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source: projects/meridian-way/
generated: 2026-06-08T06:56:33.028Z
note: This is a markdown version optimized for LLMs. For the full experience, visit the HTML version.
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Paul Lahana's Portfolio  

A markdown version of this page optimized for LLMs is available at: [https://dev.paul-lahana.com/projects/meridian-way/index.md](https://dev.paul-lahana.com/projects/meridian-way/index.md)

# [Paul Lahana](/)

[![Paul Lahana](/_astro/smiley.aUVAx_wu.png)](/drawing-board)

-   [About](/about)

[](/)

## MeridianWay

open source projectAstroOpenStreetMapLeaflet

[MeridianWay](https://github.com/paultursuru/meridian) [MeridianWay](https://meridian-way.ch)

MeridianWay calculates two pedestrian routes between any two points: one maximizing sun exposure, one minimizing it.

The app computes real-time solar position and projects building shadows using OpenStreetMap's crowdsourced building height data.

Results depend on OSM coverage — some shadier paths may go undetected where height data is incomplete. Treat routes as suggestions.

![Two screenshots of MeridianWay on a smartphone showing pedestrian routes : one sun-maximized, one shade-maximized, overlaid on a city map.](/_astro/meridian-way.CveTR5gk_Z1a7szl.webp)![A screenshot of MeridianWay on desktop showing the route selection interface with sun and shade options.](/_astro/meridian-way-2.DfarUE0B_Z1YsqwG.webp)