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republic-os/data/jurisdictions/us/states/md/counties/st-mary-s/index.md
T
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

2.2 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 St. Mary's County, MD county 24037 MD
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
115126 27549 71433 16144 119446 7.98 73.17 3.56 407600 0.4087 8.51 82070 16847 3062 130 7072 40882
to rel area_weight
us/states/md/districts/05 in-district 0.5304
to rel area_weight
us/states/md/districts/senate/29 in-district 0.5266
to rel area_weight
us/states/md/districts/house/29a in-district 0.2804
to rel area_weight
us/states/md/districts/house/29c in-district 0.1296
to rel area_weight
us/states/md/districts/house/29b in-district 0.1166
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
md
2026-07-03

St. Mary's County, MD

County jurisdiction.

Demographics (ACS 2023)

Measure Value
Population 115126
Under 18 27549
1864 71433
65+ 16144
Median household income 119446
Poverty rate 7.98
Homeownership rate 73.17
Unemployment rate 3.56
Median home value 407600
Gini index 0.4087
Vacancy rate 8.51
White 82070
Black 16847
Asian 3062
Native 130
Hispanic/Latino 7072
Bachelor's or higher 40882

Districts

Source

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