Sylvain Lesage

@severo
405 Followers
267 Following
921 Posts
Dataviz developer ✧ Freelance | Open for projects
websitehttps://rednegra.net
huggingfacehttps://huggingface.co/severo
githubhttps://github.com/severo
openstreetmaphttps://www.openstreetmap.org/user/Sylvain%20Lesage

#OGC Features and Geometries JSON (JSON-FG) Standard is published

it extends #GeoJSON with additional support for:
- coordinate reference systems
- schema for datatypes
- geometry types for 3D and more
- ...

https://www.ogc.org/announcement/ogc-releases-the-features-and-geometries-json-json-fg-standard/

OGC Releases JSON-FG Standard for GeoJSON Extensions

OGC releases the JSON-FG Standard, extending GeoJSON with CRS support, temporal data, advanced geometries, and interoperability features.

Open Geospatial Consortium
OGC GeoParquet best practices: The OGC offers a best practices guide for distributing #GeoParquet files, covering compression, spatial indexing and ordering, row group sizes, partitioning, and metadata. The guide also lists concrete commands for common tools so you can produce...
https://spatialists.ch/posts/2026/05/22-ogc-geoparquet-best-practices/ #GIS #GISchat #geospatial #SwissGIS
OGC GeoParquet best practices – Spatialists – geospatial news

The OGC offers a best practices guide for distributing #GeoParquet files, covering compression, spatial indexing and ordering, row group sizes, partitioning, and metadata. The guide also lists concrete commands for common tools so you can produce optimally distributed files right away.

Spatialists – geospatial news

@cartes_app is already 100% available in English, French and Spanish.

80% for German and Britton.

20% for Italian, Occitan and Catalan.

Estonian support just started yesterday.

Do you want to contribute? Join us at:

https://translate.codeberg.org/projects/cartes/web/messages/

cartes.app/web/messages

cartes.app is being translated into 9 languages using Weblate. Join the translation or start translating your own project.

Codeberg Translate
The @panoramax project created a AI model that recognizes German Traffic Signs on Street Level Imagery https://huggingface.co/Panoramax/classify_de_road_signs. Now we "just" need a German #Panoramax Instance https://www.osm-verkehrswende.org/root/posts/panoramax-bedarf/ to get this data into a Pipeline that helps keep OSM updated (like this https://radinfra.de/posts/2025-verkehrszeichen/).
Panoramax/classify_de_road_signs · Hugging Face

We’re on a journey to advance and democratize artificial intelligence through open source and open science.

Ca fait 4 mois que je la prépare avec @ClaireLemoine, notre SARL nommée #TamiaData est enfin officiellement créée.
Nous allons pouvoir faire de l'#opendata pour les collectivités territoriales et les former à la contribution aux communs numériques. On commence avec quelques mairies en #Essonne et on va étendre au fur et à mesure notre champ d'action.
Souhaitez nous bonne chance, et on pourra salarier des gens

Https://tamiadata.com

#administration #datagouv #formation #réutilisation #openstreetmap #panoramax

Tamia Data – Connaissance des territoires et décarbonation

Solutions de connaissance des territoires et de décarbonation, construites sur des logiciels libres et des données ouvertes.

For any #DataViz people into #Procycling

(Posted by ‪ammattipyöräily on bsky)

#Giro

Our new contributor severo just set up a translation dashboard on Codeberg's translate tool. Thanks Sylvain !

You can track how well https://cartes.app is translated and you can help do the translations in your native language(s).

https://translate.codeberg.org/projects/cartes/web/

We’re excited to release the first version of our (Geo)Parquet Viewer. It supports both GeoParquet and regular Parquet files.

The project builds on top of excellent open-source work from projects like DuckDB, deck.gl, Apache Arrow, and others, and we hope we’ve created a useful tool for the initial exploration of Parquet datasets.

Saidy Barry has been hammering away on this and is looking forward to your feedback and ideas for improvements.

Try it today at https://geoparquet.info

GeoParquet Viewer

👋 I'm looking for new projects!

I'm a senior web developer with a background in data science, data visualization, and software engineering.

I love creating data-driven applications, interactive visualizations, and advanced graphical tools.

I'm mainly looking for freelance missions.

Keywords: #data, #dataviz, #geospatial, #software, #web

Portfolio: https://rednegra.net/works
Resume: https://rednegra.net/resume

Boosts are appreciated!

Works portfolio — Sylvain Lesage

Sylvain Lesage - blog, resume and projects.