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Recent diary entries

Posted by Opie Eke Ogburu on 5 April 2025 in English.

On the 28 of March, I just discovered that our Village is not well represented in the wikipedia map, as well as the article about our community on wikipedia is not comprehensive, as i was researching further about my local community online.

That was the beginning of my journey on openstreetmap, as I’ve decided to become a contributor to help improve the visibility of our community on the world map.

Though I’m starting as a novice as at today been the 4th of April, 2025, I’m determined to walk myself through the process of learning how to edit on open street map. As I’ve started on a self learning steps, I look forward to maybe joining a community of mappers, finding someone as a guide and becoming a full member of openstreetmap community.

Location: Ohafia, Abia State, Nigeria

Геоинформационный портал Калужской области - набор электронных картографических сервисов, обеспечивающих открытый доступ заинтересованным пользователям к массиву пространственных данных нашего региона посредством глобальной сети Интернет. Сссылка

Реестр парковок г. Калуги

Реестр сведений о парковках общего пользования, расположенных на территории муниципального образования “Город Калуга”.

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Комплексная схема организации дорожного движения города Калуги

Содержит перечень дорог с их категорийностью и другими характеристиками (см. файл Отчет КСОДД).

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АО “УКОН”

Информация о городских ярмарках и банях.

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Posted by kumakyoo on 4 April 2025 in English. Last updated on 25 April 2025.

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

 

When relations where introduced (in 2008, if I remember correctly) I was a big fan of them. They sounded great and promising. Meanwhile I think, it was a mistake to add relations, and if I where to decide I would probably remove them from OSM and replace them with something better.

Let’s have a closer look: Nodes and ways (and areas) are simple: A geometry with some properties. Relations do not share this simplicity. They share the properties, but they do not have their own geometry. Instead, they contain references to some elements. This makes things complicated.

I could write several articles about relations and why I think they are a bad idea, but this article is about relations in Oma files, so I’ll leave it at that for now.

 

Multipolygons

Instead, I’m going to take a closer look at what is currently done with relations. According to taginfo, more than half of all relations are multipolygons, that is, a collection of areas. Since we’ve already got areas in Oma files, this is easy to handle: All multipolygons are converted to one or more areas.

See full entry

Posted by Cartografo1968 on 4 April 2025 in Spanish (Español).

En el contexto de una clase de Cartografía Digital que estoy dictando en una institución de educación superior, les mostré OSM a mis alumnos para que sepan de este interesante proyecto que yo conocí el 2019. No me había interesado mapear hasta ahora que vi que falta mucha información y además que la existente contiene muchos errores.

Location: Ñuñoa, Santiago, Provincia de Santiago, Región Metropolitana de Santiago, 8320000, Chile