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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

4.2 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

Anne Arundel County, MD

county

24003

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
598166	133881	369399	94886	124911	5.64	75.13	3.72	467900	0.4179	4.87	379136	107044	25238	3261	62581	275283

to	rel	area_weight
us/states/md/districts/03	in-district	0.4033

to	rel	area_weight
us/states/md/districts/05	in-district	0.369

to	rel	area_weight
us/states/md/districts/senate/30	in-district	0.2636

to	rel	area_weight
us/states/md/districts/senate/33	in-district	0.1924

to	rel	area_weight
us/states/md/districts/senate/31	in-district	0.1372

to	rel	area_weight
us/states/md/districts/senate/32	in-district	0.0919

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

to	rel	area_weight
us/states/md/districts/senate/12	in-district	0.0276

to	rel	area_weight
us/states/md/districts/house/30b	in-district	0.192

to	rel	area_weight
us/states/md/districts/house/31	in-district	0.1372

to	rel	area_weight
us/states/md/districts/house/33b	in-district	0.127

to	rel	area_weight
us/states/md/districts/house/32	in-district	0.0919

to	rel	area_weight
us/states/md/districts/house/30a	in-district	0.0716

to	rel	area_weight
us/states/md/districts/house/21	in-district	0.0518

to	rel	area_weight
us/states/md/districts/house/33c	in-district	0.0438

to	rel	area_weight
us/states/md/districts/house/12b	in-district	0.0276

to	rel	area_weight
us/states/md/districts/house/33a	in-district	0.0216

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Anne Arundel County, MD

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	598166
Under 18	133881
18–64	369399
65+	94886
Median household income	124911
Poverty rate	5.64
Homeownership rate	75.13
Unemployment rate	3.72
Median home value	467900
Gini index	0.4179
Vacancy rate	4.87
White	379136
Black	107044
Asian	25238
Native	3261
Hispanic/Latino	62581
Bachelor's or higher	275283

Districts

MD-03 — 40% (congressional)
MD-05 — 37% (congressional)
MD Senate District 30 — 26% (state senate)
MD Senate District 33 — 19% (state senate)
MD Senate District 31 — 14% (state senate)
MD Senate District 32 — 9% (state senate)
MD Senate District 21 — 5% (state senate)
MD Senate District 12 — 3% (state senate)
MD House District 30B — 19% (state house)
MD House District 31 — 14% (state house)
MD House District 33B — 13% (state house)
MD House District 32 — 9% (state house)
MD House District 30A — 7% (state house)
MD House District 21 — 5% (state house)
MD House District 33C — 4% (state house)
MD House District 12B — 3% (state house)
MD House District 33A — 2% (state house)

Source

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

4.2 KiB Raw Blame History Unescape Escape

Anne Arundel County, MD

Demographics (ACS 2023)

Districts

Source

4.2 KiB

Raw Blame History