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Here is my first diary entry.
A few days ago, I gave myself the following challenge : every day, I will map one city in my department (Seine-Maritime, 76, France), going to the next letter in the alphabet for the next day, and so on.



Once again i have the pleasure to announce that we, the OpenStreetMap Carto maintainers, have prepared a new release of the OpenStreetMap Carto stylesheet (the default stylesheet on the OSM website). Once changes are deployed on openstreetmap.


I came across an article with a map in our local newspaper yesterday via a Facebook post, and at once, I thought Oh, this map looks very much based on OSM.


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There doesnt appear to be a resource available to aid in mapping The Mississippi Schools for the Deaf and the Blind, making it that much more important to map.


One of my current focuses is the University of Mississippi Medical Center. To my surprise, much of the campus was not mapped - specifically buildings and parking garages. I get it - it looks a daunting task and it is.


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You know what can really mess up carefully laid plans? What can even lead to a dangerous situation? When you get to the crossing of the South Fork Trinity River Trail and the East Fork South Fork Trinity River, a waterway that very much is still a river, and that bridge that someone has assured you they know is there is not there. There’s not even the evidence of once having footings for a bridge.

Apparently the mapper knew based on Bing aerial photography. Through thick trees. I can make guesses about how that crossing goes, too. At least when I guess wrong, I know it was a guess and might have made contingency plans around it.

Fortunately in the early days of Autumn, that ford I was LIED to about is just 4m of knee high wading without much current. That river comes out of some mountains that collect snow. It isn’t always so low.

The thing is, if it is important, it HAS to be correct. Your guess isn’t good enough. If it isn’t important, it can be left until someone who knows feels like doing it. There’s no renderer having trouble deciding how to render this crossing. It’s quite common that they aren’t specified.

I’ve been coming across a lot of guesses lately. I know they are guesses because they are wrong.

I was looking over an area I’d been working on when something started feeling wrong. It took me a couple minutes to notice that one of the roads I had aligned recently had sprouted four bridges. What? It was the unimportant spur of an unimportant low standard Forest Service road. They also get referred to as “unimproved” roads. We’re talking a road that might be produced simply by running a blade across the dirt. The whole thing probably cost a fraction of the cost of a bridge and suddenly it had four. Based on Bing imagery again, in which you can clearly see it is just a dirt road.

Why did this person do this? Well, they don’t like to see errors on the map. IT’S NOT AN ERROR. They were using iD, which uses yellow colors and the term “issue” for this sort of thing. It uses red colors and the term “error” for errors. You know what is an error? Fake bridges. But no automated error catcher is going to see those.

They added that “we can’t have” people just drawing roads over waterways without saying how they cross. Well, the road is there. The waterway might be. I’ve seen these NHD lines climb over ridges, so it’s debatable. But let’s assume the waterway is there. Seems more important that they are on the map than that we know how they cross. We can’t just leave roads off because we don’t know how they cross the waterway.

I was adding in details along a trail I’d just hiked in Prairie Creek Redwoods State Park when I noticed the beautiful curving footbridge across Hope Creek was marked as a ford. What? Then I found some more fords marked where I knew there are permanent bridges. Most were on inconsequential crossings, but 3 were on Prairie Creek where I know there aren’t fords. Prairie Creek swells in the winter to something that would be chest high at least to cross. Telling people this is a ford could change their plans in ways that are unnecessary. Where exactly those bridges are, I can’t quite remember. Unfortunately, the creek isn’t aligned well. The trail should be.

Moving over to Redwood National Park, I found bridges on the abandoned logging roads that predate the park. Popular way for loggers to cross waterways: dump dirt on it and let it wash out next winter. These are only summer roads anyway and there’s more dirt where the first came from. It’s not good for the salmon downstream, but loggers aren’t known for caring about salmon. Anyway, some of these roads still exist, some don’t because they’ve been actively removed, some don’t because the forest is good at erasing them. None of them beyond what’s already been marked as trail is in legal public access areas, but for emergency purposes it would be nice to know what’s there. I’d actually stuck a question asking if we should keep these tracks tracing USGS lines and the person adding the bridges had answered (in a changelog), of course, we wouldn’t want people to have to get out the old USGS map to follow them. This is a person who clearly trusts the USGS map even when the latest one is from 1970 and many of the quads don’t even know there’s a National Park there. Frankly, if you want to follow an overgrown, vanishing road, you better not be too lazy to get out the USGS to do it.

So anyway, when you’re looking at iD nag you about crossings and making it so easy to add in a bridge or a culvert or a ford and even getting ready to pat you on the back to say how many crossings you’ve resolved, please remember that fourth option: “ignore this issue”. It’s a very valid response! When these are important, they have to be right! If they aren’t important, they can wait. There can be consequences to guessing wrong. Don’t guess. Please please please don’t guess.

And if you “don’t like seeing errors on the map”, well, getting it wrong is an error. Leaving it is just an issue.



I recently finished this mini-project where I implemented the classic 15 puzzle game but using the standard OpenStreetMap tiles as the sliding pieces!



It’s that time of the year again, and once more, I find myself sharing my experience from State of the Map Nigeria 2024. Unlike last year, when we didn’t have workshops, this time we were spoiled with multiple workshops, covering various topics that kept participants actively engaged. Plus, for those who missed any sessions, we now have everything recorded and uploaded to our YouTube channel to revisit at any time!

