Recent diary entries
It gives me great pleasure to announce that the OpenStreetMap website now has a context menu! Also known as a right-click menu:
Yesterday was a great day as I had chance to be a part of the mapping work shop held in Uganda Christian University Mbale, Uganda. We had a chance to be reminded of the good mapping practices and tips and also introduced to validation. it was a great excitement to us all learning how to validate and giving feedback to people who mapped the tasks. All thanks to Mr. Kateregga Geoffrey for the great work done.
pub: 3250 vs. place_of_worship: 3476
pub: 4858 vs. place_of_worship: 6372
pub: 3963 vs. place_of_worship: 7625
pub: 686 vs. place_of_worship: 5259
pub: 129298 vs. place_of_worship: 843735
I've just written to the UK and London mailing lists, suggesting a bulk edit to fix the outdated "network=Barclays Cycle Hire" in London. Harry proposed this 1 year ago.
Happy Cow is a website listing food places that vegetarians and vegans can use. The site has been going since 1999 and seems pretty well-established. I've proposed a tag for cross-referencing against Happy Cow.
September 21 2016 saw me receive the chilling news about The Chancel Tax.
Throughout the rest of September & October I kept my head down & mapped to the West then North. By 23 November it was Arnold Lane outside Scot Grave Farm heading south-east and suddenly we caught a distant view of the church again:-
All my mapping was now heading towards the church, and by December, then 2017, there were constant opportunities for closer & closer views of the church:
February 13, Arnold Lane 1:
Stumbled upon this mistakenly dragged node thats been hanging around Sheffield for the last two months. Considering its not fixed despite having a highly active mapping community, wonder if some tooling could have helped flagged this to local mappers sooner.
Ideas on how to prevent such edits in future? Any existing QA tools that highlight this?
These days, every ski enthusiast keeps an eye on St. Moritz (Switzerland), the host of the Alpine World Ski Championship 2017. As ski and map enthusiast, one of my eyes is always on skiing while the other is on mapping as well, more specifically on community mapping with OpenStreetMap. While watching ski races on TV, I had the idea for taking a closer look at skiing-related features in OpenStreetMap, in particular on the St. Moritz resort, but also skiing resorts worldwide. In this blog post, I conduct an analysis on OpenStreetMap features related to alpine skiing, revealing the evolution of aerial lifts and ski pistes. Following the spirit of the ski world championship, I award gold, silver and bronze medals to outstanding OSM contributors.
Pistes and aerial lifts at the Corviglia-Marguns-Piz Nair winter sports resort at St. Moritz, Switzerland, host of the 2017 Alpine Ski World Championship (WC) (Map data and background: © OpenStreetMap contributors; yellow area indicates WC race pistes)
në këtë postim do mundohem të paraqes gjëndjen aktuale të osm-mapping të qytetit (+rrethina) të Tiranës. Gjithashtu, ky postim mund të përdoret edhe për ndryshimet e kategorive të ndryshme që mund të bëhen si plankategori të kartografisë në hapat e mëtejshëm.
Përshkrimi i kategorive të mëposhtme:
highways (pothuajse është në versionin e parë të përfundimit total)
places (pjesërisht; mungojnë shumë emërtime)
emergency (pjesërisht; mungojnë shumë emërtime)
- ambulance station
amenity (pjesërisht; mungojnë shumë emërtime dhe ato aktualet duhen verifikuar)
- education (school, college, kindergarden, university, library, etj)
- healthcare (hospital, pharmacy, social facility, veterinary, dentist, doctors, clinic, etj)
- financial (bank, atm)
- art centre
- social centre
- community centre
- bus station
- bus terminal
- bicycle parking
- bicycle station
- bicycle rental
leisure (ka pak POI's, point of interest, megjithëse shtohen pothuajse çdo ditë)
- për emërtimet e tyre po vendos një link
tourism (pjesërisht; për ato ekzistueset mungojnë informacione të sakta dhe verifikimi i tyre!!!)
