I want to talk about how to name the trails in Catoctin Mountain Park, a US national park in Maryland. The available information about trail names is a bit inconsistent. This post serves as a way for me to organize my thoughts and document the conclusions I’ve reached.

Background

Catoctin Mountain Park, as I mentioned, is part of the US National Park system. It’s located in Maryland, at the northern end of the Blue Ridge Mountains and the outer perimeter of the Appalachian Mountains. It has a number of hiking trails. The trails are split between the east and west sides of the park; each side’s trails are interconnected, but the two sides don’t connect directly to each other.

I recently hiked most of the east side trails. It’s those trails I’m primarily focused on. I haven’t (yet) been to the west side, so I don’t personally know the ground truth there.

Ground Truth

On the ground, trails are designated by colored blazes on trees. The blazes use a number of different colors and several different shapes. Some distinct trails use the same colors as each other, but use different blaze shapes. There are sections where two trails overlap; those sections uses blazes that are half the color of one trail and half the color of the other trail.

There are no trail names posted, with one exception. A trail between the visitor center and the Lewis Property part of the park is both blazed with white rectangles and has regularly-placed signs saying “Gateway Trail”.

The park generally uses rectangular blazes for longer trails that form the core of the east side’s trail network. Triangular and circular blazes are used for shorter trails that either form shorter connections or have a specific purpose. For example, there’s a short nature trail with signs pointing out local plant species. That trail is blazed with triangles.

… See full entry

🌳 Como mapear uma árvore no iD Editor

1. Acesse o iD Editor Vá para https://lnkd.in/ggMaf_2 Faça login e clique em “Editar” (abre o iD Editor)

2. Adicione um ponto Clique no botão “Ponto” (ícone com um marcador) Clique exatamente onde está a árvore no mapa

3. Classifique como Árvore No painel lateral, digite “Árvore” ou “Tree” Selecione a opção que diz “Árvore” (com a tag natural=tree)

4. Adicione informações (opcional)

Você pode preencher outros detalhes:

species = Nome científico (ex: Mangifera indica)

leaf_type = broadleaved (folhas largas) ou needleleaved (aciculadas)

leaf_cycle = deciduous (caduca) ou evergreen (perene)

height = altura aproximada (ex: 5)

diameter_crown = diâmetro da copa

1. Salve suas edições

Clique em “Salvar” Escreva um resumo como: Adicionei árvore em praça pública

Clique em “Carregar” para enviar a edição OpenStreetMap Umbraosm hashtag#naturaltree hashtag#tag hashtag#id hashtag#editorid

🏘️ Projeto de Inserção Assistida de Edificações no Brasil

O Projeto de Inserção Assistida de Edificações tem como objetivo ampliar significativamente a cobertura de edificações no OpenStreetMap (OSM) em território brasileiro, com foco especial em áreas urbanas ainda pouco mapeadas.

A iniciativa utiliza como base os dados do Google Open Buildings, disponibilizados sob uma licença compatível com a ODbL do OSM, conforme explicitado no site oficial da Google: 🔗 https://sites.research.google/gr/open-buildings/

Desde 2024, o mapeador Santamariense, membro ativo da comunidade OSM Brasil, vem trabalhando na correção e aprimoramento desses dados com o objetivo de adaptá-los às diretrizes da comunidade e garantir sua qualidade. Esse esforço culmina, agora, na proposta oficial à comunidade OSM Brasil, convidando todos os mapeadores a analisarem e participarem do projeto, sugerindo também áreas prioritárias para mapeamento.

… See full entry

SOCIALIZANDO O CONHECIMENTO: CHAMADA PARA MOSTRA DE PROJETOS DE MAPEAMENTO

---

O III Workshop Mapeamento Participativo e Cartografia Social - MPCS 2025, em sua terceira edição, visa reunir pesquisadores de países lusófonos(*), que adotam as metodologias de mapeamento participativo ou colaborativo, além do público interessado.

