The diameter_crown tag is fairly well used for trees. It’d be nice when showing trees to show larger ones as larger than smaller ones. One challenge is that the values can be a bit hit and miss. There are a couple of sorts of issues there:

One is “obviously silly values from an import gone wrong” like the 289 diameter_crown=width: 2.0; color: green; that have found their way into the database, perhaps by a failed JSON conversion.

Another is “human but not machine readable values” like “4 - 7 m”

Another again is implausible values for certain tree types. For example, this is apparently a London Plane that is 5 times wider than it is high. That’s technically possible with a bit of pruning, but unlikely. Much more likely is that the data was not sanity checked before import, and the “diameter” figure here is actually a “circumference”.

In order to work around these issues, when processing the data prior to display I:

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Hi community I’m sharing my application to become a Voting Member of HOT through this diary entry.

What does HOT mean to me?

For me, HOT has been a true school since I started mapping in OpenStreetMap. At the end of 2022, as a founding member of the YouthMappers SAGEMA chapter, we were excited to begin using this tool in our research and community work. My first contact was with Juan Melo, Data Quality Senior Associate at the HOT Open Mapping Hub for Latin America and the Caribbean, who became a mentor to our chapter and taught us the tools we needed to organize our first mapathon at the campus of the Universidad Nacional de Colombia. After that experience, I decided to get more involved in volunteer mapping. That’s how I discovered the Tasking Manager and participated in my first humanitarian project: mapping after the earthquake in Morocco. That experience showed me the real impact of OSM, and how with just a little time, we can help save lives. Since then, I have been part of various HOT projects, and each of them has been a constant learning space. HOT has not only been a platform for action, but also a space for training, connection, and personal and collective growth.

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Hola comunidad, comparto a través de esta entrada mi postulación para ser parte del los Miembros de Votación de HOT

¿Qué significa HOT para mí?

Para mí, HOT ha sido una verdadera escuela desde que comencé a mapear en OpenStreetMap. A finales de 2022, como miembro fundador del capítulo YouthMappers SAGEMA, nos entusiasmaba comenzar a usar esta herramienta en nuestros procesos de investigación y trabajo con comunidades. Mi primer acercamiento fue con Juan Melo, Data Quality Senior Associate del Hub de Mapeo Abierto para América Latina y el Caribe de HOT, quien se convirtió en mentor de nuestro capítulo y nos enseñó las herramientas necesarias para realizar nuestra primera mapatón en el campus de la Universidad Nacional de Colombia.

Después de esa experiencia decidí involucrarme en el mapeo voluntario, donde conocí el Tasking Manager y participé en mi primer proyecto humanitario: el mapeo tras el terremoto en Marruecos. Esta experiencia me mostró el impacto real de OSM y cómo, con un poco de tiempo, se pueden salvar vidas. Desde entonces he estado involucrado en diferentes proyectos de HOT y cada uno ha sido un aula constante de aprendizajes. HOT no solo ha sido una plataforma de acción, sino un espacio de formación, conexión y crecimiento personal y colectivo.

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Sugiero a los desarrolladores del programa openstreetmap que deben adiconar más capas de mapas para editar , tambien tener la opcion de ver el mapa tanto en 3D y 2D, si fuera posible tambien poder girar el mapa 360º y poder ver la perspectiva completa al editar informacion. Gracias.

In the Halton region in Ontario Canada (and probably elsewhere), many two-way streets split with a boulevard are modelled as two one-way street segments (eg Way 286996210).

It has been observed (2025-May) that many (2025 May, n=244) of these are tagged cycleway=lane, which incorrectly renders in cycling maps as having a bike lane on both sides of the street.

Eg https://www.cyclosm.org/#map=18/43.33590/-79.81317/cyclosm

Many (all?) of these should be tagged cycleway:right=lane instead

Hi everyone,

I’m Paula Villar, from Paraguay with a degree in architecture from the National University of Asunción. I completed my final graduation project as an internship at the Research, Development, and Innovation Center (CIDi) of FADA-UNA, where I participated in open mapping projects, territorial analysis, and the production of geospatial data. I also served as president of YouthMappers UNA (2022–2025), promoting student engagement in collaborative mapping activities.