- camp site
- me këtë kategori për mendimin tim mund të vazhdohet kur ka një infrastrukturë të rregullt rrugore me emërtimet e rrugëve
- sistemi i adresave është problem në vehte që ndoshta duhet diskutuar më vonë
Kategoria "highway" pothuajse është në përfundim e sipër. Ka disa muaj që merrem me të dhe mungon vetëm proçesi "fine tunning" me disa verifikime aktuale në terren, veçanërisht kryqëzimet e mëdha (së bashku me footway, pedestrian crossing, traffic signal, etj). Dhe ky proçes është në punë intensive.
Kam renditur kategoritë sipas rëndësisë së tyre për gjendjen aktuale që gjendet harta e Tiranës.
Mendoj që ky përshkrim të shërbej edhe si orientues i proçesit të kartografimit të OSM-Tirana.
Map Features mund ti gjeni këtu.
(diskutim i hapur)
Hallo zusammen, ich bin auf der Suche nach einem GPS Gerät. Aktuell schwebt mir das Garmin Oregon 600 (das erste in der Tabelle http://gps-check.de/fahrrad-navi-test/ ) vor Augen. Hat damit jemand Erfahrungen? :)
No, seriously, c'mon!
I had to check on OSM.org to see if my Opensnowmap has a problem. No, it's perfectly fine. But fine for who ?
It's not like there is no mapper in the US, as at least one of them made something like this a very long time ago (6 years). Is there anybody in the US using OSM? Is there any US-based company using OSM? It seems a bit stupid to do so at first sight, isn't it?
It's almost easy, and definitely fun if you have an hour or so to tinker. ;)
I've been trying to look for a mapping activity for kids 6-12, and I remembered a project I saw in an OSM blog 0, and thought I'd try it out.
This is better suited for 11+ years old, including some adults. Maybe.
H/T to smaprs.
Note to self: a bigger paper could make this a lot easier.
The Caribbean Sea is seen in the imagination of most people as an area of clear waters, paradise islands, and peaceful beaches. In the best of the instances, it is also seen as the land of dwarf mangroves border-lining creeks on coral islands.
However, the Souhtern-most tip of the Caribbean Sea located in Colombia close to the border with Panama is a different story. This location is known in world maps as the Urabá Gulf or the Darién Gulf. It is a U-shape entrance of the sea into South America formed by the clash of the tectonic plates of the Caribbean, Nazca and the Pacific. Such a geological activity gave rise to the Isthmus of Panamá and created a fracture in a North-South direction that formed the main axis of the Urabá Gulf. Therefore, this gulf is surrounded by two main coastal ridges: the Serranía del Darién to the West and the Serranía de Abibe to the East. Both mark the limits of the geological plates, the Isthmus (or Meso America) and South America, respectively.
Such an impressive geological history not only formed a coastline with a distinctive landscape from the rest of the Caribbean in the neighboring areas: Panama and Colombia.
It also promote a major change in the hydrology of an ancient river, the Atrato. Being formed in the upper part of the Western Cordillera of Colombia in the Pacific side of South America, one of the rainiest places on Earth (annual rainfall: >8 meters!), the Atrato river drains a world-class discharge. Such discharge once ran to the Pacific before of the closure of the Panama Isthmus. But nearly 3 million years ago the course of this magnificent river was diverted to the North and ended discharging into the Urabá Gulf, now the Southern-most end of the Caribbean Sea.
The change promoted the mangroves to flourish and growth to a point not seen in the Caribbean coast of Panama and Colombia.
This unique land has been subject of a mapping effort aimed at understanding its biogeographic features and history.
After a decade of scientific exploration, my research group is moving from the fields of coastal ecology, landscape ecology and biogeography, to coastal zone and urban planning, as well as to sustainability of coastal livelihoods.
Mapping human settlements and using open source data has become a priority for us. In the following link the reader and mapper will see the evidence of both the wilderness of the area and the human threats to them:
The rest of the world deserves to know and the local livelihoods need the support to prevent destruction of this natural heritage and better-planning of urban settlement. Open source data seem to me an answer to both task.
Today, I commit myself to provide high-resolution data for mapping for humanitarian projects.
