Mapping the most convenient ways to meet someone with public transit
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Hello!I built a map that generates a heatmap of the most convenient meeting spots between several people, based on public transit travel times.Move the markers anywhere in the map; all cities with sufficient transit data are supported!
HN · launched Mar 24, 2026 · 16 upvotes (top 30%) · 0 views
Niche: specialized navigation and tracking apps · 203 launches, 35 in the last 7 days ▲ +84% · Explore this niche →
Category and tags
- Travel & hospitality
- Search & retrieval
- B2C
- Not AI
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 203 launches in specialized navigation and tracking apps →
Could you build this?
Partial While rendering maps and heatmaps in frontend libraries is simple, computing multi-origin isochrones across real-world transit networks requires high-performance routing engines and heavy GTFS data processing.
What it would actually take: The stack would involve Leaflet/Mapbox on the frontend with a specialized transit routing backend like OpenTripPlanner, Valhalla, or custom RAPTOR implementations. Generating multi-origin heatmaps involves computing many-to-many travel times over full GTFS schedules, which quickly creates combinatorial scaling issues without efficient graph algorithms. Processing and caching national/global GTFS datasets in memory requires transit data pipeline engineering.
Discussion
2 comments analyzed.
Concerns raised: Infinite loading when insufficient data coverage, Limited transit data availability in some regions
Feature requests: Add warning when area lacks sufficient routing data
Competitors
Other products that read as similar to this one : 142 launches clear the similarity bar, closest 8 shown.
Attention rank: #52 of 143 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 103 days after the earliest competitor.
- Plan trips across the U.S. using only local public transit · hn · 2026-10-08 · 6 upvotes · similarity 0.47
- TapMap · ph · 2026-11-02 · 1 upvotes · similarity 0.47
- Public transit systems as data · hn · 2026-03-29 · 47 upvotes · similarity 0.45
- FindOurDate · ph · 2026-09-26 · 2 upvotes · similarity 0.41
- I built Istanbul live transit map · hn · 2026-05-20 · 11 upvotes · similarity 0.41
- Transit · ph · 2026-10-22 · 2 upvotes · similarity 0.39
- Streeboard - Smart travel routes builder · ph · 2026-09-07 · 1 upvotes · similarity 0.38
- Metro Maneuver · ph · 2026-10-29 · 1 upvotes · similarity 0.38
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