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21 hours ago

2025年5月24日（土）神奈川県横浜市の上大岡でOpenStreetMapマッピングパーティーを開催しました。上大岡駅東口から南東方面、谷戸地形の調査散策。 Field Papersとmuramotoさん作成の地形3Dプリントを参考にしながら、崖に張り付いた谷戸的住宅街などを確認しました。高い場所へ移動して谷戸の全景をチェック、「黒船来航」で人が集まったとされる丘に移動し、横浜港方面を眺めました。その後、富士見ポイントなどに寄りつつ散策、上大岡駅に戻りました。

note.com/osmers_club/n/n52311b32be23

2 days ago

JOSM + плагины:

• FastDraw,

• reltoolbox,

• buildings_tools,

• CustomizePublicTransportStop,

• UtilsPlugin2

2 days ago

Hallo Community,

Ich habe momentan folgendes Problem. Durch unseren Ort ist ein Mapper gegangen und hat 40 von ca. 250 Hydranten gemappt. Diese sind zum Teil fehlerhaft (Falscher Standort, Falsche Typ, kein Hydrant nur Entlüftung, Löschbrunnen als Hydrant deklariert, usw…) von den 40 Stück sind es ca. 10 Stück. Die ganzen Überfluhrhydranten ca. 20 Stück ohne Rohrdurchmesser angegeben. Somit für die Feuerwehr nur bedingt brauchbar. Da der Führungskraft wieder nachsehen muss welche Leitung es ist, um das bereite gestellte Löschwasser zu berechnen.

Ich wollte darauf hin die 40 Hydranten löschen, dies wurde mir leider untersagt. Stattdessen soll ich diese alle Richtig stellen. Dies sehe ich aber nicht als meine Job. Ich kann dies gerne an die Gemeinde weitergeben, diese wollen aber dann einen Lohn für die Arbeiten. Wer übernimmt die Kosten dafür?

Was hilft es uns, wenn nur 40 von ca. 250 Hydranten in dem System sind, wir aber seit 10 Jahren ein anderes System verwenden hier jeden Hydranten mit Bild, GPS Daten, Kennzeichnung ob Einsatzbereit, usw. hinterlegt haben. Diese Jährlich überprüfen und an den Wasserzweckverand Rückmelden mit Schäden.

Die Nachbarwehren nutzen Openfiremap, diese wird mit den OSM Daten gespeist. Sollte nun eine Nachbarwehr zu uns zum Einsatz kommen und sieht in Ihrem System, das ein Hydrant in der Nähe ist, dies aber nicht stimmt?? Weil es nur eine Entlüftung ist oder ein Löschbrunnen.

Wir sind der Meinung das solche Daten von Leuten gemappt werden sollen, die eine Ahnung haben, was Sie machen. Somit die ~Zuständige~ Gemeinde / Stadt / Feuerwehr.

Was ist eure Meinung dazu??

3 days ago

At work1, I started creating a real pedestrian routing that uses sidewalks rather than the middle of the road (unlike most pedestrian routing software nowadays). This is necessary for calculating safe routes to and from schools. In this case, it really matters which side of the road the children use and which crossing they take.

The OSM community mainly uses two methods of mapping sidewalks (and the choice between these two methods directly influences the mapping of crossings): One option is to attach them as tags to the road (for example sidewalk=both), and the other is to use separate geometry. In this post, I would like to show an example where mapping the geometry separately makes a huge difference.

 

A Dangerous Crossing

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The image shows one of Germany’s most dangerous places for pedestrians, according to accident statistics 2. This crossing is located near Rothe Erde in Aachen.

The following figure, taken from a screenshot of JOSM, shows the OSM data for this crossing.3

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As you can see, the crossing has five arms, one of which (the south east arm) is split into two separate lanes. There is a pedestrian crossing with traffic lights at each arm and tags reveal that there are sidewalks on both sides of each arm.

 

The Question

Let’s take a closer look at the two crossings at the north and north-west. Can you guess the geometry of these two crossings? Are they parallel to the next street (A in the figure above) or perpendicular to the street they cross (B in the figure above)? What do you think? Please try to answer this question, before reading on…

 

The Answer

Looking at the aereal image reveals, that neither is correct: One crossing is parallel to the next street (with the node of the crossing being placed slightly off) and the other one is (almost) perpendicular to the street it crosses:

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What I want to demonstrate with this example: It’s impossible to determine the geometry of the pedestrian crossings from OSM data with attached sidewalks. You need separately mapped sidewalks to be able to determine this geometry.

 

Why Does it Matter?

Take a look at the next figure: Cars travelling from south east to north and pedestrians crossing the arm going north get a green light at the same time. This is called “bedingt verträglich” in German, meaning “limited compatible”, and is a standard for traffic lights in Germany.

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The cars turn at an angle of 135°. This is considered dangerous because cars can travel much faster than they could at, say, 90°. This angle can be derived from OSM data. However, the position and direction of pedestrians cannot be derived: A pedestrian at position A might not see an approaching car because it is coming from behind him, while a pedestrian placed at position B will have a better chance of spotting the car in time because, in this case, the car is arriving from the left.

There is one more important detail: The distance from one side of the street to the other side of the street differs in both cases: In case A, it is 16.7 meters; in case B, it is only 13.9 meters. A difference of 2.8 meters, or about three seconds less of exposure, could make the difference between a safe and unsafe crossing. Again, this can be known with separately mapped sidewalks (if kerbs are mapped), but is almost impossible to determine otherwise.

