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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

5.0 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

Baltimore County, MD

county

24005

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
850796	185984	510443	154369	91768	9.78	66.38	4.89	349300	0.458	5.14	447437	260785	52203	2363	66062	361826

to	rel	area_weight
us/states/md/districts/02	in-district	0.6171

to	rel	area_weight
us/states/md/districts/01	in-district	0.2142

to	rel	area_weight
us/states/md/districts/07	in-district	0.0928

to	rel	area_weight
us/states/md/districts/senate/42	in-district	0.3575

to	rel	area_weight
us/states/md/districts/senate/10	in-district	0.1474

to	rel	area_weight
us/states/md/districts/senate/7	in-district	0.1293

to	rel	area_weight
us/states/md/districts/senate/11	in-district	0.1073

to	rel	area_weight
us/states/md/districts/senate/6	in-district	0.0768

to	rel	area_weight
us/states/md/districts/senate/44	in-district	0.0434

to	rel	area_weight
us/states/md/districts/senate/8	in-district	0.0395

to	rel	area_weight
us/states/md/districts/senate/43	in-district	0.0091

to	rel	area_weight
us/states/md/districts/house/42a	in-district	0.3354

to	rel	area_weight
us/states/md/districts/house/10	in-district	0.1474

to	rel	area_weight
us/states/md/districts/house/7a	in-district	0.1291

to	rel	area_weight
us/states/md/districts/house/6	in-district	0.0768

to	rel	area_weight
us/states/md/districts/house/11b	in-district	0.0738

to	rel	area_weight
us/states/md/districts/house/8	in-district	0.0395

to	rel	area_weight
us/states/md/districts/house/11a	in-district	0.0335

to	rel	area_weight
us/states/md/districts/house/44b	in-district	0.0312

to	rel	area_weight
us/states/md/districts/house/42b	in-district	0.0221

to	rel	area_weight
us/states/md/districts/house/44a	in-district	0.0122

to	rel	area_weight
us/states/md/districts/house/43b	in-district	0.0091

field	source
demographics	Census ACS 2023

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

official

jurisdiction

county

2026-07-03

Baltimore County, MD

County jurisdiction.

Demographics (ACS 2023)

Measure	Value
Population	850796
Under 18	185984
18–64	510443
65+	154369
Median household income	91768
Poverty rate	9.78
Homeownership rate	66.38
Unemployment rate	4.89
Median home value	349300
Gini index	0.458
Vacancy rate	5.14
White	447437
Black	260785
Asian	52203
Native	2363
Hispanic/Latino	66062
Bachelor's or higher	361826

Districts

MD-02 — 62% (congressional)
MD-01 — 21% (congressional)
MD-07 — 9% (congressional)
MD Senate District 42 — 36% (state senate)
MD Senate District 10 — 15% (state senate)
MD Senate District 7 — 13% (state senate)
MD Senate District 11 — 11% (state senate)
MD Senate District 6 — 8% (state senate)
MD Senate District 44 — 4% (state senate)
MD Senate District 8 — 4% (state senate)
MD Senate District 43 — 1% (state senate)
MD House District 42A — 34% (state house)
MD House District 10 — 15% (state house)
MD House District 7A — 13% (state house)
MD House District 6 — 8% (state house)
MD House District 11B — 7% (state house)
MD House District 8 — 4% (state house)
MD House District 11A — 3% (state house)
MD House District 44B — 3% (state house)
MD House District 42B — 2% (state house)
MD House District 44A — 1% (state house)
MD House District 43B — 1% (state house)

Source

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

5.0 KiB Raw Blame History Unescape Escape

Baltimore County, MD

Demographics (ACS 2023)

Districts

Source

5.0 KiB

Raw Blame History