Making the Map of India Even More Accurate! 🇮🇳📍

I am proud to share that I have successfully completed 100% of TomTom’s project: “India – POIs Located Not on Buildings.”

The primary objective of this project was to correct Points of Interest (POIs) that were not situated within the accurate footprints of buildings. An accurate map not only enhances navigation but is also absolutely essential for emergency services and local businesses.

Project Highlights:

Mission: Data Improvements

Total Contribution: Successfully fixed 631 out of 734 tasks.

Status: 100% Complete.

It has been a fantastic experience collaborating with the OpenStreetMap (OSM) community to make the map even more reliable.

Mapping isn’t just about finding routes; it’s about helping the world. 🌍📍

I am proud to contribute as a volunteer with United Nations Mappers. I recently achieved Level 5 (Off the Charts). This journey is not merely about statistics, but about reaching out to the communities that need assistance the most.

My Mapping So Far:

Total Swipes: 562+ (For data accuracy)

Total Area: 87 sq. km (Mapped territory)

Projects: Contributed to 9 humanitarian missions

Supported Entities: 2 major organizations

As a volunteer, every swipe I make and every kilometer I map helps facilitate relief operations during times of crisis. 💪

Alright, after successfully updating the boundaries in Bali, now, I’m shifting my focus further east across the Lombok Strait. Next stop: Lombok Island.

For those who don’t know, Lombok is a gem in the Lesser Sunda Islands, famous for the Mandalika International Circuit and its world-class surf breaks. It’s a new major tourist hub that definitely deserves some love on the map. I’ve already spent some time mapping the natural=* and landuse=* in the smaller islands.

---

Baiklah, setelah berhasil mengupdate batas wilayah di Bali, kini saya alihkan fokus saya ke arah timur melintasi Selat Lombok. Selanjutnya: Pulau Lombok.

Bagi yang belum tahu, Lombok adalah permata di Kepulauan Sunda Kecil, terkenal dengan Sirkuit Internasional Mandalika dan ombak selancar kelas dunia. Wilayah ini bisa jadi pusat wisata baru yang layak mendapat perhatian di peta. Sebelumnya, saya telah memetakan natural=* dan landuse=* di pulau-pulau kecilnya.

Hi all, if anyone is attending the World Urban Forum in Baku, Azerbaijan and wants to organise an OSM / open mappy meetup with me, please reach out or comment on this diary :)

https://wuf.unhabitat.org/wuf13

Hi everyone,

I’m currently using the Valhalla API for routing, and I recently started experiencing some issues (e.g., slow responses / failed requests / unexpected results).

The issue occurred on May 4th at around 5:15 PM (Egypt time, UTC+2).

I wanted to check if there is any ongoing outage or known issue with the service at that time.

If anyone else faced similar behavior or has any insights, I’d really appreciate your help.

Thanks in advance!

Editora IVIDES has produced two volumes containing the translation of the FPOSM’s ODbL License booklet

---

 

Download EN VERSION

 

The original work Tout savoir sur la license ODbL : la licence d’OpenStreetMap pour cartographier en commun was written in French in 2024 and updated in 2026 by the Fédération des Pros d’OSM, a French organization that brings together various companies and professionals working with open data, OpenStreetMap, and related software. The authors of the original booklet are: François Lacombe (Datactivist), Florian Lainez (Jungle Bus), Antoine Riche (Carto’Cité) and Christophe Biez (Latitude-Cartagène Cartographies).

The English translation was prepared by Editora IVIDES and translated by Raquel Dezidério Souto (Editora IVIDES) and Modo Levo Engelbert Steve (OSM ENSTP and OSM Cameroun).

The work is licensed under the Creative Commons Attribution-ShareAlike 2.0 France (CC BY-SA 2.0 FR). Text of the license

 

---

… See full entry

Every three years introvert communities from three Baltic countries try to gather together in one city and discuss things they’ve been doing. It is called SotM Baltics, and this year the conference comes again to Riga, Latvia. It’s in less than a month: 4th of June!

We’ve got just one day, and not a weekend even. But there will be many GIS professionals in neighbouring rooms (with their own conference), and generally the event will definitely feel like an oasis of open mapping.

I would like to invite you — whether you live nearby, or can fly in for a couple days — to attend and maybe present at the conference. There will be video recordings, and more importantly, a free lunch for everyone. And both the city and the weather promise to be splendid.

See the website for info and forms: https://2026.sotm-baltics.org/

For the next day I’m thinking of organizing either a workshop or a bicycle ride, whichever looks more fun.

Hello

1999 and tomorrow it’s 2000, deus volente, and HAL goes off the year after.

Today I did mapping in Baucau. I added some new roads and buildings that are not in OpenStreetMap. I am happy to be able to help the community get a better map.

Hello,

Below I have compiled recent news related to the OSM Foundation (OSMF) board’s work. Most of these are or are going to be publicly documented on the OSMF website, so if you follow the Atom feed for the board meetings’ page, you can skip this.

What this diary entry is

It contains my personal selection and recollection of recent OSMF board-related updates.

What this diary entry is not

It is not intended to include details or all OSMF board-related updates. For these, you can refer to the published board minutes. This entry has not been reviewed by the OSMF board.

Why?

Informing the OSMF members is important. The board minutes describe in detail what was discussed in public board meetings, but many people don’t have time or follow the Atom feed for the OSMF’s website recent changes. At some point, I was creating annual or more frequent updates for the whole Foundation, which was a lot of work during a short period, while other tasks were ongoing.

I’m posting this experimentally, and I’m going to see whether I can continue to do so semi-regularly.

---

2026 OSMF budget

The 2026 budget of the OSM Foundation is now published. You can find previous budgets here. Please note that the board may revise the budget throughout the year.

April 2026 OSMF board updates

The board had a meeting on Thursday, 30 April 2026.

You can read the Secretary’s report by Dani Waltersdorfer and the Treasurer’s report by Roland Olbricht.

OSMF’s move to the EU

Craig Allan (Chair) committed to informing the community about the status of the OSMF’s move to the EU, after a comment by Simon Poole (former OSMF and LWG chair) during the April board meeting.

OSM Local Chapters and regional communities

OSM US Inc: The OSM US and OSMF Boards had a closed, introductory meeting on 2026-04-09. The OSMF board, after a comment by imagico (guest) during the April board meeting, said that it is open to meeting with other OSM Local Chapters, if they are interested.

… See full entry

TomTom Mapping Project Progress

🖋 Project Status: Active (Working on TomTom Map Tasks)

🏆 Achievements:

🧭 Completed approx 60%

💪 Strong position on the Leaderboard

🔐 Key Focus Areas:

🗺 Map Editing

📋 Note Resolution

✅️ Data Accuracy

🎬 Future Action Items:

🤝 Join the next OSM Virtual Meetup via laptop for better participation.

👥 Discuss technical hurdles and mapping issues with the community.

Arbuckle is a small community of about 3500 people in southern Colusa County. My husband and I stop through there a few times a year as we head north. It has gas stations and a fantastic Mexican restaurant on 5th street.

So it seemed like a good place to focus on mapping. I have about 100 homes left on the north west corner of the community. I started the project in January on business trip to Chico.

While browsing Taginfo I got curious how many elements have at least one key described on the Wiki and how big share of all keys the described ones make up. Therefore, I decided to check it out.

The analysis consisted of the following parts:

1. fetching OSM database dump from planet.osm.org;
2. fetching key statistics from Taginfo with the API;
3. extracting “is in Wiki” info into separate file;
4. altering “is in Wiki” info for keys which were described on the Wiki after the database was dumped. The alteration was based on the recent changes registry;
5. processing the dump with DuckDB:
   • extracting element type, its ID, and its tags to new table: CREATE TABLE elements AS SELECT kind, id, tags FROM ST_READOSM('planet-latest.osm.pbf');;
   • exploding keys to separate records: CREATE TABLE elements_keys AS SELECT kind, id, UNNEST(map_keys(tags)) FROM elements;;
6. querying the database.

These are queries I provided to DuckDB:

Result	Query
number of all elements	SELECT COUNT(*) FROM elements;
number of tagged elements	SELECT COUNT(*) FROM elements WHERE tags IS NOT NULL;
number of elements with key(s) described on the Wiki	SELECT COUNT(*) FROM (SELECT DISTINCT kind, id FROM elements_keys WHERE "key" IN (SELECT "key" FROM 'keys_wiki.csv' WHERE in_wiki));
number of all keys	SELECT COUNT(*) FROM (SELECT DISTINCT "key" FROM elements_keys);
number of keys described on the Wiki	SELECT COUNT(*) from (SELECT DISTINCT "key" FROM elements_keys WHERE "key" IN (SELECT "key" FROM 'keys_wiki.csv' WHERE in_wiki));

I got the following results:

… See full entry

Teaser/screenshot from UrbanEye3D development version. Sport grounds with markings.

Can you identify the sports? ;)

Resolution could be higher, of course.

https://arcg.is/1rSWWf0

I often need to create a single GPX file from multiple related but different GPX files from Garmin and Wikiloc. My use case is finding route recommendations for running based on GPX files. I try to get a single GPX file so I do not have to juggle multiple files during the run. Original GPX files are also noisy, so the added advantage is having a precise path to navigate instead of dealing with GPX noise.

I start by putting all downloaded GPX files into a single directory and plotting them on the map. This step allows me to see them in relation to each other and spot any outliers early. I then simplify each GPX file to reduce the number of points and match them to OSM ways. I filter the points to make them evenly spaced. Finally, I use the OSRM trip service to create a single combined GPX file, or fall back to the minimal number of split files if they cannot be merged into a single file. I plot the resulting GPX files and simplify them to reduce the point count. Now I can sync them to Garmin and use them as a kind of basemap on a device that does not support basemaps.

Of course, this only works when I know the area in advance, can find enough existing route recommendations, and there is a reasonably complete OSM map. The current pipeline is error-prone and I find myself tweaking it to make it work with any specific set of GPX files. You can try it yourself and view the complete code on GitHub: https://github.com/evgeniyarbatov/gpx-courses

Regional osm2pgsql updated minutely as an alternative to Overpass.

Short version:

Recently, I wrote a script that could help with OSM DB data replication using osm2pgsql by filtering .osc files with a specific .poly. It doesn’t limit to a specific continent or country, it can be used with any custom PBF (e.g. a specific city), so it doesn’t need to use .fr replication, it uses planet.osm.org directly (which also could be changed).

It’s inspired by the trim_osc.py script by Zverik, but rewritten from scratch with tests, because the script unfortunately didn’t work for me (maybe I did something wrong).

It’s not a very typical thing, so I’m not sure if it will be useful for anyone, but if someone would like try to self-host a regional OSM DB with replication, I recommend to at least checking it.

More details in the repo: osm-replication-osc-poly-filter

Longer version:

A few months ago, I was looking for an alternative for public Overpass instances (due to overloaded servers) for my projects.

I read SomeoneElse’s diary about self-hosting Overpass instance. But it seems over-complicated to me. I also read many times that there are random issues with reliability and it’s time-consuming to maintain it (not sure how true it is).

I decided that I want to switch to something else for my projects. Something more low-level with greater control of data and more likely self-hosted to avoid such problems. Instead of OverpassQL. I switched to SQL with a PostGIS DB. There are no a lot of choices here, so I chose osm2pgsql.

Osm2pgsql is quite advanced tool, which I really recommend at least reading about it – it may require some time to learn it, but it’s worth to seeing some features like --output=flex, which allows to defining custom table schemas in Lua scripts with tags/geometry columns which works when importing and appending (replicating) data. It can be adjusted and optimized per project.

… See full entry

1,934 Unreviewed TIGER Road Segments Are Breaking Public Transit in Hamilton County

SORTA operates MetroNow, a microtransit service covering four zones in Hamilton County: Blue Ash/Montgomery, Springdale/Sharonville, Northgate/Mt. Healthy, and Forest Park/Pleasant Run. The service is powered by Via Transportation, whose routing engine consumes OpenStreetMap as its base map layer.

I am a daily MetroNow rider. A persistent routing failure at my address led me to inspect the OSM data that Via’s routing engine depends on. What I found on one street turned into a zone-wide audit. The results are significant enough that I want to share them with the local OSM community and ask for help.

The Street-Level Problem

A residential street in the Blue Ash zone carries two defects from the TIGER/Line 2008 Census import. Both carry tiger:reviewed=no. No human has verified this data since import.

1. False oneway=yes tag on a two-way residential dead-end street. The false one-way tag makes the routing engine calculate entry with no legal exit. The engine marks the street as unreachable. Drivers get redirected to a neighboring street. Riders get circuitous routes that bypass the correct address entirely.

2. Disconnected node gap at a cross-street intersection. Two ways representing the same street do not share a node. The routing graph treats the street as two separate, disconnected segments.

For a transit-dependent rider with mobility limitations, a routing failure is not an inconvenience. It is a service denial.

The Zone-Wide Data

I ran the following Overpass query across the Blue Ash/Montgomery zone:

[out:json][timeout:90];
way["highway"]["tiger:reviewed"="no"]
  (39.16,-84.44,39.24,-84.33);
out tags;

Results:

… See full entry

After I got some experience with hosting OpenStreetMap tiles during the revival of Openptmap, I wanted to dig deeper into the topic in order to firstly migrate Openptmap to the new flex output so that it can receive incremental updates, and secondly to be able to host some additional overlays.

I found that the only widely used way to host tiles is overv/openstreetmap-tile-server. On the first look, it is really easy to use. It takes care of importing and updating the OSM database and of rendering and serving the tiles. On the second look however, there are some major challenges and problems with it:

… See full entry