Recent diary entries
По результатам правок я стал Синьером :)
La verdad que nuna pensé que había que leer tanto para hacer las cosas correctamente. Pero incluso cuando vuelves a leer y empiezas a interpretar te das cuenta que puedes mejorar lo que has hecho.
The most common error we end up doing while splitting well-mapped roads in highly mapped areas is breaking a route relation. This usually involves breaking the continuity of a bus or highway route due to missing members. The community has reported broke route relations while the data team was trying to improve navigation features (Turn lanes & turn restrictions) in US cities. On thorough research found some points to share with you all and hope this helps in solving route relations breakages in future.
The first thing to note, there is nothing wrong with any of the split way or knife-tool that we use to split the road. In general, route relations are very long and spreads across the city. When two or more persons work at the same time, on editing roads part of the same route relation, JOSM will throw relation edit conflict. This conflict is very specific on which version of the edit to keep and which one to remove. In general, people tend to resolve the conflict by pushing their edits and skipping the other's edits. This causes the route relation breakage. Let me explain clearly with examples.
For this use case, I took a bus route (Relation: 333P) in Bangalore, India and tried to download the data into JOSM at two corners of the route into two different layers (layer-1 & layer-2). Now the route relation 333P has 89 members at version-61.
Route Relation: 333P in Bangalore with the location of road to split in layer-1 and layer-2
- In layer-1 the road with route relation 333P is split at any node and uploaded to OSM. This will split the road into two segments, one with version 1 and other will continue with version n+1. As one road is split into two roads, JOSM will also add the new road segment into relation. Now we have 90 members in the relation and version is increased to 62.
- Lets shift to layer-2 which is still in Version 61 & 89 members. Split a different road with route relation 333P into two segments. While uploading the data to OSM a conflict dialog box pops up with 1 conflict.
The OSM server rejects the upload since it has a newer version of the relation
- We now need to merge the server version 62 with our version 61 before it can be uploaded to the server. In the resolve conflicts tab I selected my version of the relation to use for the merged result.
Current version (my edits) and OSM version in Resolve conflict tab
After pushing my current edits without considering the other version in OSM
- Due to this, the JOSM will only keep the members that are split in layer-2 to the route relation 333P and remove one member (the road segment with version 1) that is added in layer-1 from the route relation. This will cause the route relation to break.
How to avoid route relation breakages?
- To avoid breaking the continuity in the relation, it is necessary to include the new members from both versions in the merged relation
- Like previously, while resolving conflict in layer-2 and once we choose our version in Resolve conflicts window, JOSM will automatically freeze any more edits. But we still need to add the missing member from layer-1.
- Now by clicking Unfreeze option at the bottom of the dialog allows us to continue to make changes to the merged version
- Now the important part - Find the new member in the relation member list from the server version (Their version). The conflict dialog will highlight this is red to indicate that it is only present in this list. Select this member and add it to the merged version of the relation.
- Now all the missing members are added to the relation. Click on Freeze → Apply Resolution → Upload to OSM. Check if the relation has any breakages (It should not anymore 😉)
Resolving relation conflicts can be challenging since it can be difficult to get the context of the edit in a list of object id’s. If JOSM can be intelligent enough to preserve the continuity of a relation over conflicting edits, then it can identify the missing member and add it to the relation without causing the relation to break. Want your ideas on how we can resolve this issue following much simpler approach.
This is one case I came across and there might be many of such cases where even inexperienced mappers may be unknowingly breaking relations if they are not familiar with proper conflict resolution. Please feel free to post your thoughts on this and share any easier workflow you may have to resolve such conflicts.
P.S. Always before uploading modified data into OSM check for their updates on OSM just by pressing
⌘+U for MAC,
cntrl + U for Windows and Linux users (
Update data) 🖐️
I just finished reading Side-by-side images expose a glitch in Google’s maps which highlights some shortcomings of Google Maps (GM), which the writer call as "glitches".
I find that amusing because I often hear the same assertions against OSM. Immediately, I wondered how the OSM community is faring in those same areas:
Morro dos Prazeres
Nomgon, Ömnögovi Province, Gobi
So, is OSM, at large - and in those specific areas, doing any better than GM, right now? No, not really. Not yet.
We all know that it's the local community that makes the real difference, and it's unlikely there's any active ones there, hence the very bare coverage.
In the long run, as soon as these areas do get better data, the Open nature of the data license provided by OSM makes it superior to what GM may offer.
