Recent diary entries
Как элементарно пользоваться геопространственными функциями с Overpass API и пара слов о addr:country, addr:cityPosted by d1g on 21 August 2014 in Russian (Русский)
Теги "addr:country"=* и "addr:city"=* внутри указанного полигоном города это атавизм. Они реально не нужны и информации в себе не несут. Реально они нужны только для объектов которые находятся вне границ населённых пунктов. Т.е. вне полигона, в таком случае они действительно нужны, ибо официальную границу нельзя просто так взять и "перетянуть" на один дом или посёлок. Либо наоборот, когда внутри города есть объекты которые причастны к другому городу по какой-то причине.
В OSM катастрофически боятся (не умеют) пространственными запросами к БД. Это вводится почти в культ:
- почему мы отмечаем addr:country и addr:city - да потому что все так делают (типичный диалог пользователей OSM на любом языке за последние N лет)
Одним из доводов указывальщиков "addr:country" и "addr:city" это "потом просто выбирать любые объекты без нужды в гео-пространственных функций". Возникает вопрос: зачем тогда в OSM есть PostGIS и OverpassAPI (для пользователей)? Зачем все эти заморочки с GPS? Писали бы себе преспокойно в OSM.txt и ничего не нужно было себе усложнять?!!
Выбирать любые объекты внутри именованных закрытых путей и мультиполигонов через OverpassAPI это просто элементарно. В Overpass IDE (http://overpass-turbo.eu/) для запросов сгенерированных помощником достаточно поменять
Где XXXXXXXX это OSM идентификатор закрытого пути (way) либо мультиполигон плюс константа. Для мультиполигонов нужно прибавить 3600000000. Для закрытых путей 2400000000. area-query ref работает не для всех объектов (детали здесь), а для тех, у которых есть name=*. В случае городов это всегда-превсегда так, т.е. боятся нечего и отговорок быть не может.
<osm-script output="xml" timeout="25"> <union> <query type="node"> <has-kv k="amenity" v="fountain"/> <area-query ref="3603955288"/> </query> <query type="way"> <has-kv k="amenity" v="fountain"/> <area-query ref="3603955288"/> </query> <query type="relation"> <has-kv k="amenity" v="fountain"/> <area-query ref="3603955288"/> </query> </union> <print mode="meta"/> <recurse type="down"/> <print mode="meta" order="quadtile"/> </osm-script>
На самом деле всё еще проще: вам нужно указать в помощнике http://overpass-turbo.eu/
amenity=fountain in "Саратов"
Finally Bing has updated some old imagery here (from 10~12 years ago).
Unfortunatelly the new images are just a big and nice void: http://binged.it/YBiZVe
"Thank you", Bing.
Comanzando el trazo de este pequeño pueblo y sus alrededores.
Nombres de las calles y trazos de la parte Noreste del Morelia dentro del libramiento concluido. Abarcando desde la calle Guadalupe Victoria hasta la Avenida Madero
中华人民共和国民政部规划财务司 统计标准 http://cws.mca.gov.cn/article/tjbz/
中华人民共和国民政部规划财务司 区划代码 http://cws.mca.gov.cn/article/tjxxxt/tjdm/
Tonight we're heading out mapping again! Join us for a London mapping evening in the Bond Street/Mayfair area.
I'm not doing very well at catching up with my diary entries on all the interesting things which have been happening. Since my last diary entry more things have happened, mostly all in one weekend! The weekend before last it was the OpenStreetMap 10th birthday party of course, but for me at least, that was not all:
- Friday - Open Addresses Symposium
- Friday night - wikimania entertainment
- Saturday a.m. - wikimania OpenStreetMap sessions
- Saturday midday - appearing on sky news
- Saturday p.m. - OpenStreetMap birthday pub!
- Sunday a.m. - breakfast with Frederik
- Sunday - more wikiania sessions
The Open Addresses Symposium was an event put together by the Open Data Institute who have got funding to implement an Open Addresses project (dataset / software / community). In the UK we had an opportunity to make Royal Mail's Postal Address File an open dataset (Why? Because it's infrastructure. Make it free and open, and all kinds of innovation are quietly but obviously enabled) Instead our government recently sold it off as an asset along with the rest of Royal Mail, and this publicly-owned dataset was lost forever. Stupid. PAF was the topic of an open data campaign for years. It's ended badly, but on the plus side it means we can write that off and move on. So at the Open Addresses Symposium, a couple of hundred address data experts and corporate users gathered to discuss this, and the idea of creating Open Address data. Steven Feldman has a write up here. The actual plan wasn't laid out yet (discovery phase) but it will probably involve joining together various open data sets in clever ways, combined with some "crowd-sourcing" element.
