor's or higher	112321

Districts

PA-04 — 43% (congressional)
PA-09 — 37% (congressional)
PA-06 — 20% (congressional)
PA Senate District 48 — 48% (state senate)
PA Senate District 11 — 24% (state senate)
PA Senate District 24 — 17% (state senate)
PA Senate District 13 — 8% (state senate)
PA Senate District 44 — 3% (state senate)
PA House District 5 — 29% (state house)
PA House District 130 — 24% (state house)
PA House District 124 — 21% (state house)
PA House District 128 — 16% (state house)
PA House District 99 — 4% (state house)
PA House District 126 — 3% (state house)
PA House District 129 — 1% (state house)
PA House District 127 — 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

Berks County, PA

Demographics (ACS 2023)

Districts

Source

4.0 KiB

Raw Blame History