Tiling BruitParif data with QGIS

Posted on June 29, 2019 in OpenData • 2 min read

BruitParif, the organism in charge of evaluating noise pollution in Paris area, publishes a map with measured noise levels in Paris. This map is however not reusable easily elsewhere, but they offer to download it as opendata shape files (SHP files). Let us see how to quickly export raster tiles to use with Leaflet from these shape files and QGIS.


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Cycl’Assist/Cygnal 0.4 is out!

Posted on January 22, 2019 in Dev • 2 min read

Cycl’Assist aims to be a webapp to ease tracking and reporting issues with bike infrastructures while riding your bike (any danger on the way such as holes in the ground, cars parked like sh*t, road work, etc). You can think of it as Waze for bikes :) Version 0 …


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Liste de données et documents disponibles sur Montrouge

Posted on January 22, 2019 in OpenData • 1 min read

La ville de Montrouge n’a malheureusement aucune donnée ouverte disponible. J’ai donc commencé une page pour lister toutes les données d’intérêt pour le territoire de Montrouge que j’ai pu recenser jusqu’à présent.


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Manage expiration of cached assets with Service Worker caching

Posted on January 05, 2019 in Dev • 4 min read

My Cygnal app uses OSM map tiles to render the map on which the reports are shown. It is meant to be used in realtime, on your mobile phone, mounted on your bike and there can often be some network issues in this setup.

I was looking for a way …


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Generating your own vector tiles

Posted on December 30, 2018 in Dev • 10 min read

There is a cycle-oriented OpenStreetMap render available, called OpenCycleMap. Sadly, OpenCycleMap is not really open (as in opensource) and it is not easy to report issues and get bug fixes. Moreover, you cannot selfhost it and have to pay after a given number of requests.

There were discussions recently, on #osm-fr@oftc.net and on the French OSM mailing-list about eventually having an alternative render dedicated to cycling which would be totally opensource, free software and selfhostable.


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