 

This was just one brief example of an application of OSM data where the geometry of pedestrian ways is important and where this information cannot be obtained if sidewalks are mapped as part of the highway. There are more, and perhaps I will write about them in an upcoming blog post.

 

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1. Research project SAFER: The project aims to create a smart pedestrian router to help plan better school routes. In addition to distance, other criteria like safety (which cannot be measured by numbers) will be taken into account. ↩

2. In a 2023 study, I analysed all cluster points of pedestrian accidents in Germany between 2019 and 2022. With 8 accidents, two of which resulted in severe injuries, this crossing was ranked 10th. ↩

3. I removed some unrelated details. ↩

3 days ago

osm.org/user/shawnster

4 days ago

En el primer trimestre de 2025 me he dedicado a mejorar el mapeo en la Amazonía colombiana, enfocando resguardos indígenas, caseríos y asentamientos, ríos y, con mayor preocupación, selva deforestada.

5 days ago

got exams will return 5 days ago

Liste d’attributs occasionnels Lignes (rues)

• Pour les trottoirs sur lesquels passent des rues : crossing:continuous=yes mais non applicable si la rue est continue et le trottoir séparé (voir traffic_calming=table)

Points (objets)

• Pour les panneaux d’affichage libre en France : advertising=board et message=opinions;non_profit

Surfaces (aires, bâtiments)

• Pour les baraques, cabanes et autres bâtiments mixtes stockage et travail ne pouvant être à usage d’habitation : building=shed sauf si building=barn (grange)
• Pour les buissons artificiels n’étant pas des haies : natural=shrubbery avec shrubbery:density=dense (si bloque), medium (si franchissable au besoin) ou sparse (si aéré)

6 days ago

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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:

• Make sure that diameter_crown is actually a number > 0. If it isn’t, I default it to 5.
• Make sure that diameter_crown is not more than 35. 35 was chosen as a reasonable cut-off for “large, but not unfeasibly so” (there are genuinely larger trees of course, but many in OSM are just rubbish data).

It would have been nice to have used the actual “diameter_crown” value when rendering. On raster (which I’ve not looked at yet) that would have meant one icon per zoom level, which isn’t ideal. On vector, it would be nice to have the MapLibre map style do calculations based on diameter_crown directly (the documentation suggests that something might be possible, but is spectacularly unclear, and attempts to do something with that haven’t yet worked), so instead for now I went with three “large” sizes and one “normal” one.

Here is a map, centred on a large rhododendron.

6 days ago

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.

♦

¿Cómo me involucré en HOT?

Tras concluir nuestro primer proyecto de mapeo, seguí buscando maneras de continuar aprendiendo y aportando. Volví a contactar a Juan Melo para preguntar por iniciativas más locales, y así participé en un proyecto que promovía la movilidad sostenible en Colombia, mapeando las ciclovías de las principales ciudades. ♦ Posteriormente, me uní a un proyecto de gobernanza territorial que, junto a la Universidad Autónoma Latinoamericana y HOT, buscaba capacitar a líderes de barrios informales en el uso de OSM para fortalecer sus procesos organizativos. Acompañamos a 24 organizaciones sociales en Medellín, brindándoles herramientas para mapear sus territorios y fortalecer su capacidad de incidencia. ♦ A finales de ese año, gracias a mi participación en estos procesos y a la experiencia que había adquirido en el Tasking Manager, fui convocado al piloto de la brigada de mapeo humanitario de HOT. Esta iniciativa buscaba potenciar el trabajo de mapeadores de América Latina, fortaleciendo su capacidad para completar proyectos y validar datos en activaciones humanitarias. Desde entonces, he colaborado en iniciativas regionales como la Mapatón Nacional de Gestión de Riesgos en Ecuador, la respuesta al huracán Otis en Acapulco (México), y los mapeos amazónicos enfocados en la prevención de incendios e inundaciones en la cuenca del Amazonas. Estas experiencias han consolidado mi compromiso con HOT y con el poder transformador del mapeo colaborativo. ♦

¿Por qué quiero ser miembro con derecho a voto?

Quiero ser miembro con derecho a voto porque me siento profundamente comprometido con la misión de HOT y deseo asumir un rol activo en las decisiones que dan forma al futuro de nuestra comunidad. Desde mis primeros pasos en el mapeo humanitario, he visto cómo HOT no solo es una plataforma técnica, sino también una red de personas que creen en la acción colectiva, la justicia territorial y el poder de los datos abiertos para transformar realidades a nivel local, regional y nacional. Mi participación en proyectos de mapeo en contextos urbanos y rurales me ha permitido comprender los desafíos y las oportunidades que enfrenta las comunidades nuestra región. Creo que la experiencia adquirida en los diferentes proyectos en los que he participado me brinda una perspectiva valiosa para contribuir a las decisiones estratégicas de la organización. Ser parte del equipo de miembros con derecho a voto representa para mí una gran responsabilidad: la de velar por una comunidad diversa, ética y participativa. Me motiva especialmente aportar a que más personas de América Latina encuentren en HOT un espacio de aprendizaje, incidencia y crecimiento, tal como lo fue para mí desde el primer momento.

¿Cómo planeas participar en HOT como miembro con derecho a voto? ¿Te interesa algún grupo de trabajo?