Welcome to the Southern Caribbean.
Juan F. Blanco-Libreros, MangleBlanco
ich brauche einen Kartenausschnitt - Landkarte mit Spanien, Südfrankreich, Italien. - Größere Städte sollten eingezeichnet sein. - Wenn möglich in ansprechender Farbgebung - Es sollte eine PDF Datei sein - die man ausdrucken kann.
In diese Karte möchte ich Routen einzeichnen und präsentieren.
Wer kann mir bei der Erstellung helfen? Danke schon mal vorab!
Last December I wrote about Phoenix Farm, Gedling, a farm with a direct connection to JRR Tolkien & his most famous book Lord of the Rings. There are a dozen pubs, churches, streets, etc. in Gedling named after this farm + an electoral ward; naturally, the farm itself was knocked down in 1954, and the residential estate named after it was built on it's ashes.
As best as I can tell, this set of garages were built on the site of the farm buildings:-
I've been trying to chase some mapping for this farm for some time, and last Monday mapped Arnold Lane opposite Jessops Lane, where the Farm was supposed to be. It seems that Phoenix Farm (and also Manor Farm, which was on the Jessops Lane side of the road) were originally part of the Manvers Estate (Earls Manvers & Kingston, Duke Kingston & the Marquess of Dorchester; we are talking about the de Manvers and Pierrepont family, those sort of folks). The family began selling some of their estate in the late nineteenth and early twentieth centuries (income from rents had crashed); title deeds for properties in Gedling, Carlton and Stoke Bardolph are held by Nottingham University under the reference Ma 3001-5876. I'm waiting for the University to get back to me to be able to view those deeds.
Today Chris Russell, Spatial Data Manager at Gedling District Council, phoned me back after my email was passed to him by Mike Avery, manager at the Planning Department. Chris had access to the detailed Ordnance Survey (OS) mapping, including all historical mapping, and after much conversation & guidance was finally able to tell me that he had been able to locate the farm, but in that name only in 1950 (actually 1952 - see comments). Manor Farm was opposite Phoenix Farm on the other side of the road. And no, none of that mapping could be offered to me due to the OS copyright.
I went on a school trip in my youth to Holland. We were shown a medieval prison. The guide pointed out that the prison was on the first floor, and that some prisoners were routinely starved of food as a form of torture. On the ground floor was the cookhouse — deliberately, so that cooking smells would rise up through the prison & cause their suffering to become more exquisite. After Chris Russell's conversation I knew a little more of how those poor folks in the prison felt. Here's the smell of the info, but you can't have it.
Thurs 16 February: Document Discovery Booked for Monday
The University got in touch & I've arranged to travel to them on Monday next, 20 February (the facility is King's Meadow Campus Nottingham University, Lenton Lane).
Several people have written on the subject before: when you look at something like the evolution of road network length in OSM, the shape of the curve can tell you something about how complete the network is (on the condition that there are enough local mappers).
This graph shows this evolution for the main roads in Flanders.
You can clearly see that the larger roads were mapped faster than the smaller roads. (note: there is a bug in the OSM-history-importer which prevents deleted objects from being removed from a snapshot. This could explain the continued slight growth of main roads. When people improve roads, they will often delete small portions of them.)
Assuming they are all kind of complete now, you can show the evolution of length as a percentage of current length. This shows quite clearly that there are "mapping priorities": the 60% completion mark comes much sooner for motorways then it does for tertiaries.
While this all sounds quite obvious, it really isn't if you look at the map of road evolution in Flanders. From the very beginning of mapping, contributors have been interested in small roads as well as main roads.
Full size link. Colors: black: main roads, yellow: minor roads, green: slow roads.
If we extend our view to a wider range of roads, we can see that the main roads in general got mapped first, but minor roads soon came to dominate over them. Service roads, tracks and paths (footway, path, steps, bridleway, pedestrian) tell their own story.
(Note: construction and proposed roads are removed from further graphs. I checked taginfo for alternative tagging styles, but they are also quite rare)
Because these last types of roads haven't reached their final form yet, we'll show the yearly growth rate. As this growth was explosive in the first years, we'll start in 2012.