What does HOT mean to me? HOT represents a community that brings open mapping and geospatial data closer to the people who need them to make informed decisions about their territories. Through projects like Atlas Urbano Paraguay (AUPy) and YouthMappers activities, I’ve seen how collaborative tools and open data help make underrepresented urban and rural realities visible.

I particularly value the spirit of collective work and the opportunity to contribute from different disciplines while learning and sharing with people from diverse backgrounds. Beyond technology, HOT provides a network of support and learning that strengthens territorial management, planning, and responses to local challenges.

How did I get involved in HOT? My introduction to HOT came through my involvement with YouthMappers UNA, where I led mapping activities with students from various fields. That experience, along with my graduation project at CIDi, allowed me to contribute to initiatives like AUPy and other efforts within the YouthMappers network, where open mapping played a central role.

During the internship, I engaged in the production of cartography and territorial analysis for municipalities in both national and cross-border contexts (with Brazil), applying open mapping methodologies and free and open source tools. I coordinated field-mapping campaigns, ran mapping workshops and urban characterizations, and integrated data on buildings, vegetation, and bodies of water.

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Hello HOT Membership.

I’m Priscovia Ng’ambi, a passionate OSM Mapper from Zambia, Southern Africa. I’m more than honored to be shortlisted as a 2025 voting member. As a core founder of Local Knowledge Mappers, I serve as Head of Communications and actively contribute to OpenStreetMap as a validator, trainer, and mapper. I also lead the communication for Local knowledge Mappers, a very active open mapping organization in Zambia.

How did you become involved in HOT?

My journey with HOT began in 2020 as a YouthMappers , and at the same time a friend invited me to a mapathon. The very first HOT event I joined, sparked my interest in continue doing my Mapping on TaskManager, it also opened doors to a community that shares my passion for using geospatial technology to drive positive change.

Since then, I have been actively involved in various HOT projects such as disaster Mapping across the global and other events. I’m excited about the opportunity to contribute to the organization’s growth and impact indirectly and directly through mapping.

Coud you tell us about your involvement in HOT, Mapping and/ or Humanitarian response?

As a core founder of Local Knowledge Mappers, I have been very active in promoting OpenStreetMap and geospatial technology in my community. I’ve contributed to various mapping projects, validated data, and trained others on mapping techniques. Through HOT, I have had the opportunity to collaborate with diverse individuals and organizations, working together to create maps that support humanitarian response and sustainable development this is by contributing to mapping on TaskManager, then later on edits created are downloaded to create maps amidst of COVID-19, wars, earthquakes, cyclone etc.

What does HOT mean to you?

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Hello, I have completed work in the stilon area of Wilson. I have already moved on and made significant progress in improving Teton Pines, both the golf course and residential areas. I will provide another update once I complete work in this area!

福岡市のOSMのフットプリントが大幅に充実

表題の通り、福岡市のPLATEAUからのインポートが始まったらしい。

PALTEAUより提供がされる福岡市のモデルはLOD2であり、これに含まれている高さ、階数データがOpenStreetMapの福岡市内の建物フットプリントに与えられる。

福岡市ではこれまで、自分以外にもいろんなマッパーが活躍していたようで、中心市街地のほか、局所的に建物が充実して書き込まれているところを見かけていた。 それでも「空白地帯」は少なくなく、天神の大名地区などはかなり頑張って航空写真より描画してきた。

コレによって福岡市域のフットプリントが大幅に充実されることにあいなった。

ちなみに

福岡市(2022年度版)においては厳密にはLOD2とLOD1の間に大きな違いはない。 測量実施業者と福岡市の間で取り決めがあったランドマークだけが多少複雑なポリゴンとして実装されており、表面テクスチャも存在しない。

地下 (階数がマイナスのデータ)も存在せず、都市計画基礎調査に建物の高さおよび階数情報を入力した格好のようだ。

PLATEAUインポートの”小さな”問題点

普段マッピング対象にしているOpneStreetMap福岡市域へのPLAETAUのインポートが始まってから、自分でもびっくりするほどマッピングに対するモチベーションが減ってしまった。

