From ilasolthah at gmail.com Sat May 1 22:38:18 2021 From: ilasolthah at gmail.com (Samaila Alio) Date: Sat, 1 May 2021 23:38:18 +0100 Subject: [Talk-ne] Talk-ne Digest, Vol 18, Issue 1 In-Reply-To: References: Message-ID: Hi Cheerio, Aplolagies also for the late reply. Really it's an observation this last time when editing I meet a lot of duplicated buildings. I have deleted a lot of them myself and I still come across them. I'm also surprised that there are 3 times duplication. I wonder if editors are ignoring the warning messages when uploading data. I also noticed that users lack experience in the field on everything about tagging. I encounter a whole concession mapped as a building despite the non-existence of any building on the imagery. Building is considered by some as building, a poor knowledge of English. Regards, -- Samaila Le mer. 28 avr. 2021 à 12:08, a écrit : > Send Talk-ne mailing list submissions to > talk-ne at openstreetmap.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.openstreetmap.org/listinfo/talk-ne > or, via email, send a message with subject or body 'help' to > talk-ne-request at openstreetmap.org > > You can reach the person managing the list at > talk-ne-owner at openstreetmap.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Talk-ne digest..." > > > Today's Topics: > > 1. Duplicate buildings in Niger (John Whelan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 27 Apr 2021 18:23:23 -0400 > From: John Whelan > To: talk-ne at openstreetmap.org > Subject: [Talk-ne] Duplicate buildings in Niger > Message-ID: <28792fc7-e009-0ae8-5e47-cdd42fca41d6 at gmail.com> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > Apologies for using English rather than French. > > Just a heads up in case someone wondered why the number of buildings on > the map has dropped. > > I've sliced Niger up into sections and I'm currently looking for > duplicate buildings. So far I've removed more than a thousand. They > are inspected visually before being deleted so one of the duplicates are > left behind and often the same building has been uploaded twice somehow. > > I've also picked up a number of areas that contain half a dozen > buildings marked as a single building. These I've tended to change to > place=neighbourhood. Has anyone any other suggestions? > > Thanks > > Cheerio John > -- > Sent from Postbox > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.openstreetmap.org/pipermail/talk-ne/attachments/20210427/198be564/attachment-0001.htm > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Talk-ne mailing list > Talk-ne at openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ne > > > ------------------------------ > > End of Talk-ne Digest, Vol 18, Issue 1 > ************************************** > -------------- next part -------------- An HTML attachment was scrubbed... URL: From jwhelan0112 at gmail.com Sat May 1 23:22:45 2021 From: jwhelan0112 at gmail.com (john whelan) Date: Sat, 1 May 2021 19:22:45 -0400 Subject: [Talk-ne] Talk-ne Digest, Vol 18, Issue 1 In-Reply-To: References: Message-ID: I used to do a fair chunk of HOT validation but buildings are not fun to validate. If it's poorly mapped correcting it takes longer than it would take me to remap using the JOSM buildings_tool plugin. Also if you can catch the mapper within hours of mapping an error you get a better result than making a changeset comment two years later. I can split Niger up into six sections. Once I have a section in JOSM then I can do things such as search for name=building and use the to-do list plugin to sort them out. Someone was kind enough to write me a script that detects buildings that overlap by more than fifty percent. Drop them in the to-do list and scroll through them one at a time and you can clean up a lot of duplicate buildings. In fact there aren't many left in Niger at the moment. The main problem seems to be HOT mappers who map few times then go off and do something else. Often the people leading the marathon don't really understand how things should be tagged. It's not just a problem in Niger by the way. Currently I'm scrolling through Niger and identifying settlements as landuse=residential and trying to ensure there is at least one highway that connects them to the road network. The idea being that you can then at least use routing software to find a way between any two settlements on the map. When I'm being good it is done systematically when I'm not so good it's spot a settlement and add it. I'm correcting highway=track to highway=unclassified as per the African highway wiki if it connects two settlements. I have been known to downgrade a highway=motorway when it runs between two small villages a kilometer apart. I note that different imagery is from different dates so a building might be on one set of imagery but not on another. Locally in Canada I've been known to add a build I can see that isn't yet on any imagery. Horning is also working through Niger cleaning up and mapping systematically in stripes across the country. Cheerio is a particularly English way to say farewell by the way. So Bye John On Sat, May 1, 2021, 18:39 Samaila Alio wrote: > Hi Cheerio, > > Aplolagies also for the late reply. > > Really it's an observation this last time when editing I meet a lot of > duplicated buildings. I have deleted a lot of them myself and I still come > across them. > I'm also surprised that there are 3 times duplication. I wonder if editors > are ignoring the warning messages when uploading data. > > I also noticed that users lack experience in the field on everything about > tagging. I encounter a whole concession mapped as a building despite the > non-existence of any building on the imagery. Building is considered by > some as building, a poor knowledge of English. > > > Regards, > > -- > Samaila > > Le mer. 28 avr. 2021 à 12:08, a > écrit : > >> Send Talk-ne mailing list submissions to >> talk-ne at openstreetmap.org >> >> To subscribe or unsubscribe via the World Wide Web, visit >> https://lists.openstreetmap.org/listinfo/talk-ne >> or, via email, send a message with subject or body 'help' to >> talk-ne-request at openstreetmap.org >> >> You can reach the person managing the list at >> talk-ne-owner at openstreetmap.org >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of Talk-ne digest..." >> >> >> Today's Topics: >> >> 1. Duplicate buildings in Niger (John Whelan) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Tue, 27 Apr 2021 18:23:23 -0400 >> From: John Whelan >> To: talk-ne at openstreetmap.org >> Subject: [Talk-ne] Duplicate buildings in Niger >> Message-ID: <28792fc7-e009-0ae8-5e47-cdd42fca41d6 at gmail.com> >> Content-Type: text/plain; charset="utf-8"; Format="flowed" >> >> Apologies for using English rather than French. >> >> Just a heads up in case someone wondered why the number of buildings on >> the map has dropped. >> >> I've sliced Niger up into sections and I'm currently looking for >> duplicate buildings. So far I've removed more than a thousand. They >> are inspected visually before being deleted so one of the duplicates are >> left behind and often the same building has been uploaded twice somehow. >> >> I've also picked up a number of areas that contain half a dozen >> buildings marked as a single building. These I've tended to change to >> place=neighbourhood. Has anyone any other suggestions? >> >> Thanks >> >> Cheerio John >> -- >> Sent from Postbox >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: < >> http://lists.openstreetmap.org/pipermail/talk-ne/attachments/20210427/198be564/attachment-0001.htm >> > >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> Talk-ne mailing list >> Talk-ne at openstreetmap.org >> https://lists.openstreetmap.org/listinfo/talk-ne >> >> >> ------------------------------ >> >> End of Talk-ne Digest, Vol 18, Issue 1 >> ************************************** >> > _______________________________________________ > Talk-ne mailing list > Talk-ne at openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ne > -------------- next part -------------- An HTML attachment was scrubbed... URL: