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republic-os/data/jurisdictions/us/states/mi/counties/mackinac/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 Mackinac County, MI county 26097 MI
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
10957 1641 6061 3255 63909 16.05 77.88 7.97 174500 0.4472 50.94 7852 525 67 1502 247 2978
to rel area_weight
us/states/mi/districts/01 in-district 0.5199
to rel area_weight
us/states/mi/districts/senate/37 in-district 0.2672
to rel area_weight
us/states/mi/districts/senate/38 in-district 0.2451
to rel area_weight
us/states/mi/districts/house/107 in-district 0.2672
to rel area_weight
us/states/mi/districts/house/108 in-district 0.2452
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
mi
2026-07-03

Mackinac County, MI

County jurisdiction — 1 officeholders mapped.

Demographics (ACS 2023)

Measure Value
Population 10957
Under 18 1641
1864 6061
65+ 3255
Median household income 63909
Poverty rate 16.05
Homeownership rate 77.88
Unemployment rate 7.97
Median home value 174500
Gini index 0.4472
Vacancy rate 50.94
White 7852
Black 525
Asian 67
Native 1502
Hispanic/Latino 247
Bachelor's or higher 2978

Districts

Source

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