While the article decries about the lack of data, and call these communities "invisible" from GM (and their end-users.) The writer may not have known why OSM is the platform of choice by many humanitarian organizations.
When communities recognize the need to become "visible" by being depicted in public maps, to have a voice in governance, they are very welcome to do so in OSM. The community mapping efforts of the Kibera project in Nairobi, Kenya, its empowerment of the community that's called the largest slum in Africa proves that. And that effort is happening in many nooks and corners all over the world. External actors could introduce OSM mapping, but it can only be sustained by an active community of contributors and end-users.
Kibera - from blank spot, to one of the most densest mapped neighbourhoods in OSM today. © 2017 © OpenStreetMap.org contributors
As a commercial enterprise, GM cannot be faulted for their underlying (commercial) reasons for doing things.
In OSM, I'd like to think we map simply because we can.
need to update Woodmoor new subdivision community with street name Dunes Lake Lane 80132
Waymarked Trails is the map for all things route - hiking, cycling, skating and horse riding. It has been a long standing wish of many users to have hillshading and contours on the map. So last week the site has received a new feature that allows you to choose a different base map. The first addition to the available base layers is OpenTopoMap, a beautiful map crafted in spirit of German topological maps. To try it out, go to the settings menu (the little cockwheel on the bottom of the page) and choose the new base map from the drop down menu.
Many thanks to the friendly folks from OpenTopoMap for all their work creating the map and for allowing Waymarked Trails to offer it as a base layer.
Thirumala Temple in Harapanahalli, photo taken from: http://www.tripmondo.com/india/karnataka/mattihalli/
Harapanahalli, is a Taluk of Davanagere, Karnataka. This place is very commercial and has more schools and colleges than other taluks in Davanagere. A Hindu festival “Thirumala Jathre” takes place every year in the temple in Thirumalapura (2 km from Harapanahalli) which is in the image above. The people of all castes participate in the festivities by making Pooja(praying) in the temple, they celebrate this festival grandly.
When I started contributing to OSM 8 months ago, there were less than 10 roads traced in this town. Then, I started mapping and covered most of the town through my local knowledge. I mapped my home in OSM and happy to see that reflected in the map. I mapped my childhood memories, schools, colleges, residential roads, etc. I have added major POIs like schools, colleges, banks, ATMs, cafe shops. But still there are many more POIs and amenities to map and I will continue adding more. I learned mapping by watching a lot YouTube videos, there are more than 100 to choose from! Here’s one of my favorite made by fellow mapper Jef Haack.
I used to check Mapbox blog to learn mapping which contains good articles and GIFs. Anyone can learn mapping through these easily and can start contributing to OSM like I did. You can view the place in OSM. The screenshot of Harapanahalli which I have mapped is below.
Screenshot of my hometown on OSM
Die schlechte Nachricht: Nein, ist es nicht.
Die gute Nachricht: Es gibt nur zwei Sorten.
Schon einige Male stand ich mit meinem autogasgetriebenen Fahrzeug vor einer Tankstelle, die zwar Erdgas feilbot, aber damit kann mein Vehikel nichts anfangen. Ein Mapper kannte wohl die feinen Unterschiede nicht und hatte das Gasangebot als fuel:lpg=yes drangetaggt. Kann passieren.
Dabei ist es praktisch, Spritsorten zu erfassen. OsmAnd zum Beispiel kann diese Tags auswerten und etwa gezielt Autogastankstellen als POIs auf der Karte hervorheben. Daher danke fürs Lesen, und noch mehr fürs Mappen :-)
Damit es seltener zu Verwechslungen kommt, mal eine kurze Klärung der beiden unterschiedlichen Gaskraftstoffe:
Bezeichnungen: Autogas, LPG, GPL, Propan …
Autogas ist chemisch eine Propan-Butan-Mischung in unterschiedlicher Zusammensetzung, mehr oder weniger identisch mit dem Zeug im Campingkocher oder im Feuerzeug. Es hat mehrere angenehme Eigenarten. Erstens verbrennt es sehr schadstoffarm und erzeugt vor allem fast keinen Feinstaub, zweitens ist es schon bei relativ geringem Druck (5 bis 8 bar) dauerhaft flüssig (daher der Name „Flüssiggas“, einklich ein Oxymoron). Der Witz: In flüssigem Zustand bekommt man viel mehr davon in den Tank als in gasförmigem, denn eine Flüssigkeit ist, verglichen mit einem Gas, maximal dicht gepackt. Getankt wird über einen einfachen Druckanschluss, für den es allerdings verschiedene Ausführungen gibt, so dass man halt den richtigen Adapter dabei haben muss (national sind die zum Glück größtenteils gleich), abgerechnet wird nach Liter.