Unfortunately, as the Programs Lead, I missed many of the live sessions myself. But during the few times I could sneak into a session, I was blown away by the depth and engagement. This conference had that special vibe, the kind that makes you wish it lasted longer. I’m confident that everyone who joined will be excited to return next year.

One of the things that stood out this year was the diversity in our participants. We had people coming from across the north, south, east of Nigeria, and even Ghana! Meeting new faces, like my new friend Calvin Menttor from Ghana, was an absolute pleasure. By the way, I finally got to see the Ghana cedi in person 😄.

To my Tech Crew, Joshua, and Justice, I must confess that I still mix your names up sometimes 😅, but it was a fantastic experience working with you both! Together, we made the media coordination a breeze (though, Justice, you did leave me to freeze by taking the duvet 😂).

Shout-out to my Logistics HoD, Olurunkosebi, and Welfare HoD, Titi. You both made my job so much easier! You ensured that meals arrived on time and that all the participants had a comfortable experience.

And I can’t forget Hajar from TomTom, who supported us with the mapping project used during the conference. Your contributions were invaluable, and we’re incredibly grateful.

Lastly, but by no means least, to the Chair of the Conference, Dr. Victor Sunday—thank you for not giving up on this journey and for leading us through it all. From the months of planning to the final delivery, you were the driving force that kept everything moving forward.

The last time I updated my OSM diary was after last year’s conference, and here I am again. I honestly can say that SotMNigeria2024 was a blast! I can’t wait for next year’s edition—whether it’s SotMGlobal2025 or SotMNigeria2025. Stay tuned for more updates in my next diary entry!

I also want to extend my heartfelt appreciation to AFRIGIST for hosting us. The experience was so inspiring that I hope to return to your school soon for my MSc. Fingers crossed!

Thank you to everyone who made this possible. The journey, the planning, the execution—it’s been an unforgettable experience.

Thank you, SotMNigeria2024, for a fantastic experience. #SotM #SotMNigeria #SotMNigeria2024 #UniqueMappersNetwork #AFRIGIST #TomTom #SpatialMatrix #SciStarters #OSMNigeria #OSM


Heatwaves have become a growing concern in recent years, and this year they’ve hit Bangladesh harder than ever, posing serious health risks. Our team, Three Dot, is competing in the Forewarn Disaster Hackathon 2.0, where we’re developing an app to provide heatwave alerts and an AI assistant that offers crucial advice on heat-related health issues.

One of the key features of our solution is providing users with the location of the nearest cooling centers—places with public accessibility, where people can cool down safely. These could be shopping malls, super shops, or mosques—any space that’s well-ventilated and free for the public to stay in.

The challenge we faced is that such attributes don’t exist in OpenStreetMap (OSM) for Bangladesh. Drawing on my previous experience as the former president of YouthMappers at Eastern University, I took the initiative to map out potential cooling centers. We’re tagging these places with: 1) Cooling_center: yes and 2) Cooling_center_bd: yes, to create a reliable resource for users and develop our heatwave project on top of that. Initially, our target location is, Dhanmondi and Mohammadpur.

Our initial focus has been on mapping spaces open to the community, such as large shopping malls and mosques, so that people can find refuge during extreme heatwaves, even if just for a short time.


When I finished high school, I joined the Rwanda Red Cross because I have always loved humanitarian work and felt a strong duty to help people in any way I could.





I started mapping a few weeks ago, sticking (mostly) to North Muirton in Perth for now as I have lived here for 50 years so I think I know it quite well. No doubt I’ll have done a few things wrong along the way but I’ll go back and fix, if and when I realise. As I write this, almost all the houses and flats in NM are at least drawn out with a few streets still to be tagged with the “basics”.

I intend to add (or finish)

  • Electricity Substations (all operated by SSE? - I think they all are)
  • Grit Bins
  • Public Benches
  • Garages (rented out by the local council)
  • Add all postcodes
  • Public pathways (miles of them!)
  • Back fences (the 6ft high ones around all the back gardens)
  • Grassy areas
  • Road crossings
  • Drying greens for the 8 and 4-block flats


It was on 1st July 2024 when I received the greatest News of my life that I was awarded a full travel sponsorship to attend the State of the Map Global conference 2024 in Nairobi Kenya.


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This Conference was a Good opportunity for me and all the team from Rwanda as well as Africa in General because it was the first time of Africa to host the state of the Map.


Attending State of the Map 2024 in Nairobi, Kenya, was an unforgettable experience that deepened my understanding of mapping and the OpenStreetMap community. It was truly inspiring to be part of such a vibrant and passionate group of mappers and contributors from 54 countries. The sessions on community capacity building, disaster recovery and response, and conservation have reinvigorated my commitment to OpenStreetMap. I’m grateful to the community for supporting our initiatives on Pudussery Panchayat Mapping and the creation of a spatial flood asset database. Special thanks to OSMF for the State of the Map 2024 Travel Grant. I’m excited to continue contributing and collaborating with this amazing community. Here’s to more mapping adventures ahead!


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On December 5th, 2017, I joined Humanitarian OpenStreetMap Team with the goal of making a tangible impact. Over the years, my curiosity on the HOT Tasking Manager grew, and I found myself increasingly drawn to OpenStreetMap (OSM).


https://www.openstreetmap.org/relation/15736220
What to do against these deletion? I know, youd said oh, just revert the changes. Teoretically youd be right . teoretically







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Working mainly in Africa its not rare to come across to crowdsourced powered mapped areas.
I still repair, from time to time, the disaster done in 2022 in Mogadishu