Jerry and I were there representing OpenStreetMap. Being so busy lately I was grateful to not be doing a talk. Jerry did a great job of this:
When it comes to OpenStreetMap there's two big bits of bad news: (1) In the grand scheme of things we have data on only a tiny proportion of addresses in the UK (2) Our data has share-alike restrictions which this project would be aiming to avoid. But Jerry talked up the positives, and in particular the fact that OpenStreetMap community has a lot of experience (and open source code) in the "crowd-sourcing" side of things, on-the-ground surveying, and crazy JFDI approaches in general.
There was also a talk from the legendary Bob Barr. Always with an enjoyably passionate presentation style which gets the audience excited. I remember first seeing him give the opening talk at State Of the Map 2008, in which, coincidentally, he passionately argued for liberating address data sets!
Some good conversations with people in the pub afterwards too, but then I had to head off to...
Friday night - wikimania entertainment. I wanted to start taking in the buzz of wikimania. It is a buzzy kind of conference with a lively community, much like State Of The Map, only three or four times the size! Actually the buzz on Friday evening at the Barbican was a bit subdued. I suspect the real party was in a pub somewhere. I did however bump into some OSMers, Tim Waters, Edward Betts, and Paul the Archivist. There was a screening of the movie about Aaron Swartz which was inspiring, thought-provoking, and a bit depressing (available to watch on youtube there) Mostly it made me think "oh that's what that SOPA thing was all about". Maybe I should've paid more attention at the time.
Saturday a.m. - wikimania OpenStreetMap sesssions. Back to the wikimania venue the next day (which was looking a lot more lively) to catch the sessions about OpenStreetMap.
Andy Mabbett gave an introduction to OpenStreetMap for wikipedians. I realise I've probably now given more talks introducing OpenStreetMap, than I have seen other people's talks doing so. It was interesting to see his way of explaining the project to a semi-technical audience. Very rich with examples of different map displays from Birmingham (and from the mappa mercia site), and "guess what this map is showing" audience participation. He also touched on some ways that we can look to link wikipedia articles to OpenStreetMap elements.
Great to meet User:Seav. He's setting up OpenStreetMap Philippines, but was over at the the wikimania conference and giving a talk about various collaborations between OpenStreetMap and Wikipedia. He went into some thorny license issues around (not) cross-sharing geo-data between the projects, which prompted some questions. I thought he did a great job answering all of these. It was one of those Q&A sessions where the audience is left in no doubt that the speaker really knows their stuff.
After that Katie Filbert was running a HOT mapping workshop, apparently this went well but with some troubles due to poor wifi. I had to duck out just at the start of this unfortunately because I had to get to...
Appearing on sky news. This has to be one of the most bizarre experiences of my life. The day before I had a few emails and was suddenly lined up to be giving an interview about H.O.T. and our ebola response mapping. It seemed to be a live TV interview, but I wasn't 100% sure until I got there. I headed over to the sky news studio at an address by the houses of parliament, which turned out to be a very grand old building entering via a cavernous wide stair-case. I saw an office full of desks and a big news studio type thing, but nobody around apart from one bloke who let me it. He was on the phone to their other studio and merrily led me past the office and into small dark cupboard. He sat me on a chair with TV camera pointing at me, and a small TV in the corner. His instructions were to "watch the monitor, then look at the camera".
After a minute an ordinary newsreader woman appeared on the TV, except that she was picking her teeth and getting ready, which was a strange thing to see. Then suddenly, at 12:30 I suppose, she was reading the news headlines, and I was watching the very ordinary looking news as I relaxed sitting in my dark cupboard. Then she said "here with me now is Harry Wood from the Humanitarian OpenStreetMap Team" at which point I suddenly thought "ooh that's me! look at the camera! look at the camera!". I answered some questions about OpenStreetMap, and how MSF and Red Cross are using maps. Not sure if I got the key points across very well (fairly sure I didn't in fact!). It felt like less than a minute and it was all done and dusted. Left the studio. Out into the sunshine.
I should've taken a photo of the news studio to prove I was there. Since then I haven't been able to find an archive of the news online anywhere. One person on twitter said she'd seen it, but aside from that I have no evidence that my appearance on Sky News wasn't just a weird daydream!
