"The OpenStreetMap database is currently in read-only mode while essential database maintenance work is carried out" is code for "Time to go to bed now".

Incidently, for those who have been following my previous post, check out the rainbow crossings we have here!

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It’s time to clean-up the map.

This damage was caused by a Go Map!! user who was probably willing to be helpful by "realigning" the geometry of roads. Bad luck!

Check out those nice colourful crossings in . 🏳️‍🌈

Such paintings are becoming quite common and some of them are permanent.

If we want to make an inventory of them for , what tag should be added here? Any idea, anyone?

Ping @amapanda

Fun fact: there is high-resolution aerial imagery of the Netherlands named PDOK; it claims a detail level of 7.5cm. (Needless to say, it works out of the box in JOSM.)

This imagery covers the entire country. This picture shows the southern border with Belgium. Imagery is also available along the E19 motorway between Breda and Antwerp, even though this is on the other side of the border. 🤔

JOSM tip of the day:

If you have several instances of JOSM open at the same time, you can easily copy-and-paste nodes or tags from one window to the other. 👍

It sounds simplistic but I have used JOSM for years without thinking about that. And it does wonders once you know it.

The mysterious mapper… (5/5)

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Last week I went for a walk to survey this area. That way I would collect more data myself. It would make the mysterious mapper happy to see the gods of OSM 😉 enhanced the map so well withough being instructed for every little thing.

I looked around carefully, took notes of everything. That survey was really valuable.

One thing was missing, though: I couldn’t spot the mysterious mapper.

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The mysterious mapper… (4/5)

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A friendly word now and then, and I am always grateful for their help. Anonymous contributors cannot reply on existing notes but they open a new one next to it and we easily manage to continue the conversation.

Something was puzzling me. Although OSM data in is really dense, I cannot figure out why so many relevant objects are still missing.

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The mysterious mapper… (3/5)

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I am sure they read my answers because they now use our OSM jargon when they create further notes. "Poster box" or "Bicycle parking" are now part of their vocabulary. They even ask for missing data that is not immediately visible on the main layer, such as pedestrian crossings. It requires some skills to find this without an account.

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The mysterious mapper… (2/5)

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The notes are relevant and I honour their request and promptly add missing data.

I always provide the URL of the object I wrote, so that they can get familiar with the way we map things. I am confident they can become valuable OSM contributors. A couple of times I’ve suggested they register an account, starting with simple POI.

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The mysterious mapper… (1/5)

There is someone in my city who seems really knowledgeable about their neighbourhood.
It takes place in Schaerbeek (a part of ). This is a true story.

Every day they leave a note on OSM with something missing. A tree, a bicycle rack, a small fence…

They post anonymously but it is certainly the same person: the topic of interest and writing style are instantly recognizable.

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Waow, I didn’t expect that—because it was 1 a.m. in Belgium—but apparently this changeset of mine is the first one in the database in 2022, because changes are recorded in UTC. 🥇

changeset id="115624709"


We are lucky to have high-resolution aerial imagery in .

In some areas we can draw a very accurate map, including sidewalks and pedestrian crossings. This will make footway routing more accurate with regards to walking distances.

Here is an example of the neighbourhood I am currently working on: those are the streets with "sidewalk=separate", i.e. those streets no longer have to be used for pedestrian routing because we have enough footway connectors to bypass them.

I am currently monitoring all public stops in my area, which I have carefully surveyed in the past years.

I run a few home-made scripts to download current objects from OSM and compare them to my local database.

It is very useful to catch mistakes early. A newbie played with bus stops yesterday, and damaged route relations, which I could easily restore.

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