O evento é uma iniciativa do IVIDES.org, em parceria com o Laboratório de Cartografia - GeoCart-UFRJ. Agradecemos aos parceiros, Laboratório Integrado de Geografia Física Aplicada - LiGA-UFRRJ, Laboratório de Geotecnologias - Lageot-UFF Campos, Associação de Geógrafos Brasileiros - AGB- Seção Campinas/SP, Programa de Pós-graduação em Geografia - PPGG-UFRJ; e pelo patrocínio da FAPERJ e da empresa IVIDES DATA.

---

Página oficial

https://ivides.org/workshopmpcs2025

---

MOSTRA DE PROJETOS

Está sendo organizada uma Mostra de projetos de mapeamento, para apresentação online de projetos individuais (completos ou já com resultados). Para participar, basta preencher o formulário de inscrição até 20 MAIO 2025, informando os dados básicos da submissão.

https://ee.kobotoolbox.org/x/Gn3xTsd8

A equipe entrará em contato adiante, a fim de informar sobre o aceite e alinhar os detalhes. Conheça os critérios de avaliação na página oficial do evento.

Serão emitidos certificados de participação como palestrante para aqueles(as) autores(as) de projetos apresentados. O formulário necessita que autorize o armazenamento de cookies para funcionar a contento.

Para contato, por gentileza, enviar mensagem para: ivides@ivides.org.

(*) Países lusófonos: Angola, Brasil, Cabo Verde, Guiné-Bissau, Guiné Equatorial, Moçambique, Portugal, São Tomé e Príncipe e Timor Leste.

---

… See full entry

Cross-posted from https://odeco-research.eu/?p=4999

On Thursday, the 10th of April 2025, we celebrated the event “OpenStreetMap: Mapping & Hiking” at the University of Camerino, Italy. After two months of preparation, the event was well-received and had a diverse and satisfied crowd.

OpenStreetMap (OSM) is a collaborative geographical database of the world. Millions of people use its data, and also millions contribute to it in various ways. However, there are still places where there is no strong local community, where its villages and rural areas are heavily undermapped. Camerino, while the town itself is well mapped, has some incredible nature and cultural spots nearby, which needed an update. As well, being a university town with students coming from all corners of Italy and the world, makes it a prime location for engaging in outreach activities and kickstarting a community.

… See full entry

How complete are addresses in OpenStreetMap in Belgium? After several status these previous years (see September 2022, in May 2023, and in May 2024, November 24), I finally adapt the process to analyse addresses completeness for all Belgium!

The aim of this small article is to assess the completeness of addresses in Belgium for OSM, compared to official data. Basically we count the address points in OSM and in official data by municipalities. We don’t check the address quality here, we know there can be errors in OSM data, and even in official data.

How I proceeded

Using QGIS, I gathered OSM addresses and official ones. OSM data is imported in a PostgreSQL database using osm2pgsql based on a pbf file for Belgium from the 24th of April. Official data is coming from BEST address csv files, that gathers Belgian addresses for the 3 regions of the country.

Addresses in OSM can be mapped on buildings (most of the cases), hence on a way, or on a node. I consider only objects with the “addr:housenumber” tag. First, I made a single layer of addresses points from OSM data by merging the centroids of buildings with this tag and the points with these tags, by excluding the places where these two layers overlaps (typically points with an address inside a building where there is already an address). The method is far from perfect: I don’t consider relations, I miss some way objects with addresses but without the building tag (typically some schools), and probably a lot of other edge cases due to the “joyeux bordel” of the OSM data model.

Official data considers several address points for each building unit, or box number. It means that there are often several points at the same place, especially in cities, accounting for each box number. Since the mapping of box number is often not so used in OSM, I merged all points at the same place (given a buffer of 1 meter) as a first step. This reduces the number of official address from 7,004,321 to 4,454,017.

… See full entry

A UMBRAOSM está no Mastodon!

Agora a União dos Mapeadores Brasileiros do OpenStreetMap (UMBRAOSM) também faz parte do Mastodon, a rede social livre e descentralizada! A comunidade OpenStreetMap em todo o mundo utiliza o Mastodon para compartilhar atualizações, divulgar eventos, projetos de mapeamento e trocar experiências.

Siga a UMBRAOSM e fique por dentro das novidades do mapeamento colaborativo brasileiro!

