Recent diary entries
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)
Spent part of a lazy Saturday morning checking out map notes left by other mappers in Ashgabat, editing corrections into the map based on a) their suggestions, b) my verifications from ground truth.
Когда-то очень давно, ещё до осознания начала Непредсказуемой Непредсказуемости, автор любил путешествовать. Чаще всего "дикарём" по окрестностям города М. Топографическими картами пользоваться умел, даже пешком микро-турпоходы водил по знакомым местам, ибо на велосипедах было некому и некогда.
Потом... Кто в теме, тому и так ясно, а прочим лучше бы не знать.
Вернувшись в строй велосипедистов, начал знакомиться с потребительской навигацией подробнее. OSM и производные от него быстро росли по наполнению и точности, однако многих просёлочных дорог до сих пор нет. И вот однажды решил это дело поправлять, отправляя треки в проект. Вот только ноги после большого перерыва слушаться не очень хотели, потому наездил мало, однако изучал правила тегирования дорог.
В это самое время приколол brouter, который занимает почётное место среди моего андро-ведроидного софта. После этого OSM окончательно становится главным поставщиком карт. Но я любитель пересечённой местности, а там (по разным причинам) наполнение страдает ещё с 2013 года. Так как начали появляться спутники, стал вопрос об улучшении карт.
Давно просёк, что, выкладывая треки, ничего не дождусь... Дальше уже и так ясно. Смотавшись трижды на Шпиль (см. мои правки и треки) с товарищами, набивал не только ноги на педалях, но и собирал данные. А потом не выдержал и начал рисовать. К тому моменту OsmAnd сам научился прокладывать маршруты с учётом SRTM, что помогает продвигать программу и сами карты в массы.
Интересно, насколько оптимально проведёт трассировщик маршрут на тот же Шпиль?
Итак, основные мои цели как осмера - грунтовки, тропинки, просёлки. Также намерен править гидрографию в знакомых мне местах по спутниковым снимкам и SRTM (хотя понимаю, что и эти данные довольно приблизительные). Поэтому в качестве подготовительной работы на первом месте - расчёт смещения подложек и статистический анализ треков.
Что не так с гидрографией некоторых ручьёв?
Достаточно вспомнить отношение направления течения рек и ручьёв (вектор ускорения) к линиям постоянных высот (горизонтали - эквипотенциальные линии). Строгая перпендикулярность... если бы методика SRTM была точна, а другие актуальные данные недоступны. Но в случае больших перепадов высот по теням от деревьев линию ручья заметить реально, тем более - если там когда-то бывал вживую. Есть и другие закономерности, позволяющие уточнять линии течения по снимкам с орбиты.
Как будет делаться? Переключением слоёв OpenCycleMap (где есть горизонтали) и Bing. А может, кто-то решит пройтись вдоль самих ручьёв и запишет треков пять-семь с разных берегов, после чего следует аккуратно поиграться с gpsblam... С математикой у меня проблем не было, разберусь ;-) Диденкова балка ждёт своего судного дня }:-)
So I found the ruins of another sawmill in a forest. OK I had known about it for some time, though I was not sure it was much left or not. On an old map from the 40s (Ekonomiska kartan) it was visible and on an orienteering map from the 80s it was marked as a ruin. So I figured there might be something interesting there.
On my last mtb tour I went to look for it. I started to look for the path that was supposed to be through the forest. This turned out to be a mistake. There were note many signs of any path and I more or less had to carry my bike through parts of the forest. When I reached the water I finally saw an old path. I started to cycle on it, but after perhaps 50 meters it disappered again. Then the terrain got worse; wet mud combined with high grass with old dead trees on the ground. I was about to give up several times but always thought that if I would have given up, the whole thing would be for nothing. So I kept going.
Finally the ground became smoother and I found myself on an old road of sorts. And after a few meters I saw a pile of old broken bricks. Then I saw concrete foundations sticking out among the trees; I had found it! There were not much apart from the concrete foundations. And since there were so many mosquitoes trying to feed on me I did not want to stay for too long. I wanted to search for any old railway tracks, but the high grass made that difficult.
I took a few pictures and tried to outline the concrete structure with my gps. Then I followed the nice and even road out from the forest. I plan to go back someday, during autumn when there is not so much grass and mosquitoes. Then I will use the road directly and save myself 20 minutes of bike carrying.
A few years back within the Tendring District of England I started to place Notes on OSM when local government granted planning permission permitting development of new dwellings, roads or change of use of buildings i.e. an office building becomes a residential property. It’s a semi automatic utility which might feature in a future diary entry but for now let’s focus on OSM Notes.
