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Nice routing algorithm you got, but have you considered I got a map, a vague sense of direction and impeccible luck.

Bin wieder Zuhause mit einer Totalwartezeit von 11 Minuten bei 4 mal umsteigen und bin mit meiner improvisieren Route mit Bus praktisch direkt vor meiner Haustür gelandet. Vielleicht wär mein weg noch schneller gewesen wenn ich statt StreetComplete und Bauchgefühl OSMand verwendet hätte aber guess I dont need to use the data, I just contribute to it…

Mein erstes mal OSM/FOSSGIS Stammtisch Berlin heute war super, bin ab sofort öfter dabei.

(Sorry fürs Denglish)


Contributing commercial vehicle GPS traces from Kerala — a routing approach


I’ve been working on a method to convert commercial vehicle telematics data into useful GPX traces for OSM contribution in Kerala.

The problem


Telematics data is segment-based — each record has a start coordinate, end coordinate, timestamp and distance, but no continuous GPS track in between. Uploading these directly produces straight lines which aren’t useful for mapping.

The solution


I set up a local OSRM instance using the Kerala road extract from Geofabrik, then route-matched each segment to the actual road network. This produces GPX traces with thousands of road-following points instead of straight lines.

Results


From two months of data covering Thrissur, Irinjalakuda, Chalakudy, Kodungallur and surrounding areas:
  • 141 road-snapped segments uploaded as GPX traces
  • 19 high-priority segments flagged as possible unmapped roads
  • These will be cross-checked against aerial imagery in JOSM

Next steps


Reviewing the unmapped road candidates in JOSM against Bing aerial imagery. More vehicle data from the same region will be processed and contributed regularly.

If anyone in the Kerala OSM community has experience with similar data or wants to collaborate on reviewing unmapped road candidates, feel free to reach out.
Tools used: Python, OSRM (self-hosted), gpxpy




Rocinante the Bold — Trusty Steed – Trusty steed, reluctant adventurer, and occasional windmill skeptic. Carrying dreamers across La Mancha since the 1600s. Slow but steady. I'll get you there eventually. 🐴


























The Catternet Chronicles – A satirical news universe where cats report on human chaos like it’s breaking news.



Yesterday I cleaned up some map data by removing unnecessary email and unrelated details from several objects. I am learning and trying to follow proper OpenStreetMap mapping guidelines.







My name is Chukwuemeka Emmanuel Nwosu, a 300-level student of the Department of Geography and Environmental Management, University of Port Harcourt. This diary documents my Industrial Training (I.T.) programme as I undergo it.

After careful thought, deliberation, and counsel from my mentor and my brother, I decided to carry out my I.T. programme at the Mapathon Center of the Unique Mappers Team, University of Port Harcourt. I officially resumed on Tuesday, the 11th of May 2026.

On my first day at the Mapathon Center, I had the pleasure of meeting several interesting individuals who, like me, were present for their Industrial Training. Among them were Matel, who serves as our I.T. representative, and Wisdom, both students from the Department of Geology, Rivers State University, and two of my coursemates from the Department of Geography and Environmental Management: Rania and Obasi Emmanuel. I also learned of a few other trainees I had yet to meet in person.

Notably, I was able to complete a part of the week’s assigned task on this very first day. The task required me to create a map of the University of Port Harcourt, situating it within the context of Rivers State and Nigeria as a whole, while clearly indicating the locations of Abuja Park and Delta Park within the university.