Acesse: https://en.osm.town/@umbraosm

Ich haben einen Track hochgeladen. Der Import hat geklappt steht in der Bestätigungs-email und bei meinen Tracks wird angezeigt:

” 2025_04_27_2195689183_bsjw_all_tracks_openmaps.gpx.gz 5330 Punkte IDENTIFIZIERBAR

vor 16 Minuten von angela_bsjw

Braunschweiger Jakobsweg ist ein Pilgerweg. Er beginnt in Magdeburg am Dom. Dort zweigt er vom Jakobusweg Sachsen-Anhalt ab. In Hildesheim-Marienrode trifft er auf den Jakobsweg Via Scandinavica und endet nach 275 km am Kloster/Schloß Corvey bei Höxter . “

Aber der Track wird in der Karte nicht angezeigt. Was ist falsch??

EN version below

Ce post a été initialement publié ici.

Le 14 décembre 2024, Mayotte était frappée par le cyclone Chido, le plus violent qu’elle ait connu depuis plus de 50 ans. Rapidement, l’IGN a diffusé des imageries Pléiades prises les 17, 18, 20, 21 et 24 décembre et a confirmé le 25 décembre que la communauté OSM pouvaient les utiliser comme source dans ses éditions. De suite, j’ai eu l’envie de les utiliser pour évaluer les dommages du bâti. Pourquoi le bâti ? Du point de vue cartographique, parce que les dommages sont plus visibles sur des infrastructures polygonales que ponctuelles ou linéaires. Du point de vue de la réponse de crise, parce que les dégâts étaient particulièrement importants, ayant fait disparaître ou rendu impraticables les foyers de beaucoup d’habitants.

Trois mois après, ce billet revient sur les grandes étapes de cette cartographie toujours en cours, organisée bénévolement sur du temps libre.

Revue et choix méthodologique

La cartographie des dommages du bâti à l’aide d’imagerie post-désastre n’a évidemment pas été inventée dans OpenStreetMap et des expériences similaires ont déjà été menées par le passé dans OSM.

Après le passage du cyclone Haiyan sur les Philippines en novembre 2013, une cartographie des dommages du bâti avait été réalisée sur la région autour de Tacloban. Par ailleurs, des chercheurs du Harvard Humanitarian Initiative (HHI) avaient publié en mars 2016 un article détaillant une méthodologie qui avait été de suite adaptée à OSM sous la forme de modèles de préréglages et d’un style cartographique pour JOSM, et appliqués notamment à Haïti après le passage du cyclone Mathieu en octobre 2016.

… See full entry

OpenStreetMap Indonesia, in partnership with TomTom, organised a Community Mapping Party at GoWork Plaza Indonesia in Jakarta on Saturday, 26 April 2025.

---

Planning

January 23, 2025 – 17:05 WIB

“For those living in the Jabotabek area, how about we hold our first offline monthly talk next time and align it with the TomTom Mapping Party event?”

Initial discussions about hosting an offline gathering began among members in the Greater Jakarta area. A suggestion was made to align the monthly community meeting (usually held online, but in this proposal, it will be held offline for the first time) with an upcoming Mapping Party event organized by TomTom. The idea was presented in an open-ended way, inviting members to consider the possibility when time allowed.

January 30, 2025 – 08:34 WIB

“It might be better to hold it before Ramadan.”

The conversation picked up pace, with another participant suggesting that it would be preferable to hold the event before the fasting month (Ramadan) began. The comment hinted at the logistical advantages of scheduling it earlier.

February 3, 2025 – 11:01 WIB

“If it is held before Ramadan, preparation time would be very tight. It has been proposed to schedule it after Eid, possibly in mid or late April, and a response is still awaited.”

It was mentioned that holding the event before Ramadan might be too rushed given the short preparation time. As a result, a new proposal was introduced: to hold the Mapping Party after the Eid al-Fitr holiday, possibly in mid to late April. Final confirmation was still pending at that point.

March 23, 2025 – 14:28 WIB

“If we hold an offline mapping party and meetup at the end of April 2025 somewhere around Jabodetabek, would participants be able to attend?”

