[HOT] Mapping buildings with new mappers at a maperthon

Bjoern Hassler bjohas+mw at gmail.com
Mon Nov 20 13:05:18 UTC 2017


Dear friends,

thanks for the replies and engaging discussion. Can I propose that we start
a google document to put down some of the ideas, and perhaps organise a
follow-up chat or community seminar where the ideas can be discussed
further? Outcomes can then be added to  http://learnosm.org/en/
coordination/mapathon/ ?

I'll send you all invites to the document off list. I'll leave the document
so that no sign-in is required, in case you don't want to have a google
account!
Bjoern

On 20 November 2017 at 12:53, john whelan <jwhelan0112 at gmail.com> wrote:

> The interesting thing is when the very experienced iD specialist mapped a
> building they did it by placing a dot in the four corners of the building
> then the ways and tag were added very quickly by a short cut perhaps?
>
> By placing the four corners first you could see clearly where they should
> go.  I don't know how it was done but as an interim measure perhaps we
> could teach this method of mapping buildings?
>
> Cheerio John
>
> On 20 November 2017 at 07:36, Stuart Ward <stuart.ward at bcs.org> wrote:
>
>> Having spent considerable time fixing iD editor squares non-square
>> buildings, with random shared nodes, connected to roads, and areas, getting
>> a better first time result is so important.
>>
>> I pains where you come across a square that they have clearly spent quite
>> a lot of time mapping all the ins and outs of buildings.
>>
>> Stuart
>>
>> --
>> Stuart Ward M +44 7782325143 <+44%207782%20325143>
>>
>> On 19 November 2017 at 15:52, Blake Girardot HOT/OSM <
>> blake.girardot at hotosm.org> wrote:
>>
>>> Hi,
>>>
>>> A lot of this would be addressed if iD had a building mapping tool
>>> like JOSM does. I am going to restart the effort to get that added in
>>> to iD, I have some new ideas for how we might be able to accomplish
>>> it. I think it would save literally hundreds of hours volunteer time
>>> fixing buildings that are mapped by new mappers and help new mappers
>>> increase their productivity and accuracy.
>>>
>>> iD is by far the more approachable editor for OSM, it runs on any
>>> desktop or laptop with zero installation issues and has a great
>>> built-in tutorial, so I think we would be well served by helping
>>> improve iD.
>>>
>>> If there are any JS wizards out there who want to help complete the
>>> building tool for iD (it is already started, just not completed)
>>> please contact me directly :)
>>>
>>> Cheers,
>>> Blake
>>>
>>>
>>>
>>> On Sun, Nov 19, 2017 at 3:40 PM, john whelan <jwhelan0112 at gmail.com>
>>> wrote:
>>> > and I totally concur with what Ralph has said.
>>> >
>>> > We asked people who were attending to install JAVA before they arrived
>>> and I
>>> > had josm-tested.jar available on a DVD to minimise the stress on the
>>> wifi
>>> > network. I had a USB DVD device with me and a bag of mice. The
>>> particular
>>> > maperthon I was at was a one off affair but we had someone from the
>>> local
>>> > OSM group mention how to find the monthly meetings where mapping took
>>> place.
>>> >
>>> > Note I had two machines available that had JAVA, JOSM with the plugins
>>> > already installed so it was just a matter of "come in, sit down,
>>> create an
>>> > account, wiggle the mouse now you've mapped your first building."
>>> Upload,
>>> > then we got them to install JOSM on their own machine and when we
>>> downloaded
>>> > the tile again their previous mapping was there which reinforced the
>>> idea
>>> > that they were mapping on a live database.
>>> >
>>> > It could be just me but my feeling was we got a bit more engagement
>>> with
>>> > JOSM as they could see the underlying tags and having shown one mapper
>>> how
>>> > to join up two rectangles for an L shaped building I asked them to show
>>> > another mapper how to do it when they wanted to know which helps on the
>>> > confidence building side.
>>> >
>>> > For highways there is less to choose between the two editors but for
>>> > buildings certainly for accuracy currently JOSM and the building_tool
>>> plugin
>>> > wins hands down.
>>> >
>>> > I think the large maperthons have their place but perhaps we need more
>>> > mini-maperthons?
>>> >
>>> > Cheerio John
>>> >
>>> > On 19 November 2017 at 03:07, <ralph.aytoun at ntlworld.com> wrote:
>>> >>
>>> >> A useful guide to running your Mapathon can be found here
>>> >> http://learnosm.org/en/coordination/mapathon/
>>> >>
>>> >>
>>> >>
>>> >> There is no hard and fast rule to running a successful Mapathon. As I
>>> >> point out, each Mapathon will evolve at it’s own pace and in it’s own
>>> >> direction dependent the expertise of the people organizing and
>>> leading, on
>>> >> the people attending, the facilities available and the number of
>>> people
>>> >> involved.
>>> >>
>>> >>
>>> >>
>>> >> As to the choice of Editor used, I agree with John that JOSM is
>>> preferred,
>>> >> unfortunately that choice is not always available. We have found that
>>> >> dealing with new mappers using school or corporate computers/laptops
>>> it is
>>> >> not always permitted to download other programmes, or if you have a