Como miembro con derecho a voto, quiero participar activamente en la construcción de una comunidad más inclusiva, fortalecida y representativa. Planeo asistir a las asambleas, leer y analizar cuidadosamente las propuestas que se someten a votación, y asegurar que las decisiones que tome reflejen las necesidades de los territorios y comunidades con las que trabajo, especialmente en América Latina. Me interesa vincularme a tres grupos de trabajo fundamentales para mí:

1. Comunidad: porque creo firmemente en el valor de una comunidad global fuerte, que potencie a los grupos locales y fomente conexiones horizontales de aprendizaje, apoyo mutuo y colaboración.
2. Gobernanza: porque me interesa aportar una mirada joven y regional a los temas de estructura organizacional, participación y transparencia, para asegurar que HOT crezca de forma justa y democrática.
3. Entrenamiento: porque he vivido de primera mano cómo el acceso a materiales de formación adecuados puede transformar la manera en la que las personas se vinculan a OSM y HOT. Quiero contribuir a la creación y mejora de recursos formativos accesibles, contextualizados y diversos, especialmente en español. Estoy convencido de que mi participación activa en estos espacios puede aportar tanto en la consolidación de capacidades como en el fortalecimiento institucional de HOT.

¿Cuál considera usted que es el mayor desafío de HOT y cómo ayudará a abordarlo?

Uno de los mayores desafíos que enfrenta HOT es garantizar la equidad en la participación y la representación real de la diversidad geográfica y cultural que compone su comunidad. Si bien HOT ha crecido enormemente, todavía hay brechas en cuanto a acceso, visibilidad y toma de decisiones para muchas comunidades del Sur Global. Para abordar este desafío, aportaré desde mi experiencia territorial en procesos de formación, incidencia y colaboración con organizaciones sociales. Promoveré la visibilidad de iniciativas lideradas por jóvenes y comunidades locales, y trabajaré para que HOT no solo acompañe procesos locales, sino que los reconozca como motores clave en la toma de decisiones estratégicas. La inclusión no debe ser solo un valor, sino una práctica diaria que guíe nuestras acciones colectivas.

6 days ago

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

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

8 days ago

hi

2 days ago

Když se v pozdním jaru nebo na začátku léta procházíte po loukách v okolí Lipna, Frymburka nebo Českého Krumlova, občas si všimnete neznatelných změn v porostu, rovných linií, kde vegetace roste s jinou intenzitou. Nejde si nevšimnout ani častých betonových skruží uprostřed polí, nebo pastvin.

Jsou to stopy minulosti, kdy se ve velkém prováděly meliorace s cílem odvodnit zamokřené louky a přeměnit je v intenzivně využívanou zemědělskou půdu. Dnes tyto bývalé, ale stále funkční zásahy do hydrologického režimu krajiny znovu otevírají diskuse. Nejen mezi vědci a ochranáři, ale i mezi zemědělci a krajinnými inženýry.

Dědictví meliorací

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• Na obrázku je výřez louky s patrnými liniemi melioračních brázd u osady Skláře, nedaleko Hořic na Šumavě. Středem louky prochází hlavní odvodňovací kanál, který je osazen skružemi. Ty slouží především jako přístup k čištění. Někdy je z kanálů vyvedena voda na povrch za účelem napáječky dobytka

Meliorace se budovaly ve velkém v 60. až 80. letech 20. století, a to včetně podhůří Šumavy. Podzemní potrubní systémy, i povrchové odvodňovací příkopy, regulační stavby – to vše mělo pomoci k lepším pěstebním podmínkám a možnosti vjet na pole těžkou mechanizací. Jenže s nástupem klimatických změn a častějších epizod sucha začíná být jasné, že meliorace zanechaly v krajině dědictví, které je v nových podmínkách kontraproduktivní. Louky, které by měly přirozeně zadržovat vodu, ji naopak rychle odvádějí pryč.

Zadržet vodu, kde to jde

V posledních letech se karta obrací. V rámci projektů podporovaných nejen z národních, ale i evropských fondů, vznikají na někdejších odvodněných lokalitách nové tůňky, mokřady, revitalizují se staré příkopy. V praxi to znamená i technicky náročnou a ne vždy úspěšnou likvidaci starých drenážních trub a zásypy potrubních jam, či obnovu pramenišť, které byly melioracemi zaslepeny. Vše za účelem zlepšení schopnosti krajiny zadržet vodu a podpořit biologickou rozmanitost.

♦

Například na louce nedaleko Veleslavic, byla v minulém roce vybudována soustava mělkých tůněk. Kromě nich i zasazeny nové stromky na březích a doplněno pár odpočinkových míst pro výletníky. Nové tůňky nemají žádný stálý přítok, voda se sem dostává přirozeně ze svahu když zaprší a nebo je v kopcích vlhko. Kolem tůní už začíná růst rákosí a vodní rostliny, bude ještě pár let trvat, než se to celé usadí. Toto zavodnění louky má význam pro místní mikroklima a biologickou rozmanitost jak rostlin, tak živočichů. Skutečný efekt tůňkami vylepšené louky poznáme až v budoucích letech.

Louky jako kulturní fenomén

Louky v oblasti Šumavy a jižních Čech nenesou pouze produkční hodnotu. Jsou příkladem kulturní krajiny, která vznikla díky staletému soužití člověka s přírodou. Jejich pravidelné sečení a pastva krav, ovcí či koní zajišťuje otevřený charakter krajiny a brání samovolné sukcesi dřevin. Navíc jsou domovem řady ohrožených druhů rostlin a živočichů, které jsou vázané na vlhké nebo extenzivně obhospodařované travnaté biotopy. Proto jsou tyto typy luk zařazovány do agroenvironmentálních programů, které poskytují finanční podporu za jejich šetrné obhospodařování.