No time to ponder that though. I had to get back. I snapped this photo then got the tube back round to the barbican just in time to miss the end of the HOT mapping session! Worth getting back to appear in the wikimania group photo though. Also the OSMers at wikimania group photo:
OpenStreetMap birthday pub! This was the main action of the weekend of course, although for me I was looking forward to chilling out with a beer after all the excitement. In the run up to this weekend I'd been bombarded with all sorts of the OpenStreetMappiness. I haven't even had chance to mention how I was sent to Washington for H.O.T. the weekend before. Craziness! All of which meant I hadn't had chance to do any spectacular preparation for the 10th OpenStreetMap birthday. Dan had a few ideas, and worked on putting out a press release (thanks!). When I sat down in the pub, I needed to finish writing a blog.openstreetmap.org blog post!
I was imagining I'd get time to do this before many other people arrived, but actually (despite me largely failing to promote the event properly) we had a lot of people coming along, and from quite early after the 3 o'clock drinking kick-off. Good show everybody! Also I was sad to have failed to organise any cake, but who needs to organise when we have a surprise distributed doacracy in action. Matt showed up with cake to make things OSMbirthdaytastic!
Let's just take a closer look at that.
He was attempting to bake an OpenStreetMap logo through the middle of the cake! Looks a bit squashed, but it kind of worked. Good effort! Robert also got cake-creative. He was also worried we might not have a cake and so rapidly baked a parkin style cake with the Thames river icing sugar design sprinkled based on OSM map data of course.
The choice of venue worked pretty well in the end. The Artillery Arms pub is pretty tiny, but as I had hoped, it was mostly empty at 3 on a Saturday, so we were able to rearrange tables and essentially take over half the pub. The take-over was complete when Dan wrote a birthday message on the blackboard behind us! And our numbers were swollen in the evening as people finished at wikimania nearby and popped over to join us.
I should've got a better photo of the whole crowd, but I reckon we probably had 25 or 30 people there.
Of course... I was very drunk at time. Luckily Frederik was staying with me, so he could carry me home.
Frederik was also treated to some glorious english summer weather as we headed back to wikimania the next day. Despite having umbrellas, we got absolutely soaked on our lower legs. So yeah Sunday I was sat watching some wikimania talks with soggy trainers, feeling hungover. It reminded me of that time when I fell in the canal at SOTM Amsterdam... but that's another story.
So yes. That was one hell of a weekend! But things are back to normal now. No cake at tonight's pub (unless someone surprises me again!) but we do have a cake diagram! Edit that page to grab a slice of cake, if you want to help nail those Mayfair building outlines once and for all (is it ever going to happen?) Or just come to the pub from 8pm. All the details on the wiki for tonight's event
A wiki, in it's essence, is made to have it's pages quickly and easily changed by different users, while preserving the history of previous versions.
Although most changes in the OSM wiki are made in good faith, some people may inadvertently alter the meaning of a page (and therefore of an OSM key or tag). In order to guarantee a wiki page's integrity, one may want to be notified of a wiki page's changes.
To be notified of a wiki page's changes by email, first the email notifications must be turned on. This can be done on the settings page, by turning on the checkbox “Email me when a page or file on my watchlist is changed”, and clicking on the button “Save”.
After that, all that is needed is to add a wiki page to the user's watchlist. This is easily done by clicking on the little star on the upper right of each page. When the star turns blue, that the page will be in the user's watchlist, and therefore the s/he will be notified of further changes on that page or it's talk page.
Note that, when you receive an email notification, you won't be notified of further changes unless you actually see those changes while logged in.
Um sistema wiki, em sua essência, é feito para ter suas páginas alteradas facilmente e rapidamente por diferentes usuários, e ao mesmo tempo mantendo um histórico de versões anteriores das páginas.
Embora grande parte das alterações no wiki do OSM são feitas com boa fé, algumas pessoas podem acidentalmente alterar o significado de uma página de forma negativa (e portanto alterar o significado de uma chave ou etiqueta do OSM). Para garantir a integridade de uma página do wiki, um usuário pode desejar ser notificado de suas alterações.
Para receber por email notificações de alterações de uma página do wiki, primeiro é necessário ligar as notificações de email. Isto pode ser feito na página de configurações do usuário do wiki, ativando a caixa “Notificar-me por email quando uma página ou arquivo vigiado for alterado”, e clicando no botão “Salvar”.
Depois disto, só é necessário adicionar a página wiki desejada para a lista de Páginas vigiadas do usuário. Isto é feito facilmente clicando na estrela que aparece no canto superior direito de cada página. Quando a estrela ficar azul, a página vai estar na lista de página vigiadas do usuário, e o usuário receberá notificações por email cada vez que aquela página (ou sua página de discussão) for alterada.
Note que, quando o usuário receber uma notificação por email, ele não será notificado de futuras alterações enquanto ele não visualizar aquelas alterações, estando autenticado no wiki.
