[HOT] Buildings and HOT's reputation in OSM

Blake Girardot HOT/OSM blake.girardot at hotosm.org
Tue Dec 12 14:57:40 UTC 2017


Hi Walker,

There is a renewed effort that I think has a good chance of success at
building a tool into the iD editor where it is most needed.

I am not sure a stand alone editor is a good idea for a couple of reasons
and think integrating a tool into the iD editor is by far the best solution.

If anyone wants to be a part of the current effort to build it into iD or
contribute to iD in general just join the OSM general slack at
https://osmus-slack.herokuapp.com/

Cheers
blake



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On Tue, Dec 12, 2017 at 3:40 PM, Walker Bradley <wbradley at worldbank.org>
wrote:

> Dear All,
>
>
> There has been a lot of back and forth regarding the utility of a
> specialized building editor in iD editor.  Many have mentioned how they
> would like it, but lack the skills in designing it.  How much would it cost
> to hire someone to program this, How would it be integrated with the
> existing editor and What would the skills required be for the person(s)?
>
>
> Best,
>
>
> Walker
>
>
> ------------------------------
> *From:* john whelan <jwhelan0112 at gmail.com>
> *Sent:* Tuesday, December 12, 2017 09:24
> *To:* Rory McCann
> *Cc:* HOT
> *Subject:* Re: [HOT] Buildings and HOT's reputation in OSM
>
> A specialised buildings editor idea has a lot of merit.  Less to train,
> fewer options to go wrong.  Background upload after each building or set
> time.
>
> The problem with Bjorn's idea is unfortunately anyone can lead a
> maperthon.  The HOT Training group meets regularly and at least one of the
> members has a lot of experience leading maperthons.
>
> My perception is the regular ones have fewer problems its the ones being
> led by well meaning people with no experience in OSM mapping who don't read
> the instructions first and give incorrect instructions to mappers.
>
> Locally we had one very well meaning person but unfortunately the mappers
> edited the map and introduced a fairly large number of errors.  It was
> caught and many changes were reversed but that caused more problems as the
> students had been given the task as an assignment and some of their edits
> had disappeared.  It did all get straightened out eventually.
>
> Cheerio John
>
> On 12 December 2017 at 08:31, Rory McCann <rory at technomancy.org> wrote:
>
> It seems like there is a need for a specialized "buildings editor". Yes
> JOSM building_tools beats iD now, but how about making a new web based
> editor that addresses the problems you highlight:
>
>  * Can only enter buildings
>  * Uploads (& downloads) frequently. Potlatch used to upload as soon as
> you had deselected an object. OSM changesets can be opened and have many
> uploads. Why not upload every X minutes?
>  * Rather than free form drawing, you can only draw rectangular buildings
>  * Don't allow the user over lap buildings (or auto-merge the rectangles
> together)
>
> If you know your users are doing one thing, then it's probably easier to
> change the software than the users. 😉
>
> Of course, suggesting things is easier than actually doing them, and I
> don't think my JS is good enough to do it.
>
>
> On 09/12/17 20:59, john whelan wrote:
>
> Recently there has been some discussion of HOT's input into OpenStreetMap
> in the OSMF mailing list.
>
> Perhaps one of the problem areas is mapping that is less than ideal.
>
> Basically HOT mainly maps highways, landuse=residential and buildings.
>
> These shouldn't be difficult to map correctly.
>
> Buildings appear to be the most problematic.
>
> I think we need to think about why we are mapping them.  Is node good
> enough?  There would be less room for mistakes.
>
> If we need outlines and there good reasons why an outline is more valuable
> than a node then we need to define what is acceptable.  Or do we even
> care?  and its the do we even care part that is perceived to be the case by
> some within OSM and that perception is something we should care about.
>
>  From a validation point of view does it matter if the building is not
> square?  Is it acceptable to square a building even though we know this
> will introduce an element of approximation or error.
>
> What should be done with a building=yes that covers more than one
> building?  Do we expect the validator to map each building or just
> invalidate the tile?
>
> What should be done when the building mapped is more than 50% larger than
> the image?  Invalidate the tile?
>
> We are still mapping buildings twice.  I suspect some mappers are not
> uploading within two hours.  Getting mappers to upload every 30 minutes max
> would go a long way to reduce this, extending the tile lock to four hours
> would almost certainly eliminate it.  Recently on high priority project
> I've seen in the order of a hundred buildings double mapped.  They have
> been done within the last two weeks so it is an ongoing problem. There is a
> new tool that detects these so they aren't the problem they once were but
> someone has to run the tool.
>
> If HOT could support a few more projects that were from the community on
> the ground rather than the "We are the professionals we know what is best"
> which appears to be perceived sometimes from the number of projects for the
> RED Cross or other northern hemisphere charities that might also help the
> reputation and relationship.
>
> So two points here on one message first is can HOT's reputation be
> repaired and I suspect that is longer term problem that will take time and
> a lot of effort rather than a PR job.
>
> Second would someone care to comment on what is acceptable mapping for a
> building and what guidelines can we give to validators?
>
> Thanks John
>
>
>
>
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-- 
----------------------------------------------------
Blake Girardot
Humanitarian OpenStreetMap Team
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