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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

4.3 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

Delaware County, PA

county

42045

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
579222	127583	350673	100966	89546	10.17	69.61	6.86	332200	0.4884	5.56	366265	128315	36677	417	29222	238471

to	rel	area_weight
us/states/pa/districts/05	in-district	0.9933

to	rel	area_weight
us/states/pa/districts/06	in-district	0.0058

to	rel	area_weight
us/states/pa/districts/senate/9	in-district	0.5036

to	rel	area_weight
us/states/pa/districts/senate/26	in-district	0.2835

to	rel	area_weight
us/states/pa/districts/senate/17	in-district	0.1247

to	rel	area_weight
us/states/pa/districts/senate/8	in-district	0.0878

to	rel	area_weight
us/states/pa/districts/house/168	in-district	0.2261

to	rel	area_weight
us/states/pa/districts/house/160	in-district	0.206

to	rel	area_weight
us/states/pa/districts/house/165	in-district	0.1138

to	rel	area_weight
us/states/pa/districts/house/161	in-district	0.1093

to	rel	area_weight
us/states/pa/districts/house/159	in-district	0.0969

to	rel	area_weight
us/states/pa/districts/house/166	in-district	0.0707

to	rel	area_weight
us/states/pa/districts/house/162	in-district	0.0541

to	rel	area_weight
us/states/pa/districts/house/185	in-district	0.0473

to	rel	area_weight
us/states/pa/districts/house/163	in-district	0.0383

to	rel	area_weight
us/states/pa/districts/house/164	in-district	0.0243

to	rel	area_weight
us/states/pa/districts/house/191	in-district	0.0129

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Delaware County, PA

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure	Value
Population	579222
Under 18	127583
18–64	350673
65+	100966
Median household income	89546
Poverty rate	10.17
Homeownership rate	69.61
Unemployment rate	6.86
Median home value	332200
Gini index	0.4884
Vacancy rate	5.56
White	366265
Black	128315
Asian	36677
Native	417
Hispanic/Latino	29222
Bachelor's or higher	238471

Districts

PA-05 — 99% (congressional)
PA-06 — 1% (congressional)
PA Senate District 9 — 50% (state senate)
PA Senate District 26 — 28% (state senate)
PA Senate District 17 — 12% (state senate)
PA Senate District 8 — 9% (state senate)
PA House District 168 — 23% (state house)
PA House District 160 — 21% (state house)
PA House District 165 — 11% (state house)
PA House District 161 — 11% (state house)
PA House District 159 — 10% (state house)
PA House District 166 — 7% (state house)
PA House District 162 — 5% (state house)
PA House District 185 — 5% (state house)
PA House District 163 — 4% (state house)
PA House District 164 — 2% (state house)
PA House District 191 — 1% (state house)

Source

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

4.3 KiB Raw Blame History Unescape Escape

Delaware County, PA

Demographics (ACS 2023)

Districts

Source

4.3 KiB

Raw Blame History