Popis v OpenStreetMap

Pro přírodovědce, mapovače krajiny i nadšence otevřených dat má OpenStreetMap možnost, jak tato historická i nově vznikající opatření zaznamenat. Mapování starých odvodňovacích příkopů, melioračních sítí, ale i nových tůněk je možné provádět pomocí tagů jako drenáže man_made=drain, jezírka water=pond, louky landuse=meadow, mokřady natural=wetland nebo pastviny pasture=*. Podklady lze čerpat z aktuální ortofotomapy, historických map (např. 3. vojenské mapování), ale nenahraditelná je i osobní ználost terénu a rozhovory s místními hospodáři.

Co s tím?

Kdybyste zavedli řeč s místními lidmi, jejichž rodině ty louky patřily před kolektivizací a později po privatizaci, vyjádření nebude úplně jednoznačné. Mají historickou zkušenost, že mokrá louka nebyla průchozí pro žádnou zemědělskou techniku, takže zbývalo než pást krávy, nebo odvodnit. Tenkrát, v době budování nových zítřků sjedocená a vysušená pole a louky mohly nést vyšší úrodu.

Dnes, z různých příčin, ať už je to výnosnost na hektar a tržní cena hospodářských plodin, je tady zemědělská výroba ekonomicky nemožná, takže východiskem je skutečně jen udržování luk sečením s finanční podporou od státu, nebo pastvou menších stád krav.

Z pohledu vědy i správy krajiny je důležité mít přehled o rozmístění melioračních systémů a současně sledovat, kde dochází k funkčním revitalizacím. Není vždy jednoduché najít v archivech zákresy melioračních prací, často vůbec neexistují. Mapování podle leteckých snímků v tom může hrát doplňkovou roli jako nástroj komunitní participace a sdílení informací o krajině napříč obory.

V době, kdy krajina čelí klimatickým výzvám, tu hraje roli i tzv “overview efekt” kdy se pozorovateli propojí více různých postřehů na totéž do jednoho celku. Jsou potřeba otevřená data, otevřené oči a ochota dívat se na krajinu jinak, než jen prizmatem okamžitého výnosu.

Další odkazy:

Voda / Klima / Krajina - portál na participační procesy týkající se ekologických témat

Meliorace prohlubují sucho. Stát je ale neřeší, vyhovují totiž agrokorporacím - Deník Referendum, Radek Kubala, 11. 6. 2020

Autor se věnuje dobrovolnému mapování, překladům open-source softwaru a popularizaci ochrany krajiny v Českém venkovském prostředí.

2 days ago

Vernetzungstreffen für Geoinformatiker:innen, FOSSGIS-Konferenz-Teilnehmende, Mitglieder und Interessierte in der FOSSGIS-Community

Es begann mit einem Anruf einer Onlineteilnehmerin der FOSSGIS 2025, die ihre Begeisterung zur Konferenz zum Ausdruck brachte und nach Vernetzungsmöglichkeiten fragte. Die Idee ein Vernetzungstreffen online zu veranstalten, in dem sich die Teilnehmenden kennenlernen und austauschen, war im Raum.

Für den 04. Juni geplant, startete die Veranstaltung um 18 Uhr. Sieben Teilnehmende waren dabei, lernten sich kennen, erzählten woher sie kommen, womit die sie sich hinsichtlich FOSSGIS, Geoinformatik beschäftigen und suchten und fanden Kontaktpunkte. Oft ist es so, dass Geoinformatiker:innen in ihrer Institution die einzigen oder in einem sehr kleinen Team sind und deshalb den Austausch über die eigene Institution hinaus brauchen. Veranstaltungs- und Aktivitätenhinweise wurden dankbar angenommen.

Katja stellte den Verein und aktuelle Aktivitäten vor und stand für Fragen zur Verfügung.

Alle waren sich einig, dass diese Art Treffen sehr sinnvoll sind und fortgeführt werden sollten, um Interessierte Leute onzuboarden und Vernetzung zu ermöglichen. Auch Themen in Kleingruppen besprechen, wurde als gute Idee bestätigt.

Als Folgetermin ist der 10.09.025, wieder um 18 Uhr vereinbart.
Wiki: www.fossgis.de/wiki/Termine/Vernetzungstreffen

♦
Ankündigung Vernetzungstreffen am 10.09.2025 mit Link zum Wiki

2 days ago

Apprendre à utiliser JOSM

• Installation JOSM et CREATION d’un Compte sur Openstreetmap
• PRISE EN MAIN DE JOSM ET CARTOGRAPHIE DES BATIMENTS
• Cartographie avec JOSM: l’outil Fusionner les chemins
• Tuto Extrême - JOSM en 3 minutes
• How To Get Started with JOSM
• Cartographie avec JOSM: mode Tracer
• Configuration JOSM
• PRISE EN MAIN DE JOSM ET CARTOGRAPHIE DES BATIMENTS
• JOSM - Voir les adresses en couleurs !
• Autres vidéos

3 days ago

10 years + a few days ago, we held the White House Mapathon.

obamawhitehouse.archives.gov/blog/2015/05/28/citizen-cartographers-unite-report-first-white-house-mapathon

Over a hundred mappers gathered and livestreamed the happenings, shared stories of cool mapping projects, dialed in Peace Corps volunteers from the across the globe, and naturally mapped. There were cake pops decorated like globes. Along the walls, stunning reproductions of historic American maps provided by the Archives (I snagged a couple prints, they hang in my office to this day). Everyone dressed formal for the setting, except Alex Barth in usual attire, commenting “Wow OpenStreetMap is fancy today”.

Can you imagine that occurring today? Unimaginable. Of course not.

