hasadna/open-bus-map-search

Performance | split velocity page map to tiles

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#1,315 opened on Oct 10, 2025

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enhancementfrontendhacktoberfestusabilityvelocities page

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Description

In the velocity heatmap page, we always load the velocities from the entirety of Israel 🤯 . That's a lot of data, especially when we'll support zoom levels lon_min=34.25&lon_max=35.7&lat_min=29.5&lat_max=33.33:

https://open-bus-stride-api.hasadna.org.il/siri_velocity_aggregation/siri_velocity_aggregation?recorded_from=2025-01-01T00%3A00%3A00&lon_min=34.25&lon_max=35.7&lat_min=29.5&lat_max=33.33&rounding_precision=2

I want to load the data from the backend in "tiles". If you're not familiar with the map tiles concept, you can read about it here: https://en.wikipedia.org/wiki/Tiled_web_map there's an implementation of tile fetching in the useVehicleLocation hook. If you feel it's over complicated you're probably right, and we encourage you to make something more simple

Thanks ❤️

Contributor guide

Research direction
Explore the existing tile based implementation in the useVehicleLocation hook and adapt it to load velocity heatmap data in tiles instead of loading all data at once.
Tech stack
typescriptreact
Domain
frontendperformance
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScriptReactMap Tiles
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60