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republic-os/data/jurisdictions/us/states/ca/counties/santa-clara/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

3.5 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 Santa Clara County, CA county 06085 CA
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
1902047 390076 1229961 282010 164281 7.11 55.08 4.87 1490600 0.4764 5.65 568135 43917 770311 16500 475827 1142708
to rel area_weight
us/states/ca/districts/18 in-district 0.5755
to rel area_weight
us/states/ca/districts/19 in-district 0.1748
to rel area_weight
us/states/ca/districts/16 in-district 0.1461
to rel area_weight
us/states/ca/districts/17 in-district 0.0977
to rel area_weight
us/states/ca/districts/senate/15 in-district 0.8029
to rel area_weight
us/states/ca/districts/senate/13 in-district 0.1121
to rel area_weight
us/states/ca/districts/senate/10 in-district 0.0817
to rel area_weight
us/states/ca/districts/house/25 in-district 0.5376
to rel area_weight
us/states/ca/districts/house/28 in-district 0.1973
to rel area_weight
us/states/ca/districts/house/23 in-district 0.0953
to rel area_weight
us/states/ca/districts/house/29 in-district 0.0688
to rel area_weight
us/states/ca/districts/house/26 in-district 0.0629
to rel area_weight
us/states/ca/districts/house/24 in-district 0.035
field source
demographics Census ACS 2023
field source
districts PostGIS area-intersection over Census TIGER 2024 boundaries
official
jurisdiction
county
ca
2026-07-03

Santa Clara County, CA

County jurisdiction — 5 officeholders mapped.

Demographics (ACS 2023)

Measure Value
Population 1902047
Under 18 390076
1864 1229961
65+ 282010
Median household income 164281
Poverty rate 7.11
Homeownership rate 55.08
Unemployment rate 4.87
Median home value 1490600
Gini index 0.4764
Vacancy rate 5.65
White 568135
Black 43917
Asian 770311
Native 16500
Hispanic/Latino 475827
Bachelor's or higher 1142708

Districts

Source

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