These kinds of convenings are by their nature fleeting. A recognition and shared touchstone for future work. Yes a bit hype-y, but grounded in real work and real opportunity. This was the era of upswing in open government, open data, the early days of 18F and USDS. The community that gathered there continued championing open mapping in the years after. Some of the most enduring are YouthMappers www.youthmappers.org/ and OSM US government initiatives openstreetmap.us/our-work/trails/.

We’re now in the age of BS. Truth or not does not matter. That comes from government and AI vibes.

OpenStreetMap is anti-bullshit www.linkedin.com/posts/mikelmaron_i-just-joined-the-humanitarian-openstreetmap-activity-7270058802240978945-89Oj/. OSM is for Truth. We map what’s on the ground, right before our eyes. Humans are at the center of the process. The infrastructure connects local information to a global ecosystem nearly effortlessly. And the projects are resilient, beyond any individual organization’s control. In my mind, my brief time in government was focused on dissolving barriers, between government and the communities it serves, and within government as well. Intentionally, this connection to open community means endurance beyond any entity’s interests, allowing for ebb and flow of collaboration. This month, OpenStreetMap will be contributing to the proceedings at the United Nations Open Source Week www.un.org/digital-emerging-technologies/content/open-source-week-2025

Anyway, it was super fun and I learned a lot about pulling off events like this. I proposed something that seemed so implausible, but was taken seriously by my wonderful collaborators Cori Zarek Denise Brown Benson Wilder Megan Smith.

Now we need to be more creative than effort, dissolve more barriers than ever, do things quickly and adaptably, and definitely have fun.

4 days ago

Como é habitual para mim, encontrei-me perdido em indecisões sobre como começar coisas.

Desta vez foi na sequência de uma conversa de pequeno-almoço em que estive a falar de projetos interessantes que rodem o OpenStreetMap, onde constatei que tenho que arranjar um sitio onde reunir links para mais tarde os encontrar sem ter que andar a fazer scroll em conversas de Telegram, Discord ou Mastodon.

E depois de considerar as muitas opções disponíveis sem encontrar uma ideal, decidi que o melhor é deixar de fazer planos e fazer-me à estrada.

Coisas interessantes que descobri hoje:

• Open Architect Map - Interactive map showing the architects who created buildings and structures, based on OpenStreetMap and Wikidata.
• Open Etymology Map - Interactive map that shows the etymology of names of streets and points of interest based on OpenStreetMap and Wikidata.

5 days ago

22/05/2025-28/05/2025

♦

[1] “Lastupdated” – new JOSM Map Style by ryphyrin | © ryphyrin | Map data © OpenStreetMap contributors.

Mapping campaigns

• Séverin Ménard shared a new blog post ♦►♦ about the ongoing building damage mapping in Mayotte, with statistics for each of the territory’s 17 communes, including hourly updated pie charts showing mapping progress and the damage classes. The preliminary results reveal the heterogeneity of the damage across the communes and show that the north-eastern coasts were not necessarily the areas most severely affected.
• The newly added Mastodon account ‘OpenStreetMap Wiki Proposals’ toots when proposals are open for voting, with its latest toot being: ‘A new OpenStreetMap Wiki proposal aims to improve power circuit routing by introducing standardised relations for circuits and line sections, enhancing electrical grid modelling’.

Community

• Peter has calculated the year when the sun first stopped setting on the British Empire, based on the boundaries in OpenHistoricalMap (we reported earlier).
• Peter Brodersen has developed a prototype route planner for Denmark that avoids roads named after men. It was made possible by using the OSRM routing engine and the Wikidata entries referenced by the name:etymology:wikidata OSM tag.
• After logo submissions and a community voting process, Unique Mappers Network has unveiled the official logo for State of the Map Nigeria 2025.
• Faced with the limited storage capacity of his older Garmin device, which can hold only one map at a time, Pascal Neis has developed custom minimalist Garmin maps based on OpenStreetMap data to ensure they remain small enough to fit.
• In a recent instalment of the Mapper Diaries vlog series, Gregory Marler talked about his participation in the second UK quarterly project of 2025, a healthcare-themed mapping campaign, by mapping neighbourhoods in Dundee City, Scotland.
• Christoph Hormann offered his views about the ways diverse cultures collaborate within OpenStreetMap, highlighting the challenges that arise from these cross-cultural interactions.
• KhubsuratInsaan’s diary entry reflected on mapping in India, highlighting the difficulty of identifying house numbers. The comments discuss whether street plans may be used for OpenStreetMap.

Local chapter news

• The OpenStreetMap US May 2025 newsletter has been published. The highlights are the improvements to the OSMCha, the support program for participation in the SotM US 2025 and the celebration of the OSM US’s 15th anniversary.
• Oliver Rudzick and Katja Haferkorn released ♦►♦ a report on the 23rd FOSSGIS-OSM Community Meeting, held in May 2025.

Events

• OpenStreetMap contributors are organising ♦ a collaborative mapping workshop called Kartenwerkstatt Augustusburg, to improve regional map data and foster community engagement in Augustusburg, Germany.

OSM research

• HeiGIT reported that a new paper was published in African Transport Studies. This study investigated the impact of school sessions on traffic congestion in Nairobi using openrouteservice, an open-source routing engine that utilises OpenStreetMap data to model road networks. Results highlighted how children’s mobility needs are often overlooked in transport planning.

Maps

• The author of Maps Interlude presents various socio-economic factoids on maps, with their latest showing the origins of Havard’s international students during the previous Trump presidency in 2018.
• Christoph Hormann introduced another extension to his Musaicum satellite image mosaic coverage, which includes the European Arctic islands: Svalbard, Franz Josef Land, and Novaya Zemlya.

