Project ideas from Hacker News discussions.

What's Under Your Feet in New York City?

📝 Discussion Summary (Click to expand)

1. Eruv & religious‑law boundary disputes

“AFAIK the eruvim are not dictated by ‘high courts’ … they are constructed and maintained by various Orthodox groups.” — woodruffw
“I live in NYC … couldn’t believe they would come up with such elaborate hacks just to ‘technically’ still be following their religious laws!” — radicality
“following the law of the highest of high courts to the letter.” — dataviz1000

2. NYC underground infrastructure & data visualisation

“This is quite informative … anyone know if such data is or will be public, like on data.ny.gov?” — radicality
“I so hoped it would come with an infographic of NY’s underworld, slice of cake style.” — theletterf
“I thought I knew NYC infra fairly well, but I learned so much … like how NYC’s electric grid is actually a grid and more fault tolerant.” — programmertote

3. The tunnel incident & its legal/ conspiracy fallout

“Religious infighting with 2 fundamentalist sects … boiled down to some people digging a tunnel connecting 2 buildings because of… reasons?” — cogman10
“The story ends with: four defendants refused to accept a plea deal and were set to be tried in April 2025.” — masfuerte
“still‑s taken from videos … fueled antisemitic conspiracy theories … undermining online speculation.” — radicality (quoting the discussion of the tunnel case)


🚀 Project Ideas

EruvMap: Interactive Eruv Boundary Tracker

Summary

  • Interactive map of NYC eruv boundaries, status, and legal constraints.
  • Consolidates scattered sources into a single, reliable, updatable resource.

Details

Key Value
Target Audience Orthodox Jews, urban planners, community leaders, developers
Core Feature Live boundary map with status‑page integration, historical layers, address search
Tech Stack React + Mapbox front‑end, Node.js backend, PostgreSQL, OpenStreetMap data
Difficulty Medium
Monetization Revenue-ready: freemium subscription for premium layers

Notes

  • HN commenters cite confusion over eruv ownership and the need for clear, authoritative maps (e.g., woodruffw, radicality).
  • Potential for reducing misinformation and enabling better community planning discussions.

UndergroundNYC: 3D Infrastructure Explorer

Summary

  • Public 3D visualizer of NYC underground utilities, tunnels, and construction data.
  • Merges open data from multiple city sources into an intuitive, searchable interface.

Details

Key Value
Target Audience NYC residents, civil engineers, students, researchers
Core Feature Interactive 3D globe, layered utilities, searchable datasets, downloadable archives
Tech Stack Three.js/WebGL front‑end, Python (Django) API, PostgreSQL/PostGIS, data from data.ny.gov
Difficulty High
Monetization Revenue-ready: sponsorship / API usage fees

Notes

  • Users express desire for a “slice‑of‑cake” style 3D visualization of the city’s underworld (theletterf, radicality).
  • Could empower citizens and professionals to understand repair needs and safety implications.

CaseTrackNYC: Legal Infrastructure Issue Tracker

Summary

  • Aggregates updates on high‑profile NYC infrastructure legal cases (e.g., tunnel, eruv disputes).
  • Provides alerts, timeline summaries, and plain‑language analyses.

Details

Key Value
Target Audience Citizens, journalists, policy analysts, legal observers
Core Feature Dashboard with case status, plea‑deal changes, court rulings, source links, notification alerts
Tech Stack Ruby on Rails full‑stack, Elasticsearch, React front‑end, webhook scrapers for court dockets
Difficulty Medium
Monetization Hobby

Notes

  • Frustration over missing post‑plea‑deal outcomes (mike_hock) and demand for reliable case tracking (radicality).
  • Opportunity to fill the information gap, spark informed discussion, and serve as a public resource for infrastructure legal matters.

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