どうしても楽しみを奪われてしまったような気持ちに苛まれた。

PLATEAUの元になっている測量会社が取りまとめた土地計画基礎調査の建物情報は膨大な調査の産物で基本的には網羅性が高いが、 福岡市の最新版のデータ(2024年度版)は2025年4月2日に公開されており、その間に取り壊しにあった建物などがインポートに際して「復活」してしまったり、最近のマッピング結果を上書きしてしまう箇所があり、二度手間を感じた時が最もやるせない瞬間と言えるだろう。

(あと局所的には「俺が測量した場所の方が精度高いが？」みたいな箇所もある。←張り合おうとするな。)

インポートツールにおいては、既存のOSM上のデータとの幾何マッチングや、インポート前のステージング(プレビュー)などが本当は強化されるべきなのかもしれない。

公益を考えると、マッパーの楽しみよりも地図の充実が優先されるのは間違いないが、マッピングをする人間のモチベーションが下がるのは不利益なのでは…と感じている。

とはいえ、この流れによって、我々マッパーはもっと本質的な地物の充実にとりくんだり、建物フットプリント充実することでさらに違うことに関心を寄せられるようになったりするのは間違い無いだろう。

あと、おそらくこれは過去にもあった話でデータの大規模インポートがされるたびにマッパーたちの一部は「うわッダリ〜もうやんねえ！」って吐き捨てたんだろうなと思う。めっちゃわかる。これは必要な痛みなのか？

PLATEAU以外の例だと、鳥取県のOpenStreetMapのフットプリントは非常に充実しており、これは鳥取市などが基礎調査のデータを提供してくれたかららしい。そこでもモチベーションがなくなってマッピングを止めてしまったユーザがいたようだが、フットプリントが描かれれば地物は乗せ(載せ)やすくなるは事実で、人口比を考えても、鳥取市内のPoIはかなり充実している。

ほなおしまいか？

まあPLATEAUからのインポートで「はい終了」とはならずに、地図は更新をし続けていく必要があるし、あくまで建物のフットプリントだけが充実したところで載せなければいけない地物はまだまだたくさんあるので、隙あらば唆してマッパーを増やしていきたい。

また、PLATEAUが提供されていない自治体の方が今現在は多いのだから、まだまだ描くべきフットプリントはたくさんあるし、描く人間を増やしていく必要もある。(フットプリントに限らず、特にカジュアルに地図に親しむ層が「地図に残す」っていう選択肢を取りやすくすることがとても大切だと思っている。)

福岡市に至っては、PLATEAUには地下街やアーケードの天蓋がデータとして入っていないので、簡易測量だけではどうにもならない部分があって、どうしたもんだろうなコレ。 あと福岡タワーがデータとして入っていないのはもうちょっと福岡市さん折衝頑張ってくださいよって思った。 (建築種別が「電波塔」だから仕方がない感じもあるけど。ちなみに東京タワーは東京都港区ではLOD2 / LOD3が提供されているのでPLATEAUでも描画される。)

そんなこと言いつつ結局毎日アベレージで100棟くらい描いてるんだよな。 (最近は川下りで有名な柳川市のマッピングがアツい。)

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Kota Bandung mengalami perubahan secara dinamis dalam beberapa dekade terakhir ini. Perubahan ini juga berdampak pada jalur transportasi umum di Bandung. Sebelumnya, Kota Bandung dilayani oleh sistem transportasi yang dikenal dengan nama Angkot alias Angkutan Kota. Sistem transportasi ini berdampingan dengan transportasi bus dalam kota yang dilayani oleh DAMRI.

Pengelolaan Angkot bersifat organik, tidak berada di bawah struktur pengelolaan kota. Pihak pemerintahan kota hanya bertindak sebagai regulator sementara Angkot yang beroperasi dikelola langsung oleh swasta (pemilik angkot) dan koperasi.

Dinamika yang berlangsung selama ini, ditandai dengan kemunculan sistem angkutan kota berupa bus (non-DAMRI) dengan pengelolaan yang lebih profesional menyebabkan beberapa perubahan pada pengoperasian angkot. Dari sekian jumlah rute yang ada sebelumnya, terjadi adaptasi di jalanan sehingga ada rute yang akhirnya tidak lagi beroperasi. Ada juga yang beroperasi hanya setengah rute, dan ada juga yang berubah jalurnya.