OSM in action

• The World Heritage Journeys Europe portal has adopted OpenStreetMap and Mapbox for their maps of world heritage catalogued by UNESCO and the European Union.
• Where Filmed’s ‘Filming Places Near You’ feature lets users discover nearby filming locations via an interactive web map powered by OpenStreetMap and Leaflet.

Open Data

• Ralph Straumann commented on grid’s interview with Jennings Anderson, a software engineer at Meta, noting that it’s overall an interesting – albeit clearly insider – perspective on the Overture Maps Foundation, OSM, and the evolution of geodata in general.

Software

• [1] Rphryin published his first JOSM map style: LastUpdated. It displays the last update time of each OSM way shown on the screen. This is useful for checking whether a particular mapping area has been updated recently.
• Andrii Holovin has developed osm-diff-state, a tool designed to find the state file corresponding to a specific diff in the OpenStreetMap minutely/hourly/daily replication feeds.
• The team behind Contour has launched a browser-based GIS platform that uses natural language commands to perform spatial analysis and mapping, aiming to simplify traditional GIS workflows and make spatial tools accessible without coding.
• András Zlinszky explained how to load Sentinel-2 true-colour satellite imagery into the Locus Map app using its Web Map Service feature.
• HeiGIT, in collaboration with the Federal Agency for Cartography and Geodesy, have worked on the LaVerDi Project, which integrates freely available satellite data with crowdsourced OpenStreetMap data to support continuous, large-scale land cover monitoring and improve the detection of landscape changes in Germany.
• To celebrate its 15th anniversary, OsmAnd has published some of its growth statistics.
• GeoObserver introduced ♦►♦ Radinfra.de, a new platform that visualises Germany’s cycling infrastructure using open data and user-friendly maps.

Programming

• Researchers at the University of Freiburg have developed Loom, a tool for efficient multi-modal route planning using OpenStreetMap data, enabling detailed and customisable transport network analysis.
• OMP explained ♦ how they built a custom OpenStreetMap-based map service using mbtileserver.

Releases

• Jake Low explained the latest upgrade to OSMCha, highlighting the performance improvements achieved by building augmented diffs instead of using Overpass queries.
• The Panoramax mobile app v1.7.1 has been released. The app is now available on F-Droid and is being prepared for iOS. Highlights of the new changes: app info is added to the EXIF data of uploaded pictures and there is a new settings page and splash screen.

Did you know that …

• … there’s an OpenStreetMap Bluesky feed? It allows you to see posts featuring the hashtags #osm and #openstreetmap.
• … you can open a random OpenStreetMap note from any country of your choice?
• … the OpenStreetMap API has a rate-limiting feature that prevents new users from committing large, potentially damaging changesets? After it was implemented in the backend, some user-facing apps, such as iD, had to make adjustments to support this change. As a result, users running older versions of the editor may find their large changesets disappearing into thin air without any clear explanation or error message.

OSM in the media

• Game developers have integrated OpenStreetMap data into simulation games like City Bus Manager and Global Farmer, enabling players to build and manage real-world-inspired transport and farming systems while encouraging contributions to improve map accuracy.
• Gregory Thomas, of the San Francisco Chronicle, reported that Megan Gardner has ridden every publicly accessible road in San Mateo County – a feat spanning 2,800 miles. To accomplish this feat, Gardner relied on Wandrer, a social mapping platform built on OpenStreetMap data. The app turns everyday walks, hikes, and bike rides into personal quests, awarding symbolic points and rewards to users who go the farthest. Participants can track their progress and compare standings on leaderboards showing who is covering the most ground and where.

Other “geo” things

• The mapShare creators have launched a platform that lets users share and discover custom Google Maps, helping travellers find curated local recommendations such as sightseeing spots and photo locations, with strong initial coverage in Japan.
• Rainer Follador has developed ‘delta-relief’, an project designed to enhance the visualisation of SwissTopo’s LiDAR data by highlighting subtle terrain variations for easier interpretation. It has been implemented as an interactive online map, with a portion of the data from eastern Switzerland now available to the public at lidar.cubetrek.com.

Upcoming Events Country Where What Online When ♦ Chanakya Puri Tehsil 17th OSM Delhi Mapping Party (Online) ♦ 2025-06-01 ♦ Heidelberg Rhein-Neckar OpenstreetMap Treffen ♦ 2025-06-02 ♦ Salzburg OSM Treffen Salzburg ♦ 2025-06-03 Missing Maps London: (Online) Mapathon [eng] ♦ 2025-06-03 ♦ Stuttgart Stuttgarter OpenStreetMap-Treffen ♦ 2025-06-04 iD Community Chat ♦ 2025-06-04 OSM Indoor Meetup ♦ 2025-06-04 ♦ Brno Kvartální OSM pivo ♦ 2025-06-04 ♦ Säffle kommun Svenskt återkommande communitymöte ♦ ✓ 2025-06-04 ♦ Augustusburg Kartenwerkstatt Augustusburg ♦ 2025-06-07 ♦ København OSMmapperCPH ♦ 2025-06-08 ♦ Chanakya Puri Tehsil 17th OSM Delhi Mapping Party ♦ 2025-06-08 ♦ 中正區 OpenStreetMap x Wikidata Taipei #77 ♦ 2025-06-09 ♦ Salt Lake City OSM Utah Monthly Map Night ♦ 2025-06-11 ♦ San Jose South Bay Map Night ♦ ✓ 2025-06-11 ♦ Hamburg Hamburger Mappertreffen ♦ 2025-06-10 ♦ Sydney Social Mapping Event in Parramatta ♦ 2025-06-11 ♦ Stainach-Pürgg 17. Österreichischer OSM-Stammtisch (online) ♦ ✓ 2025-06-12 ♦ Bochum Bochumer OSM-Treffen ♦ 2025-06-12 ♦ München Münchner OSM-Treffen ♦ 2025-06-12 ♦ Tours State of the Map France 2025 ♦ 2025-06-13 – 2025-06-15 UN Mappers #ValidationFriday Mappy Hour ♦ 2025-06-13 OSMF Engineering Working Group meeting ♦ 2025-06-13 ♦ Berlin 204. Berlin-Brandenburg OpenStreetMap Stammtisch ♦ 2025-06-13 ♦ Besançon Apér’OSM Bourgogne-Franche-Comté ♦ 2025-06-14