The area around where US #321 crosses the South Edisto River could use some attention.
Comienzo parte Noreste de la ciudad por dentro del libramiento.
Agregados los nombre de calles del área comprendida entre la Ave. Madero - Acueducto y Periferico. Se añadieron las calles que no estaban trazadas.
Po wczorajszych wiadomościach o OSM na popularnych portalach mamy dużo nowych mapowiczów. Jeśli jesteście w stanie to przygarnijcie ich pod swoje skrzydło :-) na pewno potrzebują pomocy
To improve quality I use from time to time the following tools:
- View last changes in your region with WhoDidIt
- See what exactly was changed with OSM Hisory Viewer
- Check errors with Keep right!
- Check OSM Notes, OSM Inspector (View: Addresses!), MapDust
- Improve Street name mapping with Regio-OSM
- Find duplicates, different street names etc. with housenumbervalidator
After the use of all of this tools to find possible errors, the mapping of my regions looks much better than before and I have learned a lot.
Keep on mapping! But think first!!
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Para quem ainda não conhece, há dois canais no IRC para quem simpatiza ou fala português:
Os dois canais estão no OFTC.
Usuários com dúvidas ou que queiram apenas bater um papo são bem-vindos em ambos.
I have been editing with Potlatch 2, but would like to upgrade to JOSM. Is there a way to run JOSM on a Mac OS?
Rue Aristide Briand, je passais par là et notais un canapé installé au coin de la rue. "C'est l'occasion de passer une excellente soirée" convins-je.
Je courus donc vers mon appartement pour y dénicher un sachet de thé et je revins vers le canapé pour m'y allonger. Il étais très confortable mais ma joie fût vite entamée. Je n'avais ni bouilloire ni tasse et encore moins d'eau claire.
Et j'étais bien seul.
Meet the Android persons: Designs pose at a Samsung Galaxy launch event in Korea.
We have not too long ago been examining the case that Android phones are bought by poor people though Apple's iPhones serve the 1% (or at the very least the richest eleven.7% in the marketplace).
"Poor" is often a relative term right here, and a few individuals do not like hearing it. See the feedback underneath this story, for instance.
We're referring to "the poor" within a macroeconomic sense. Per capita earnings from the U.S. is about $47,000 annually. In India it's just $3,560, according to the world Financial institution. One among these groups is "poor" by comparison.
Marketplace research group IDC published some information which makes this situation much more cogently than we've been capable to so far.
Almost 60% of Android phones offered expense less than $200. Android's core market barely bothers with all the $200 to $400 midrange, and only about 20% of revenue are from the premium $400-plus area.
Apple, with its iOS mobile operating method, by contrast, sells the huge bulk of its gadgets ?a a lot more than 80% ?a inside the $400-plus selection. The organization barely bothers with all the midrange, and it sells zero phones underneath $200.
Android cell phone makers could selling price their wares in the $200 to $400 selection ?a however they will not. They sell most phones for $200 or much less. That strongly suggests that Android makers know there exists a large chunk with the market place that is price-sensitive on phones.
Selling price isn't an precise proxy for buyer cash flow obviously. A number of people who obtain a $200 phone can afford a $400 but select the more affordable one particular anyway.
Nevertheless, it's also real that any individual who buys an Apple mobile phone at $400-plus may also afford a $200 handset but chooses not to. Meanwhile, any one who can afford only a $200 cell phone are unable to, by definition, invest in an Apple cellphone.
Those men and women are "Android people today," irrespective of whether they like it or not.
Will not presume that is only a couple of bad men and women skewing Android's numbers, from the way. Eighty-five % of all smartphones offered are Android phones. Android is excellent proxy for all of humanity, in other words, and humanity generally would like a smartphone for beneath $200.
Az OpenStreetMap 10. szülinapja alkalmából rendezett mapping party, akadálymentes helyek feltérképezése az első olyan eseményünk ami igen komoly sajtóvisszhanggal büszkélkedhet. Köszöntet az összes szervezőnek!
- HVG Térképre kerülnek a belvárosi akadálymentes helyek
- M1 Híradó Akadálymentes belvárosi térkép készül
- ATV Híradó Így készül a belváros akadálymentességi térképe - felvétel
- Gyógypedagógiai Szemle : Hamarosan elkészül a belváros akadálymentességi térképe
- OPEN STREET MAP – avagy hozzáférhető belváros
- Klub Rádió 2014.08.18. 15:45-16:00
- Metropol Online akadálymentességi térkép készül Budapestről
- Wheelmap.org (angolul) Wheelmap in Hungarian – OSM and MEOSZ mapping Budapest