Dalam suatu kesempatan berdiskusi dengan FDTB (Forum Diskusi Transportasi Bandung), terungkap bahwa memang rute angkot Bandung saat ini sedang mengalami kegamangan. Akibatnya seperti yang kita temui seperti di atas.

Di OSM, rute angkot sudah terpetakan. Namun setelah diperiksa, ada beberapa yang menunjukkan inkonsistensi. Ada yang terputus, ada yang tidak melalui rute yang sesungguhnya, ada yang melawan arah jalan dan ada juga yang memiliki urutan member yang tidak berurutan.

Berangkat dari kondisi ini, Bandung Mapper yang dimotori oleh UPI YouthMapper bekerjasama dengan FDTB dan Kaart mencoba untuk melakukan sesuatu untuk mendapatkan data rute sesungguhnya sesuai keadaan di lapangan. Kami merencanakan untuk melakukan validasi rute Angkutan Kota Bandung dengan melibatkan komunitas yang ada, baik komunitas yang sudah terbiasa dengan OSM maupun masyarakat umum lainnya.

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V únoru 2025 byla vyhlášena nová přírodní památka Ptačí hrádek u Českého Krumlova. Tato lokalita o rozloze 24 hektarů zahrnuje lesní porosty s bohatou druhovou skladbou bylin, včetně chráněných druhů. Ptačí hrádek je také místem nedokončeného památníku z 19. století, který měl oslavovat vítězství spojeneckých armád nad Napoleonem v bitvě u Lipska.(EnviWeb.cz, Wikipedie)

Přírodní památka

Lokalita Ptačí hrádek je významná svými lesními ekosystémy, které zahrnují skalní výstupy na příkrých svazích se silikátovým podložím. Tyto biotopy jsou domovem pro řadu vzácných a chráněných druhů rostlin a živočichů. Ochrana této oblasti je důležitá pro zachování biologické rozmanitosti regionu. (Životní prostředí Jihočeského kraje)

Historie památníku

Památník, známý jako Ptačí hrádek, byl plánován jako monument na počest Karla Filipa ze Schwarzenbergu, který velel spojeneckým vojskům v bitvě u Lipska v roce 1813. Stavbu navrhl architekt Jan Sallaba, ale kvůli nedostatku financí byla dokončena pouze část stavby. Památník se nachází západně od zámku Český Krumlov a je považován za cennou ukázku klasicistní architektury. (Wikipedie, Zámek Český Krumlov, Památkový Katalog)

Technická zajímavost: Vodotrysk

V blízkosti Ptačího hrádku se nachází zbytky historické vodní nádrže, známé jako “U Vodotrysku”. Tato nádrž sloužila k přečerpávání vody z říčky Polečnice pro zásobování vodních děl a fontán v zámecké zahradě. Přestože samotný vodotrysk se nedochoval, místo zůstává technickou zajímavostí a připomínkou historického inženýrství. (Jižní Čechy, Český Krumlov)

Jak se tam dostanete

Ptačí hrádek je přístupný po zelené turistické značce ze zámecké zahrady v Českém Krumlově. Cesta je nenáročná a vhodná pro pěší výletníky. Během procházky si můžete vychutnat výhledy na město a okolní krajinu. (Jižní Čechy)

El Gran Apagón

Many people around the world will have heard about the serious power outage that Spain and Portugal had a few weeks ago, as the power grid for almost the whole of the two countries failed for the best part of the day. I know, first world problems for those who live in countries where electricity network failures (or even availability) are still a regular feature of daily life. But the event was still a useful wake-up call on just how dependent we have become on that network for so much of our daily activity, not least because the outage also left people with very limited or non-existent mobile phone and internet coverage.

The blackout happened in the middle of the day when a large part of the adult population was at work, getting home for those whose journey depends on electrified train or underground Metro services turned into a problem for so many. With bus transport and other road transport services overwhelmed by demand the only solution for a lot of people will have been a perhaps unfamiliar walk through a large city like Madrid or Barcelona. And then we get back to the collapse in the mobile telephone network, those mapping services that so many instinctively use for navigation were suddenly just as unavailable as anything else dependent on the internet.

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NOTE: I am in the DeFlock discord server. If you see any issues on Flock cameras or similar, or would like a second set of eyes in the Greater Gadsden area, ping me (I’m <@997714796537450597>) in the server, or contact me on any of my available platforms on my profile.

