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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

5.2 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

Montgomery County, PA

county

42091

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
867573	184693	519774	163106	113915	6.51	71.38	4.46	436700	0.4728	4.24	633871	80978	69994	1047	58178	470135

to	rel	area_weight
us/states/pa/districts/04	in-district	0.7418

to	rel	area_weight
us/states/pa/districts/01	in-district	0.1986

to	rel	area_weight
us/states/pa/districts/05	in-district	0.0574

to	rel	area_weight
us/states/pa/districts/senate/24	in-district	0.4097

to	rel	area_weight
us/states/pa/districts/senate/12	in-district	0.2999

to	rel	area_weight
us/states/pa/districts/senate/17	in-district	0.1211

to	rel	area_weight
us/states/pa/districts/senate/44	in-district	0.0707

to	rel	area_weight
us/states/pa/districts/senate/4	in-district	0.066

to	rel	area_weight
us/states/pa/districts/senate/7	in-district	0.0324

to	rel	area_weight
us/states/pa/districts/house/147	in-district	0.1953

to	rel	area_weight
us/states/pa/districts/house/70	in-district	0.1006

to	rel	area_weight
us/states/pa/districts/house/131	in-district	0.0942

to	rel	area_weight
us/states/pa/districts/house/150	in-district	0.0813

to	rel	area_weight
us/states/pa/districts/house/146	in-district	0.0798

to	rel	area_weight
us/states/pa/districts/house/61	in-district	0.076

to	rel	area_weight
us/states/pa/districts/house/151	in-district	0.0652

to	rel	area_weight
us/states/pa/districts/house/148	in-district	0.0614

to	rel	area_weight
us/states/pa/districts/house/149	in-district	0.0574

to	rel	area_weight
us/states/pa/districts/house/53	in-district	0.0439

to	rel	area_weight
us/states/pa/districts/house/152	in-district	0.0423

to	rel	area_weight
us/states/pa/districts/house/153	in-district	0.042

to	rel	area_weight
us/states/pa/districts/house/154	in-district	0.0335

to	rel	area_weight
us/states/pa/districts/house/54	in-district	0.0269

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Montgomery County, PA

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	867573
Under 18	184693
18–64	519774
65+	163106
Median household income	113915
Poverty rate	6.51
Homeownership rate	71.38
Unemployment rate	4.46
Median home value	436700
Gini index	0.4728
Vacancy rate	4.24
White	633871
Black	80978
Asian	69994
Native	1047
Hispanic/Latino	58178
Bachelor's or higher	470135

Districts

PA-04 — 74% (congressional)
PA-01 — 20% (congressional)
PA-05 — 6% (congressional)
PA Senate District 24 — 41% (state senate)
PA Senate District 12 — 30% (state senate)
PA Senate District 17 — 12% (state senate)
PA Senate District 44 — 7% (state senate)
PA Senate District 4 — 7% (state senate)
PA Senate District 7 — 3% (state senate)
PA House District 147 — 20% (state house)
PA House District 70 — 10% (state house)
PA House District 131 — 9% (state house)
PA House District 150 — 8% (state house)
PA House District 146 — 8% (state house)
PA House District 61 — 8% (state house)
PA House District 151 — 7% (state house)
PA House District 148 — 6% (state house)
PA House District 149 — 6% (state house)
PA House District 53 — 4% (state house)
PA House District 152 — 4% (state house)
PA House District 153 — 4% (state house)
PA House District 154 — 3% (state house)
PA House District 54 — 3% (state house)

Source

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

5.2 KiB Raw Blame History Unescape Escape

Montgomery County, PA

Demographics (ACS 2023)

Districts

Source

5.2 KiB

Raw Blame History