I’ve created quite a few Notes and they’ve become difficult to manage. I needed a visual map highlighting notes that have not been reviewed for years so I, and others, can focus on returning to the oldest Notes updating and closing accordingly. After some thought I created this available at UMAP.
The rest of this diary is about how that’s produced.
I use a Raspberry PI, a credit card size always on computer running a Linux based OS. A cron job runs every Saturday and downloads from OSM all the open notes in the area I’m interested in. A Python program runs after the download sorting through the notes separating them into three CSV files, one for notes not edited within that last year, another for notes over 6 months old and another for notes edited within the last 6 months. These CSV files are currently manually loaded into my UMAP as layers but that can also be automated.
Now the detail
Downloading OSM Notes
There is an OSM Note API described in detail here
First we need the coordinates of the area you want to download. The easiest way I’ve found to do this is click on EXPORT (top left) on OSM, then select Manually Select a different area adjusting the displayed box to the area you want to extract notes – KEEP IT SMALL. The numbers displayed in the grey box are you’re bbox coordinates LEFT, BOTTOM, RIGHT & TOP as defined by the Notes API.
I then execute a wget command as follows.
wget -O /media/networkshare/raspberry/notes.xml "http://api.openstreetmap.org/api/0.6/notes?bbox=0.9277,51.7653,1.3019,51.9489&limit=10"
-O defines my output file
.xml as the file extension downloads notes in XML format
&limit=10 only 10 notes downloaded – maximum is 10,000.
Now I have a file called notes.xml listing all the notes in my area of interest.
Processing using Python
A screen shot of the Python Code is shown below The input and output file names are configurable as are the two date fields. In the sample above I’ve set the code to extract notes older than 365 days into the first file, notes between 365 and 183 days into file two and notes not edited in the past 183 days into the third file. The code produces CSV files for easy importing into UMAP. Each note also includes the username of the last person who edited the note and also the last comment and a clickable link through to the actual note hosted on OSM.
After executing the code using your input file notes.xml three new files (as defined by you) will exist ready for importing into UMAP.
Import into UMAP
I’m not going to explain the full process of creating a UMAP here, only the import process and the finer details of interaction and remote data. Click the import button (arrow as shown below) and then set the input file, file type, the layer and click REPLACE if you want your new data to replace the existing data.
The CSV file contains, in this order, 1. Longitude 2. Latitude 3. Note ID 4. Note Status 5. Note Date (last edit) 6. OSM User who made the edit 7. The Note text with commas and line spacing removed by the utility.
When a user clicks on a note a box appears which UMAP allows you to control the content and format. To change the formatting select Manage Layers, Edit (one of your layers), Interaction Options and format the Popup content template as shown below.
Automating the entire process
The download of data from OSM and running the utility are already fully automated. The one last piece I haven’t yet completed is “uploading” the data weekly to UMAP. This is actually easy if you have some hosting space as UMAP supports Remote Data. To complete this section you just need to Manage Layers, Edit (one of your layers), Remote Data and set the location of the three csv files which will be dynamically loaded as required. I’ve tried to use Google Drive for this purpose but annoyingly google drive changes the file name each time a revision is uploaded. A job for another day.
I hope that’s been of interest. I can make the code available to those interested, just get in touch.
Past street art:–
KeepRight is a data consistance and quality assurance tool for OSM. It's been around for years and years (since at least 2009). I used it ages ago and forgot about it. But it's still around, still updating, still checking OSM. Some of the checks don't make sense everywhere, so use your head and mark things as false positives if needed. If you're looking for some mapping & gardening, open it up, have a look at an area and fix up the map.
Every day I have been adding and fixing OpenStreetMap data. I have learnt and contributed in creating data of the highest possible quality in collaboration with the OpenStreetMap community.
Over this year I have created, edited and modified around 44,000 changesets. 😃
It has been a wonderful experience, during this time I learnt everything from mapping objects to using JOSM and various plugins.
In this year I worked on several Mapbox projects, such as:
- Make Ayacucho the best map in Latin America
- Import buildings
- Map bus route in Ayacucho - Peru
- To align roads in Taiwan
- To solve misalignment issues Data in Taiwan
- Offset database for Bing satellite imagery in Taiwan
- Map turn lanes in OpenStreetMap
- To solve To-fix task
- Use the To-fix plugin in the Tiger delta task
- Make a map, eliminate Malaria
As I got a clear understanding about the OpenStreetMap data, I realized that how my mapping is contributing in making of the best map of the world.
HOW CAN YOU IMPROVE THE MAP?