>>> large
>>> >> group uploading/downloading at the same time can cause problems for
>>> the
>>> >> available WiFi, and with one really large group we overloaded the OSM
>>> >> server. So our choice is to start the large group of new mappers with
>>> iD
>>> >> Editor so that we can get them mapping as quickly as we can and then
>>> deal
>>> >> with any questions they have during the session.
>>> >>
>>> >>
>>> >>
>>> >> I do not count any success on how many squares have been completed
>>> >> although it is encouraging to the group to be shown at the end how
>>> much
>>> >> their contribution has advanced the project they are working on. I
>>> prefer to
>>> >> concentrate on getting the mappers to a stage where they are
>>> comfortable
>>> >> with their mapping and confident enough to try mapping further on
>>> their own
>>> >> at home and hopefully interested enough to return for further
>>> guidance.
>>> >> Going around the room and looking at what they are doing is paramount
>>> to
>>> >> this success. Telling them that they have got it and their work is
>>> good
>>> >> gives them the assurance they need to continue and even become more
>>> >> adventurous, so John is correct in saying that the one-to-one does
>>> show more
>>> >> promise and achieve better mapping. Even stopping to show a new
>>> mapper how
>>> >> to improve and correct their work has a very positive effect on their
>>> >> confidence.
>>> >>
>>> >>
>>> >>
>>> >> Working with small groups definitely is an advantage because of the
>>> >> personal attention they can get, but will be more effective it you
>>> can get
>>> >> them meeting on a regular basis to build on their experience and
>>> skill with
>>> >> the various tools on JOSM.
>>> >>
>>> >>
>>> >>
>>> >> At the London monthly Mapathon we have three training sections
>>> running at
>>> >> the same time … iD , JOSM and Validating. And it is up to the
>>> individual as
>>> >> to which session they sign up to. If they want to start straight away
>>> with
>>> >> JOSM they are welcome to do so. The mappers know that there is going
>>> to be a
>>> >> Mapathon on the first Tuesday of every month so it becomes a fixed
>>> date on
>>> >> their calendar which does help with returning mappers. We also keep
>>> the
>>> >> email addresses of attendees and they will get invited back to future
>>> >> Mapathons with an Eventbrite invitation.
>>> >>
>>> >>
>>> >>
>>> >> As a guide to success I would point you to the fact that most of the
>>> >> trainers at the London Mapathons started off as newcomers and have
>>> stayed
>>> >> and progressed, a number of attendees have gone on to start up mapping
>>> >> groups at their universities. Also at universities and corporate
>>> offices
>>> >> where we have run Mapathons they have started up inhouse Mapping
>>> Parties and
>>> >> Mapathons of their own.
>>> >>
>>> >>
>>> >>
>>> >> Martin Dittus gave us some statistics early on in the process of
>>> evolving
>>> >> the London Mapathons which showed approximately 30% return rate but it
>>> >> tailed of quickly, which is why we decided to offer the returning
>>> mappers
>>> >> the option of going onto JOSM, this helped the retention of mappers
>>> and now
>>> >> we also have a MidMonth Mapathon for experienced JOSM mappers to get
>>> >> involved in more advanced work.
>>> >>
>>> >>
>>> >>
>>> >> To sum up, yes JOSM is desirable in getting good building mapping and
>>> very
>>> >> definitely when the mapping moves into dense city centres or slums
>>> where
>>> >> they are built butting up against each other. But then for people
>>> with no
>>> >> previous map experience the learning curve is very steep, having to
>>> learn
>>> >> about OSM, the Tasking Manager, the Editor, read Satellite Imagery,
>>> drawing
>>> >> the features and also tagging correctly so reducing this slightly by
>>> using
>>> >> the iD Editor to start with does make sense when you have a limited
>>> time to
>>> >> get them started.
>>> >>
>>> >>
>>> >>
>>> >> If you have any questions regarding getting started or running your
>>> >> Mapathon feel free to email me and I will try to help where I can.
>>> >>
>>> >>
>>> >>
>>> >> Hope some of this might be useful.
>>> >>
>>> >>
>>> >>
>>> >> Regards
>>> >>
>>> >>
>>> >>
>>> >> Ralph
>>> >>
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> Sent from Mail for Windows 10
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> _______________________________________________
>>> >> HOT mailing list
>>> >> HOT at openstreetmap.org
>>> >> https://lists.openstreetmap.org/listinfo/hot
>>> >>
>>> >
>>> >
>>> > _______________________________________________
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>>> > HOT at openstreetmap.org
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>>> >
>>>
>>>
>>>
>>> --
>>> ----------------------------------------------------
>>> Blake Girardot
>>> Humanitarian OpenStreetMap Team
>>>
>>> _______________________________________________
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>>> HOT at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/hot
>>>
>>
>>
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