Es gibt etliche Tankstellen, die ausschließlich Autogas anbieten (vor allem bei Autohäusern oder Gashändlern). Da hier bei Undichtigkeiten nichts im Boden versickert, sondern alles, was eventuell austritt, sofort verdampft, sind keine Bodenabdichtungen erforderlich; man muss nur einen großen Tank mit Zapfsäule und Bezahlautomat auf den Platz stellen, fertig ist die Tankstelle.
Englisch heißt das Zeux „Liquified Petroleum Gas“ (LPG). Die Franzosen verdrehen das bedeutungsgleich zu GPL. Ist dasselbe. In Großbritannien ist die Bezeichnung „autogas“ ebenfalls üblich und wird richtig verstanden.
Bezeichnungen: Erdgas, CNG, Biogas …
Erdgas, chemisch hauptsächlich aus Methan bestehend, hat den Vorteil, noch sauberer zu verbrennen als das ohnehin schon sehr saubere Autogas. Allerdings den Nachteil, dass man es nicht mit vertretbaren Mitteln flüssig bekommt. Dazu müsste man es entweder irrsinnig komprimieren oder irrsinnig runterkühlen. Ist beides fürs Auto kaum machbar, deshalb tankt man es gasförmig bei ziemlich hohem Druck – ziemlich hoch, damit viel in den Tank passt und eine annehmbare Reichweite dabei rauskommt. Da kommen im Tank schon mal 200 bar und mehr zusammen (deshalb platzen sie auch gern, wenn sie schadhaft sind, was Autogastanks nicht machen). Getankt wird Erdgas über spezielle Druckanschlüsse (komplett andere als LPG) in gasförmigem Zustand, abgerechnet wird nach Kilogramm (Liter wäre bei einem Gas sinnlos, die hängen vom Druck ab).
Biogas ist Methan, das nicht fossil aus Bohrlöchern quillt, sondern durch Vergärung von Biomasse gewonnen wird. Auch das Faul- oder Klärgas von Kläranlagen sowie das Deponiegas von Abfalldeponien bestehen im Wesentlichen aus Methan.
Englisch heißt das Zeux „Compressed Natural Gas“ (CNG). Stark gekühlt in flüssigem Zustand gibt es das auch, das heißt dann „Liquified Natural Gas“ (LNG), aber das hab ich in Deutschland noch nicht gesehen.
Ist ein P drin, ist es Autogas. Ist ein N drin, ist es Erdgas.
Bei anderen alternativen Kraftstoffen wie Wasserstoff besteht wahrscheinlich keine Verwechslungsgefahr, oder?
Aber es gibt doch auch fuel:autogas=*!
Ja – und das finde ich doof, unnötig und sehr verwirrend. fuel:autogas=* hat nichts mit Flüssiggas zu tun, sondern ist für Flugplatztankstellen gedacht, wenn diese auch normalen Straßensprit anbieten (die einfacheren Motoren von Ultraleichtflugzeugen laufen damit am liebsten). Das Tag ist aber deshalb komplett daneben, weil kein Flieger dazu „Autogas“ sagt. Man sagt international „Mogas“ oder deutsch „Super plus“ (es ist mit dem Super Plus von der Autotankstelle identisch). Am besten wegwerfen (das Tag meine ich, nicht den Sprit). Aber eine Flugplatztankstelle gehört ohnehin aeroway=fuel getaggt, nicht amenity=fuel ;-)
at 25th And Main Street in Vancouver, BC area, next to the bookstore on Main and 25th Ave.
Hi everyone! This is my first user diary here!
Recently I've began to map the area around the towns Le Thillot, Fresse-sur-Moselle, Saint-Maurice-sur-Moselle and Bussang. I've lived in this area for a few years and still visit multiple times a year. When I pulled up the street map I saw a lot of missing features, badly-maintained maps and inconsistencies.
For example, importing the land register (Cadastre 2014) has given a lot of strange shapes (e.g. cutoffs in buildings when an area line cuts through it or non-orthogonal shapes). Although satellite imagery is often misaligned/warped in this hilly landscape, some buildings are obviously in the wrong place, too small, rotated, etc. It's hard to fix these without good quality aerial imagery, but in some cases it's easy to see what's wrong. Not everything will be able to get fixed though.