… See full entry

I have added a pin for my house, which is at 38150 N Vista Dr in Livonia! From here, I have encountered tons of wildlife, including fish, and generally been treated pretty well. There are parks nearby, riparian zones, old-growth forests, modern civilization including a hotel with swimming pool, and plenty of transportation opportunities. You can even walk here. There’s water, a lawn, and interesting people here. My basement is the coolest!

UMBRAOSM: A União dos Mapeadores Brasileiros do OpenStreetMap

A União dos Mapeadores Brasileiros do OpenStreetMap (UMBRAOSM) é uma organização comunitária que reúne voluntários de todo o Brasil comprometidos com o mapeamento colaborativo, livre e aberto. Nascida da paixão de diversos mapeadores pela construção coletiva do conhecimento geográfico, a UMBRAOSM tem como missão fortalecer a presença do OpenStreetMap (OSM) no Brasil e fomentar práticas de mapeamento inclusivas, acessíveis e de alta qualidade.

O que é o OpenStreetMap?

O OpenStreetMap é um projeto colaborativo que visa criar um mapa mundial livre, editado por qualquer pessoa, a qualquer momento. Ele é usado por milhões de pessoas, empresas, organizações humanitárias e governos que necessitam de dados geoespaciais atualizados e abertos.

No Brasil, o OSM desempenha um papel vital no apoio a ações de emergência, planejamento urbano, pesquisas acadêmicas, projetos ambientais e iniciativas sociais.

A Origem da UMBRAOSM

… See full entry

Piraha

https://overpass-turbo.eu/index.html?Q=%5Bout%3Ajson%5D%5Btimeout%3A25%5D%3B%0A%28%0A%20%20nwr%5B%22highway%22%7E%22%5E%28motorway%7Ctrunk%7Cprimary%7Csecondary%7Cunclassified%7Ctertiary%7Cresidential%29%24%22%5D%0A%20%20%20%20%5B%21%22sidewalk%22%5D%0A%20%20%20%20%5B%21%22sidewalk%3Aboth%22%5D%0A%20%20%20%20%5B%21%22sidewalk%3Aleft%22%5D%0A%20%20%20%20%5B%21%22sidewalk%3Aright%22%5D%0A%20%20%20%20%28%7B%7Bbbox%7D%7D%29%3B%0A%29%3B%0Aout%20body%3B%0A%3E%3B%0Aout%20skel%20qt%3B&C=37.315021%3B-122.0648%3B14

Por que usar ferramentas de mapeamento colaborativo como o OpenStreetMap?

Uma visão da UMBRAOSM – União dos Mapeadores Brasileiros do OpenStreetMap

Em um país com dimensões continentais como o Brasil, o acesso a informações geográficas abertas, atualizadas e confiáveis é essencial para promover o desenvolvimento social, a inclusão territorial e a justiça espacial. Nesse contexto, a UMBRAOSM acredita no poder transformador das ferramentas de mapeamento colaborativo, especialmente o OpenStreetMap (OSM) — o mapa livre do mundo.

Desde sua criação, a UMBRAOSM atua para fortalecer a cultura cartográfica aberta e inclusiva no Brasil, promovendo oficinas, capacitações, eventos e ações comunitárias em diversas regiões. Neste artigo, explicamos por que o uso do OpenStreetMap é uma escolha estratégica para indivíduos, coletivos, instituições públicas e privadas. O que é o OpenStreetMap?

… See full entry

🇧🇷 UMBraOSM – União dos Mapeadores Brasileiros do OpenStreetMap

A UMBraOSM é a associação brasileira que reúne pessoas apaixonadas por mapas livres e colaborativos, com base no projeto OpenStreetMap (OSM) — o “Wikipedia dos mapas”.

Criada por e para mapeadores, a UMBraOSM promove:

🗺 Mapeamento colaborativo em todo o Brasil

👥 Formação de comunidades locais e temáticas

📚 Cursos, eventos e oficinas sobre cartografia livre

🤝 Parcerias com escolas, universidades, ONGs e governos

🌍 Defesa do conhecimento livre e da soberania dos dados geográficos

A associação foi registrada oficialmente em 2023 e tem como missão fortalecer a cultura do mapeamento aberto no Brasil, conectando pessoas, causas e territórios.

Se você acredita no poder dos mapas feitos por e para as pessoas, a UMBraOSM é o seu lugar!