The graph clearly shows that main roads and minor roads aren't really growing anymore. However, the graphs for service roads, paths and tracks seem to level off in 2014. In fact, paths and tracks go up in 2016. In turn, that means there is a lot of mapping left to do. It is surprising to me that this holds for tracks too, as they can be mapped more easily from aerial imagery only. Open data sources of paths and high resolution aerial imagery (both provided by AGIV) could explain the upshot in the mapping of paths and tracks. Other explanations might be succesful relations with the GR and Trage Wegen organisations, or increased contribution triggered by data use.
Network growth versus amount of work
One more thing I do want to share now is the amount of work that is being done. While network completeness was achieved quite fast for main roads, that does not mean that people stopped caring after it was finished. In the animated map or primaries, trunks and motorways below, gray means "existing" and black means "been worked on this month".
These edits can be anything, but here are two examples: work on naming roads and on speed limits. From the beginning of the project, most residential roads were mapped with a name. Length of unnamed residentials started decreasing as soon as 2012. It will likely never reach zero, as many small bits and pieces are hard to assign to any one street. Also, there are in fact roads that do not have a name.
For speed limits, the proportion that has a limit is much lower. Total length of untagged roads only started decreasing in 2014. This tagging is probably slower because it isn't as important for routing and is sometimes seen as a consequence of road classification and location.
These graphs compare the added length for main road types (right) and the number of edits by road type (left). It is quite clear that mapping new roads peaked as early as 2008, but the amount of work done on these roads has in fact only gone up until 2014.
(Note: here, the number of edits is the sum of the number of days a certain way has been edited. The category in which it shows is the last main tag for that day.)
These two graphs show the type of changes for primary and tertiary roads. Traditionally, geometry changes are the most important. As time goes by, their importance starts to lower, and editing tags becomes more important.
In a more general sense, this holds true too. The amount of edits peaks much later than the adding of new roads. In fact, for most road types, it doesn't seem to go down at all.
As usual, I'm torn between answering more and more questions with the data, or scaling it up to more areas. Luckily, for your basic statistics needs, more and more options are finally popping up. See the road statistics provided by Mapbox, Steve Coast or the Missing Maps.
In the case of road network completeness, some efforts have been made to compare current OSM length to CIA stats to measure map completeness. This is problematic, because even if governments have decent stats, they are by their own local definition. Hence the comparison might be off. In the case of Flanders, we have a single, very good source for road lengths. One of the things I want to do next, is to compare local lengths in OSM and official data. This could show is where OSM is probably not finished yet. But you can also calculate this based on the shape of the curves we've seen before. If both approaches give similar results, that would clearly imply that you do not need external datasources to evaluate OSM data completeness.
Another thing is that we have noticed many new mappers first starting to map local paths. I'd like to see if this is a real evolution.
By focusing on road length, you measure both network completeness and level of detail. But neither very well. From a perspective of network completeness, you would have to discount things like cycleways that are mapped as separate ways, or only count dual carriageways once. An analysis detecting really new geometries would do that. I'm planning to do something like that "soon". On the other hand, from a perspective of level of detail road length lacks subtlety. Take the example of cycleway networks. You would have to count all highway=cycleway, but also all the roads that have cycleway tags as part of the cycle network too.
But I told myself not to write articles that are too long to read in one go :) I might have failed.
Bonus: more animated maps
Because they are fun to make and to watch, here are some more animated maps.
Overlaying OSM on top of official road data (Wegenregister), to show where the map is complete
Focusing on "slow roads" (in green)
All data in this article copyright OpenStreetMap contributors, free to reproduce anywhere if source included. Download processed data here.
He comenzado a mapear huertos urbanos en la ciudad de Málaga. Hasta ahora no existía información relativa a este tipo de huertos en la base de datos de OpenStreetMap, no al menos para Málaga. También he creado una sección en la página del wiki donde recopilar información sobre huertos urbanos, de ocio o comunitarios existentes en el municipio.