Misaligned buildings in Le Thillot:
I've also taken upon me the responsibility to map the missing driveways in the area (also missing in the image above). As many of these building are freestanding houses, almost all of them have a driveway. Sometimes these driveways are quite long, and their absence on the map is prominent. These will be added. Other times, they are small, the buildings are close to the roads and they are so difficult to see on aerial imagery that it's barely worth the bother to add them.
Furthermore, over the years many POI and amenities have been added to the map as single nodes. Maybe there wasn't a building outline available back then, or someone simply didn't bother to look whether the tags could be placed on an existing outline. Where possible (i.e. single use buildings), I will be moving the tags from the nodes to the building contours.
This is also a slight problem for addresses. Many addresses in Le Thillot and Fresse have been added through the land register data, which is great! What is less great is that the land register places the house numbers quite far away from the actual house itself (see images above and below). I will be trying to move the nodes into the contour where possible. Sometimes it is difficult to figure out which numbers belongs to which house, but with the aid of the land register and aerial imagery it should be possible in almost every case.
Many addresses are simply missing as well. To begin with, the villages Saint-Maurice and Bussang have simply not been mapped and very few addresses are in the map. Then, there are the addresses that are missing on the land register. For some bureaucratic reason, the house number on it are not often updated. This is for example the case in the street our property lies on in Saint-Maurice. Therefore adding all the addresses will need extensive surveying. I do not think I will be able to do this is the limited time I'm spending there.
Thoughts on nodes in buildings, or tags on the contour for addresses:
I would like to know what your thoughts are on the idea of using separate nodes for the address of a building or placing the address tags on the building outline itself (image below says more than a thousand words). I know several countries have different conventions for it. For example, the Netherlands place all addresses as nodes inside buildings because it is much more convenient with the continuous BAG imports. Luxembourg city places the addresses on the building ways, I've not asked them why. I've asked this question on the France user forum but I haven't had a response yet. So, what are your thoughts on it?
Explanatory image for address tagging schemes:
Finally, I want to map many missing tracks and trails in the area. I'm an avid fan of hiking, so when I saw how many paths were missing I thought "Hey, I can fix that!" That is the reason I signed up for OSM. The biggest problem with mapping these is that they are hardly visible on the aerial images (covered in under, not well defined) and the land register is way too inaccurate, not to speak of imagery warping in the mountains. They will need to be tracked extensively with GPS, so in case you're passing through the area don't hesitate to upload your tracks!
In the end I hope to use the OSMC Reitkarte scheme to map tracks in the entire Vosges with their respective markings. Many of the trails in the area are very well marked and sustained, but it will need close survey to map them all.
So, that was an update of why y'all were seeing high activity in this area by a new user. I hope that you will look in on me every once in a while to check I'm not making stupid rookie mistakes. Also, if you know this area or can spare the time to help surveying and tracking, all the help is more than welcome!
Well... It's been a while since I've written in my OSM diary. Not much has happened since then, other than me editing (rather sparsely if I might add), and not really telling anyone what I'm doing. Well, that's going to change soon. Sooner or later, with proper permissions if need be, I'm planning to completely redo all administrative boundaries in Cabarrus County, North Carolina.
ソースの変更があると思われた場合は、三重県四日市市の 垂坂公園 を確認するようにしています。
「Pokémon Direct 2017.6.6」は実機ゲームの情報のみで、Pokémon GOについての情報はありませんでした。
I recently came to know about the practice of Female Genital Mutilation (FGM) and it absolutely horrified me. I learned that many young girls are cut in a "cutting season" and that starts in December in many parts of Tanzania. While this procedure is regarded as a rite of passage, this is a harmful procedure that can cause infection, cyst, urination and menstrual flow problems, infertility and death. Tanzania Development Trust is trying to help these girls by rescuing them and providing them a shelter but the problem is, Tanzania is not mapped. To reach a village that is in the middle of a vast plain is already hard and doing it without a map is near impossible. What us mappers can do is provide them with a map that can help many girls avoid this unnecessary process.
The current task is here: http://tasks.hotosm.org/project/3134#
I am mapping. Hope you will join too.
Yesterday my brother came by for a visit. He wanted to go for a short walk in the forest. So we drove to a place that we had planned to check out for some time. According to some an old quarry map, there was supposed to be a quarry for black granite in a forest area. The exact location was quite uncertain, and it was not entirely clear if the thing existed at all.
