Your points are well taken but in this case when the building outlines are imported by someone like James and are of high quality to start with as they were in Ottawa then these concerns are less relevant.
At the moment Stats Canada have released some building outline data under the Federal Government's Open Data license. So far I haven't seen anyone say they are interested in importing it. Generally speaking local mappers are involved in the import or not to import decision making process. This is country wide so who would make the call? Locally in Ottawa we have already imported the building outlines so Ottawa isn't really part of this. Bjenk is no longer available, his advantage was he has worked with the local Ottawa mappers. I'm not seeing any groups of local mappers saying yes we would like this data. Montreal in the past have said they are interested but don't have the resources to do the import nor to add tags to the buildings afterwards. Julia was involved in the web page for 2020 but coordinating something of this size would need more than Julia and I'm not sure if she is active in OSM at the moment. My concern is if the data is available either at the moment or in the near future through Treasury Board's Open Data portal then mappers who have been importing bits of CANVEC data through the portal will treat this as being the same and we will get lots of very small imports of perhaps half a dozen buildings scattered across the country. A more systematic import would be less work over all and insure cleaner coverage. Cheerio John On Fri, 2 Nov 2018 at 14:58, Pierre Béland <[email protected]> wrote: > Bonjour John > > Tu as vu avec moi lors de coordination de Réponses humanitaires majeures > telles Ebola en 2014 et le Népal en 2015 l'arrivée de plus en plus de > mapathons notamment organisés par MissingMaps. Les flux constants de > nouveaux arrivés qui viennent pour quelques heures s'initier à OSM, > ajoutent beaucoup de problèmes difficiles ensuite à gérer. Et on l'a aussi > vu oui avec le projet B2020. Ceux qui proposent de démarrer de nouveaux > projets d'import doivent doivent être prêt à consacrer beaucoup de temps à > la coordination et accepter toutes les frustrations et difficultés. > Difficile de contrôler tous les groupes scolaires ou autres qui veulent > participer mais de façon non suffisamment planifiée et structurée. Bien > intéressant pour une classe de s'initier à OSM. Mais comment assurer que > OSM bénificiera de cette expérience? > > Pour un bon tableau de suivi, il ne faut pas uniquement des nombres > d'objets ajoutés. Il faut aussi des indicateurs de qualité tel que > l'indicateur sur les géométries irrégulières que j'ai développé récemment. > On y voit les projets où un nombre anormal de bâtiments sont tracés avec > des formes irrégulières. Mes analyses montrent que les statistiques pour > une ville ne devrait montrer en général que des ratios en 5 et 10% > d'immeubles avec des formes irrégulières. Pour un projet en Ouganda, j'ai > observé un ratio de près de 60%. Évidemment, lorsque l'on analyse de plus > près, beaucoup d'erreurs qui risquent de ne jamais être corrigées. > > voir > fr https://opendatalabrdc.github.io/Blog/#!index_fr.md > en https://opendatalabrdc.github.io/Blog/#!index_en.md > > > > > > > > Pierre > > > Le vendredi 2 novembre 2018 12 h 31 min 59 s HAE, John Whelan < > [email protected]> a écrit : > > > My feeling is OpenStreetMap has two sides. The first is local adding > local knowledge to the map. The other I'll call armchair mapping. When > Stats Canada did the pilot it tapped the local Ottawa mappers who meet > physically. > > I would agree that amongst mappers with the most edits there is a high > number of retired people and those with disabilities involved and these may > not be visible. Tapping them for groups coming together to map can be a > problem. > > In my view typically the most productive mappers are those with a special > interest. Adding WiFi access or churches for example or even a change of > street name. > > We also have a number of teachers who would like to use OSM and in > particular the building project to involve their students. We get a fair > amount of data added but the quality can be questionable. HOT and others I > think have found that using a restricted set of tasks and tags works best. > > My personal feeling is giving feedback is useful. So the challenge for > the building project is how to engage people. What are the most useful > tags to add? > > I'd suggest some sort of web site giving the number of buildings mapped > and the tags that have been added by city. Graphs with time as one axis > would be nice. > > Certainly certain activities are more complex than others. Importing > buildings is not a task I'd suggest for teenage mapper with twenty minutes > experience. Breaking out the tasks is a task in itself and for 4 million > buildings I think it could benefit from a project plan. > > I think we've seen with the 2020 project that just saying it would be nice > to have by is not really enough to sustain it but who would do it I'm not > sure. > > Cheerio John > > > Jonathan Brown wrote on 2018-11-02 11:28 AM: > > Apropos the ongoing efforts to educate new volunteers, the discussion > section of this research paper on enablers and barriers may be useful > https://ac.els-cdn.com/S0747563216305295/1-s2.0-S0747563216305295-main.pdf?_tid=31ea73b8-7cb4-4eca-acc4-062aa79c278b&acdnat=1541171937_ecb61791a7d798a1491503b71f69b0ab > > > > Jonathan > > > > > _______________________________________________ > Talk-ca mailing > [email protected]https://lists.openstreetmap.org/listinfo/talk-ca > > > -- > Sent from Postbox > <https://www.postbox-inc.com/?utm_source=email&utm_medium=siglink&utm_campaign=reach> > _______________________________________________ > Talk-ca mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-ca >
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