Note:
If you like to see your event here, please put it into the OSM calendar. Only data which is there, will appear in weeklyOSM.

This weeklyOSM was produced by Elizabete, MarcoR, PierZen, Raquel Dezidério Souto, Strubbl, TheSwavu, barefootstache, derFred, mcliquid.
We welcome link suggestions for the next issue via this form and look forward to your contributions.

5 days ago

OBDL but governments like Hungary (homophobia), Isreal (genocide), groups like the Republican Party (every stripe of bigotry imaginable) and companies like Tesla (same) are blanket excluded from using, copying, redistributing or accessing OSM data in any way, shape or form?

6 days ago

My name is Saïd Abou Kharroub, and I’m truly honored to be nominated as a candidate for a 2025 HOT voting member. I’m excited to share a bit about my journey with HOT, my current work in Lebanon, and my aspirations as a voting member.

To me, HOT shows the incredible power of people working together with open data in humanitarian crises. It’s amazing how a global community can use mapping to make a real, life-saving difference. What I really appreciate is HOT’s dedication to empowering local communities and building a space where knowledge and skills are freely shared.

My involvement with HOT became very personal and hands-on through the “Lebanon: Conflict - October 2024” project. I got involved when I arrived in Lebanon in January 2025, taking on the role of Lebanon Local Consultant for HOT’s H2H funded project, “Collaborative Approaches to Mapping Damage in Lebanon.” I’ve also been a strategic advisor for CivAPI.com, a data API provider that includes OpenStreetMap layers like buildings, roads, and infrastructure. This advisory role has given me an even deeper understanding of how crucial data provision is in humanitarian and development work.

In my role in Lebanon, I’ve focused on coordinating local data efforts, engaging with important partners, and advising on data protection, especially given the local context. This work includes:

Organizing and hosting local mapathons to grow the OpenStreetMap community and fill important data gaps for humanitarian response. We’ve already held our first mapathons with the Lebanon Reforestation Initiative, Beirut Arab University and are planning the second with the Beirut Urban Lab.

Working closely with HOT staff and humanitarian partners to address specific infrastructure gaps, often responding to requests from groups like UNOSAT.

Helping HOT staff review damage assessment methods, aiming to match different approaches (like automated satellite analysis versus manual visual checks) to various situations, and making sure local needs are heard.

Actively connecting with local data coordinators and partners, providing updates on the situation, and leading data protection training, along with other OpenStreetMap use and editing workshops.

Identifying what data is needed and what risks exist when collecting information on critical infrastructure for humanitarian needs, such as health sites, schools, and heritage sites, based on feedback from stakeholders.

My background in international development, peacebuilding, community engagement, and project management, as seen on my LinkedIn profile, has given me a strong grasp of complex humanitarian situations and why local, ethical data approaches are so important. My experience managing multi-stakeholder projects, facilitating cross-cultural collaboration, and conducting detailed analytical research directly informs my work with HOT in Lebanon.

I want to become a voting member because I believe I can bring a crucial on-the-ground perspective from an active crisis zone. This, combined with my experience in community building, data coordination, ethical data practices, and my advisory role with a data API provider using OpenStreetMap, can contribute to HOT’s governance and strategic direction. I’m eager to play a more formal part in shaping the future of an organization that’s making such a significant impact.

As a voting member, I see my most important responsibility as being a good steward of HOT’s mission and values, especially championing localization and ethical data practices. This means truly listening to the many voices in our global community, particularly those directly affected by crises. It means making informed decisions that prioritize effective and ethically sound actions, and ensuring everything we do is transparent and accountable. It’s about upholding what makes HOT unique and effective.

I plan to get more deeply involved by actively participating in discussions and decisions, sharing what I’ve learned from my project in Lebanon, and advocating for approaches that truly empower local communities to lead their own mapping initiatives. I’m especially interested in joining the Community Working Group to help boost local engagement and the Data Quality and Validation Working Group to help ensure robust data practices.

One of HOT’s biggest challenges, as I see it, is making sure our impact is truly local and sustainable beyond immediate crisis response, and that strong data protection is built into everything we do. While global coordination is vital, it’s crucial to foster strong local OpenStreetMap communities who can independently handle their own mapping needs and understand the ethical side of data collection. I believe I can help with this by using my direct experience in setting up and nurturing local mapping efforts in Lebanon, sharing insights on practical data protection in sensitive areas, and pushing for resources that support long-term local capacity building and self-sufficiency.

6 days ago

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.

♦

How did I get involved in HOT?