🔗 Junte-se à gente no Telegram: https://t.me/grupoumbraosm

UMBraOSM #OpenStreetMap #MapeamentoColaborativo #DadosAbertos #GeografiaLivre #CartografiaColaborativa

This blog post is part of a series of blog posts about the new OSM file format “OMA”. This is the last post. At the end of the article you’ll find links to the other blog entries.

 

I will end this series of blog posts about the OMA file format with a short summary of all the feedback I have received and a brief outlook. But first I’d like to give you a real-life example that uses OMA files.

 

A Real-Life Example

Over a year ago I wrote a renderer suitable for displaying micromapped areas. I used it to generate tiles at zoom level 20 for the restricted area of my micromapping project.

Now I have adapted this program to use OMA files and recomputed the tiles for the area of my micromapping project. The program can be found on GitHub; and there’s a slippy map showing the tiles.

For example, this is what the station forecourt of Hilden looks like:

 

Summary

… See full entry

Opis projekta

S obzirom na infrastrukturne projekte u centru Rijeci i široj okolici te nedostatku određenog broja podataka, provodi se opsežno uređenje postojećih te nadodavanje novih podataka na temelju dostupnih podataka.

• Status: u tijeku
• Grad: Rijeka
• Obuhvaćeno područje: Rijeka (administrativna područja grada Rijeke)
• Početak: 20.3..2025.
• Planirani završetak: 15.10.2025.
• Završetak:

Projekt uređenja šireg centra Rijeke obuhvaća uređenje postojećih javnih površina i trgova, uređenje zelenih površina i parkova, nogostupa, drvoreda i parkirališnih područja. Uz prateće sadržaje, poput pješačkih staza i ulica, uređuju se nazivi ulica, uređuje i dodaje urbana oprema te uređuju svi podaci u širem centru kako bi isti bili u skladu sa trenutnim stanjem na terenu.

Naglasak je stavljen na uređene zelenih područja u centru grada, što podrazumijeva dodavanje urbane opreme, važeva za cvijeće, ukrasnih vaza, klupa, javne rasvjete, dječja igralište te ostalu urbanu u svrhu poboljšanja životnih uvjeta za mlade i ostale građane. Trenutne informacije ne pokazuju postojanje zelenih područja u centru Rijeke, što se planira izmijeniti i prilagoditi.

Projektom su obuhvaćeni:

• Parkirališta javne namjene (podzemne garaže i nadzemna parkirališta bez i sa naplatom parkirališta)
• Parkovi i zelene površine (igrališta, tereni, travnjaci)
• Dječja igrališta, područja škola i vrtića te ostali sportski objekti
• Javne površine (pješačke state i ulice)
• Cestovna oprema (imena i nazivi te prozetanje ulica i pristupnih cesta)
• Urbana oprema (nadzorne kamere, pješački i prometni otoci, stajališta javnog prijevoza, košarice za otpad i sl.)
• Drvoredi (ukrasna stabla)
• Autobusni terminali
• Željezničke postaje i kolodvori

Izvori podataka

Za potrebe ažuriranja podataka koristi se ortofoto dostupan u objavi svake promjene, GIS portal Grada Rijeke te ostali servisi javnih podataka i fotografije iz osobne arhive.

Provedene izmjene

… See full entry

Hello, I have completed work for the first part of the project. Central Wilson and the length of Fish Creek road have reached a point where roads, driveways, structures, and water features have been thoroughly digitized. Check it out and let me know what you think! :) I am sure there are some things I’ve overlooked and maybe some mistakes in these areas. However, given that they are seeing a fair amount of development, I will likely be returning to them soon to update and double check for possible mistakes. I do have a question for you all out there, more experienced than me. I have come to despise the existing residential-landuse areas in Wilson. They are a mess and seem to be quite outdated. I would be more than willing to fix or make new ones, but I don’t know if there is a specific way to go about that kind of thing. Do they need to be based on any administrative boundaries or are they a more arbitrary area? As for what’s next in the project, I am moving east to the Stilson area to fill in completely missing neighborhoods, improve roads, add water features, etc. I will give the next update once completed.

CPA