I have added: 1. changeset/166784827 2. changeset/164790735 3. changeset/163818346 4. changeset/159052678 So far.

I have noticed someone whether it be human or bot modifying and taking ownership of my points. If this has been noticed, please alert me immediately.

On April 26 and 27, I had the opportunity to share my experiences with YouthMappers Universitas Negeri Jakarta (UNJ) about how to contribute to the Mapillary platform.

for your information, mapilary is very helpful for open mapping activities such as openstreetmap, especially for validating road data because in reality open mappers must use all open sources and mapilary is one of the platforms for that.

in this activity i have provided information and simple techniques on how to collect street level imagery on narrow streets of jakarta using motorbikes and smartphones. YM UNJ has plans to create open mapping activities on openstreetmap and also mapilary.

This Mapillary activity is very helpful for other mappers to map areas that are still not perfectly mapped and do not have street level imagery data for validation.

more info check to this link MapilaryTraining

Recently, someone asked me to create a custom MapCSS style for JOSM that visually indicates how “fresh” OSM objects are—essentially, a way to distinguish recently updated or created objects from older ones at a glance.

Digging into the JOSM MapCSS implementation, especially the eval expression support, I realized this was very doable.

The Basic Idea

The approach is pretty straightforward. Each OSM object has a timestamp field (typically stored as a Unix timestamp). By comparing this timestamp to a reference timestamp (say, representing the current year—2025 in this case), we can calculate how “old” an object is.

So I hardcoded a reference timestamp for 2025, subtracted the OSM timestamp from it, and divided the result by the number of seconds in a year (ignoring leap years for simplicity). This gives us a rough “age” of the object in years.

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I’ve recently been taking on more tagging for wheelchair accessibility in my neighbourhood. It’s been one of those “you don’t see it until you think to look for it” kinds of things. I’m not disabled myself, so I never thought to consider the heights of steps (until I tripped on them.) Now that I look for them, I must freak out other people around me as they see me stare at my foot to see whether a step is ankle high or not.

There were a couple things I came to think about while mapping that I could not seem to find answers for in the wiki. A lot of the time, I just answer the question with the framework of “I’ve seen places do these things, so I will treat them as the standard and anything that falls under that bar is limited or not accessible.” I would be curious for others thoughts on them.

• Do establishments need powered doors to be accessible?

Here in Regina (and a lot of Canada, these were extremely common back in Ontario), doors have buttons that you can press to swing the door open mechanically. They have a wheelchair icon on them most of the time, so they are clearly marked as an accessibility feature.

While common, they are not ubiquitous. In my mapping practice, if a place does not have at least one powered door, I label it as limited wheelchair accessibility at maximum. My logic is that even if a door could be physically be opened manually by a patron in a wheelchair (as in, they can open the door and have enough space on the platform outside to maneuver while doing it – I have seen places where the platform is elevated and small enough that you would fall off trying to do so), they shouldn’t have to do that while the option of powered doors exists.

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bin der hier!

本人决定开始河北易县下辖所有镇landuse及10级行政区划补充计划，暂无截止时间，望周知。 计划名：Baoding Integrated Land Survey Project，Bilsp（比尔斯普） 预计是本人自吉安峡江县后规模最大，时间最久的一次测绘计划。数据主要来源于保定市人民政府公开的国土规划文件，百度，高德，天地图等平台，并根据主观判断合理纠偏。 （考虑到本人只能周六，周日上线，时间跨度可能较大）

Successful Open Field Mapping Activity Led by YouthMappers at Eastern University, Bangladesh President Noman Bin Hossain.

On May 16, 2025, YouthMappers at Eastern University, Bangladesh successfully conducted an Open Field Mapping activity using Mapillary, a platform for crowdsourced street-level imagery. The initiative took place in Ashulia Model Town, Savar, and was led by our club president, Noman Bin Hossain.

This field event focused on capturing and uploading street-level imagery to support the enhancement of geospatial dataand promote accessibility of real-world visuals for map editing, disaster response, urban planning, and community development.

📍 Location: Road 6, Block B, Ashulia Model Town, Khagan, Birulia, Savar, Dhaka 📅 Date: May 16, 2025 🛠️ Tool Used: Mapillary 🔗 Captured Imagery: Mapillary

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