After completing our first mapping project, I looked for more ways to keep learning and contributing. I reached out to Juan Melo again and got involved in a project promoting sustainable mobility in Colombia, mapping bike lanes in major cities. ♦ Later, I joined a territorial governance project, in collaboration with the Universidad Autónoma Latinoamericana and HOT, which aimed to train leaders from informal neighborhoods in using OSM to support their organizational processes. We worked with 24 grassroots organizations in Medellín, providing tools to map their territories and strengthen their advocacy efforts. ♦ By the end of that year, thanks to my participation in these processes and the experience I had gained using the Tasking Manager, I was selected for the pilot phase of the HOT Humanitarian Mapping Brigade. This initiative aimed to empower mappers from Latin America by strengthening their ability to complete projects and validate data in humanitarian activations. Since then, I have collaborated in regional initiatives like the National Risk Management Mapathon in Ecuador, the response to Hurricane Otis in Acapulco (Mexico), and Amazon-focused mapping projects for fire and flood prevention in the Amazon basin. These experiences have solidified my commitment to HOT and to the transformative power of collaborative mapping. ♦

Why do I want to be a Voting Member?

I want to be a Voting Member because I feel deeply committed to HOT’s mission, and I want to take an active role in shaping the future of our community. Since my first steps in humanitarian mapping, I’ve seen how HOT is not just a technical platform, but a network of people who believe in collective action, territorial justice, and the power of open data to transform local, regional, and national realities. My participation in mapping projects in both urban and rural contexts has allowed me to understand the challenges and opportunities that communities in our region face. I believe the experience I’ve gained gives me a valuable perspective to contribute to HOT’s strategic decisions. Being part of the Voting Membership is a great responsibility: to uphold a diverse, ethical, and participatory community. I am especially motivated to help more people in Latin America find in HOT a space for learning, impact, and growth—just as it was for me from the very beginning.

How do I plan to participate in HOT as a Voting Member? Are there any working groups you’re interested in?

As a Voting Member, I want to participate actively in building a more inclusive, stronger, and more representative community. I plan to attend assemblies, carefully read and analyze proposals submitted to voting, and ensure that my decisions reflect the needs of the territories and communities I work with—especially in Latin America.

I’m particularly interested in contributing to the following three Working Groups:

1. Community: Because I strongly believe in the value of a global community that empowers local groups and fosters horizontal connections of learning, mutual support, and collaboration.
2. Governance: Because I want to bring a youthful and regional perspective to discussions about organizational structure, participation, and transparency, to help ensure that HOT grows in a fair and democratic way.
3. Training: Because I have personally experienced how access to good training materials can transform the way people engage with OSM and HOT. I want to help create and improve training resources that are accessible, context-aware, and available in multiple languages—especially Spanish.

I’m convinced that my active participation in these spaces can contribute both to capacity building and to strengthening HOT’s institutional development.

What do you think is the greatest challenge HOT faces, and how will you help address it?

One of HOT’s biggest challenges is ensuring equity in participation and the real representation of the geographical and cultural diversity within its community. Although HOT has grown significantly, there are still gaps in access, visibility, and decision-making for many communities in the Global South. To help address this challenge, I will contribute my territorial experience in training, advocacy, and collaboration with social organizations. I will promote the visibility of initiatives led by youth and local communities, and work to ensure that HOT not only supports local processes but also recognizes them as key drivers of strategic decision-making. Inclusion must not only be a value—it must be a daily practice guiding our collective actions.

6 days ago

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.

7 days ago

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.

Additional work included developing thematic maps and platforms for data visualization and download, prioritizing accessible, low-cost tools. I also led project outreach and trained volunteers in using OSM, JOSM, and Mapillary.

Through an institutional agreement between CIDi and KU Leuven (Catholic University of Leuven, Belgium), I supported master’s students in joint activities and academic-technical exchanges. In 2024, I was selected for the YouthMappers Leadership Fellowship in Thailand, where I further strengthened my open mapping and leadership skills.

These experiences have deepened my understanding of the value of open mapping, the importance of interdisciplinary collaboration, and the need to strengthen local and regional capacities.

Why do I want to become a voting member? I hope to bring a practical perspective grounded in the reality of those working with open data in contexts similar to Paraguay. Along this journey, I’ve witnessed how important it is for HOT’s decisions to reflect the real challenges faced by local teams. My goal is to help ensure that the community remains inclusive and that both technical and collaborative efforts translate into useful tools for people managing, planning, or simply trying to better understand their environment.

Main responsibility as a voting member HOT’s strategic decisions must prioritize the practical use and long-term sustainability of open data, ensuring that they remain effective tools for urban management and risk reduction in vulnerable communities.

It is of my interest to contribute to the Community and Training Working Groups, where I can share my experience in technical training, participatory methodologies, and the application of open data in urban and territorial projects.

HOT’s challenge and my contribution One of HOT’s key challenges is ensuring that the open data it generates remains useful and up to date for local teams and decision-makers. From my experience as both architect and mapper, I see three concrete ways to contribute:

Supporting the integration of data into local management: Helping ensure that open mapping outputs are clear and usable for municipal or community-level projects—particularly through basic geospatial analysis and straightforward technical guidance. Facilitating initial technical training: Organizing and supporting workshops, mapathons, and hands-on activities for local teams and new volunteers learning to use tools like OpenStreetMap, QGIS, or web-based map viewers. Documenting accessible workflows: Creating guides and step-by-step documentation for data management and publishing processes, enabling other teams to replicate and adapt them—even without prior experience.

My focus is on ensuring that the information we produce doesn’t get lost, but instead remains available and meaningful for those who need it—empowering others to adopt and apply it in their own contexts.

Thank you for your consideration, Kind regards,

Paula Villar Arch. Paula Villar Duré YouthMappers Volunteer Regional Ambassador | America Faculty of Architecture, Design, and Art | National University of Asunción

8 days ago