So we parked the car were the road ended and started walking along an road created by forestry machinery. We searched but could not find any trace of any quarry. Finally we gave up, but on our way back to the car we decided to try another old forestry road. After a few hundred meters we spotted an bare rock surface that looked interesting. It did not have any quarry, but instead several cave entrances. The caves were quite small, but still! These caves did not exist in the swedish cave database, which made them a very nice find!
Then we decided to walk a few hundred meters further, since my "slope map" showed that there could be something interesting nearby. Then we saw an old road that was constructed of "skrotsten" (discarded stones from quarries or mines)!
Then we saw a large pile of discarded stones. We had found the quarry! Continuing on through the trees that had grown on top of some of the stones, we found the actual quarry hole as well. Most of it is waterfilled. Unfortunately I did not bring my camera, since it was a spontaneous trip, so I could only use my cell phone.
The final interesting thing we found was the ruin (concrete foundations) of an old building, close to the quarry hole. What it's purpose had been, we could not figure out.
All in all, we found several interesting things during our short walk. As a bonus we also saw a very beatiful fox, which was quick and shy for taking pictures of, however.
Munnar Hill Station (Photo credits: Ashley Ann Mathew 🙂)
My hometown Munnar is a beautiful hill station located in south western Kerala, known for its tea plantations that cover the countryside like a picturesque green carpet. Munnar town is situated at the confluence of 3 ( "Munnu" in Malayalam) Rivers ( "Aaru" in Malayalam) and hence the name Munnar. The modest beginings of the town and plantations were laid during the British Raj and it has today morphed into a quaint little town that is a favourite with nature lovers. It is the nearest town to Anamudi peak, which is the highest peak in South India. The Eravikulam National Park is another tourist attraction, that is home to flora and fauna such as the Neelakurinji flowers (that blossoms once in 12 years) and the Nilgiri Tahr. Other famous landmarks include the Tea Museum, the Mattupetty dam and the Indo swiss farm.
Coming to the Map, most of the places mapped were done primarily for tourism purposes. Hence, I found mostly resorts and hotels tagged. Also, the roads were mapped in a crude manner. As a start, I mapped most of the public buildings and points of interests like shops, hospital, school, playground and auditorium. I also corrected many of the buildings I found wrongly tagged. In the future, I would like to remap the roads and add more buildings.
Most of the roads are way out of the right path as seen below, that needs to be reviewed and improved :
Overview of Munnar town after mapping!
Mapping Munnar unleashed a wave of memories in me - it truly is my favourite place in the world.
Am seeking names for three monuments in Ashgabat traffic circles that do not appear to have name plaques. The traffic circles at the intersections of Atamyrat Nyyazow and Gorogly, Ataturk and 10 yyl Abadancylyk, and Galkynys and Beyik Saparmyrat Turkmenbasy are unidentified...but they must have names! I think I've identified all other monuments located in traffic circles in this city.
Посмотрел правки соседей по городу. Как то печально. 8,7,6 лет назад. Ближайшее год назад. Получается правят больше иногородние чем Астанчане
After the usual Saturday grocery shopping (at the newly reopened supermarket in the Bagtyyarlyk shopping center, which was closed for months for unknown reasons), I collected the names of the last monuments in traffic circles along Dowletmamed Andalyb kocesi for which no names had yet been collected. All the monuments are now named in OSM! They are (the occasional descriptions below come from the local newspaper):
Andalyb and ... Hoja Ahmet Ýasawy: Šahyr binasy (Poet's Monument) // 18 meters tall, depicts a blossom inside of which are an ink well and giant quill pen, symbols of poetic inspiration ... Aga Berdiýew: Döredjilik binasy (Creativity Monument) // 20 meters tall, symbolic tongues of flame, 30 meters in diameter. ... Magtymguly: Erkanalyk binasy (Open Spaces Monument) ... Görogly: Alaw binasy (Flame Monument) // three steel columns reaching upwards in the shape of flames, representing a communal hearth, prosperity and sufficiency, evincing the Turkmen people's deep respect for "dastarhan", the tablecloth of abundance ... Galkynyş: Öşüş binasy (Development Monument) ... Atamyrat Nyýazow: Jebeslik binasy (Solidarity Monument) ... Oguzhan: Dowamat binasy (Constance Monument) // Spherical construction of six columns in the shape of the moon, symbolizing the six sons of Oguz Han. ... Ýunus Emre: Ebedilik binasy (Eternity Monument) ... 10 ýyl Abadançylyk: Zemin binasy (Earth Monument)