1. OSMCha is a tool of changeset level notification, giving an overview of how many objects were affected in a changeset. A set of suspects words automatically flag some suspicious changes. Custom filters can be used with changeset comment, source, and other combinations to look for suspicious edits. You can read this for more information:
- Improving OSMCha
- An open database of inconsistent edits observed on OSM from OSMCha
- Validating the map - Part 1
- Monthly roundup - common errors and unexplained edits observed
- Validation Scoop: Inconsistent edits observed
2. To-fix is a micro-tasking tool that breaks large data curation tasks into smaller jobs that are systematic and repeatable.
3. OSMLint is a tool identify common geometry and metadata problems OpenStreetMap data. OSMLint processes vector tiles with turf.js and TileReduce to produce geojson files of detected data errors.
These are few of the tools that have help me contribute to this beautiful map of the world! 🗺
river gets narrow for a small segment for no apparent reason
should fix this and loop elsewhere on the rio grande: http://www.openstreetmap.org/#map=14/34.9269/-106.6742
Usually when meeting old timer GIS users in academia or government, there are a bunch of questions I get asked about how OSM data fits into the more traditional GIS model where data is organised into shapefiles and layers.
Since I could not really find a simple article which explained the difference, spent a few minutes today to come up with a (possibly) easy to understand benefits table for someone in Government. Its not technically accurate, but could quickly help pitch the idea for opening up more data.
Its still very rough, feel free to contribute any suggestions/improvements that could make this useful.
This is what most of Podder Lane looks like today (1st photo below) and what the last 10 yards looks like (in my experience, the 2nd photo is an extreme example of the 'normal' condition of unadopted roads):–
The modern Podder Lane was originally the farm-track that gave access to Podder Farm from Mapperley Plains, and is a quarter of it's original length. A 3m-high hedge runs unbroken all down the north side of the street. There are only 5 bungalows that open on to the south side and — in spite of the 1847 Act, which declares that every house in the realm must have a number — like many unadopted streets, not one of these bungalows has a number, only a name.
The entire area was originally part of Thorneywood Chase — hunting grounds for the King & followers, a part of ancient Sherwood Forest, home to the legendary Robin Hood, and the reason that Nottingham City has stags as supporters on it's crest (modern Nottingham is a Unitary Authority; it became a City in 1897 by Grant of Queen Victoria; the Crest stags (granted 1908) were originally (1898) ‘Foresters’, which is to say “Robin Hood”; the arms were officially recognised in 1614; the motto “VIVIT POST FUNERA VIRTUS” translates as “Virtue Outlives Death”):–
Mapperley Plains runs along the ridge-line at the top of the hill that rises all the way from Lambley Lane. Podder Farm is now long-gone and, with hindsight, never had much chance of surviving. The farm can be seen on old maps (in JOSM use
NLS - OS 1:25k 1st Series 1937-61). The modern cycle lane/footpath that connects Denbury Court with Gedling Country Park crosses the top of the no-longer-existing farm-track, at the point where the farm-buildings began, just where the cycle track leaves the trees. It is as if the old tracks continue to haunt the land, and there is more of that...
Podder Lane used to run all the way & connect to where the footpath meets Chedington Avenue (and yes, both are on the old maps, as is the public footpath that connects to Mapperley Plains). The Regency Heights developer wanted to use Podder Lane to get his deliveries in & out, but that road is a private road & the folks already living there (who own the land that the road is on) all flipped the developer the finger. The developer was not best pleased.
At that stage the lane had previously supplied a car scrapyard & (I believe) a Rugby club. The lady in the last house told me that the rest of Podder Lane was owned by a mushroom farm, and that they sold it to the developer, who promptly de-commissioned it as a road (the Google Satellite photos suggest that the developer did not bother to even lift the tarmac).
Podder Farm essentially received a death sentence as soon as Digby Coal Company (Gedling Pit) was established in 1899. The pit spoil was carried by aerial ropeway & deposited over large parts of the hill, including Podder Farm's fields. The pits closed in 1991, and 5.71 acres (23,169m²) of Podder Farm land were sold in 2011 for £4m GBP by the City Council to Taylor Wimpy (pdf). That land is currently being prepped ready for new houses. Meanwhile, much of the rest of the hill was desolate wasteland, and potentially dangerous if not stabilised. Gedling Council have re-sold part of it to the public as the Gedling Country Park and, since masses of new houses require require tarmac so that their co-owners can go to & fro a bypass is being built through the lower parts (observing the size of the garages I often think of modern houses as being co-owned).
Решил попробовать редактировать для ОСМ. До этого несколько лет правил карты в GPSMapEdit. Теперь пытаюсь освоить JOSM. Идеалогия отличается в корне от того к чему привык. Первая мелкая правка данных - Астана