[OSM-talk] Detrimental to the OSM database

Sat Aug 23 01:03:41 UTC 2014

Hi Martijn

"MapRoulette challenges have been designed specifically with the 
armchair mapper in mind - no local knowledge should be required to fix 
what MapRoulette asks you to fix"

There's the fundamental flaw in these types of sites. Of course you need 
local knowledge.

Please provide "factual evidence" that it adds to OSM accuracy.
Please provide "factual evidence" that they are actual "fixes".

"MapRoulette gets help to some of the remote, forgotten places."
If they're that remote do they need "helping". Who's going to go there? 
& again prove the edits in those locations are accurate & genuine.

OK. First random from your site:
http://maproulette.org/#t=IT_WaterCrossings/IT_RXING_11.333811432368_43.474069354879
How can anyone who doesn't live in area (I tried to copy/paste the 
location but the info box disappeared!) possibly know which is correct?

http://maproulette.org/#t=osmose-8170-147-soccer/osmose-8170-147-soccer-None-d19295cc3e005283ae80b66bde86f474
Supposed missing soccer pitch in France. I mean, really?

I believe these sites add more inaccuracy than accuracy.

Dave F.

On 23/08/2014 01:30, Martijn van Exel wrote:
> Dave,
>
> MapRoulette challenges have been designed specifically with the 
> armchair mapper in mind - no local knowledge should be required to fix 
> what MapRoulette asks you to fix.
>
> If you can provide factual evidence that MapRoulette (or its new 
> cousin MapBoxRoulette) are causing significant harm to OpenStreetMap 
> data, please let me know and - at least for MapRoulette - I can see 
> about appropriate measures. These could include providing better 
> instructions, or even taking down a particular challenge - as I have 
> done in the past.
>
> My extensive experience preparing MapRoulette challenges, listening to 
> feedback from its users and looking at lots and lots of edits made by 
> MapRoulette users all point to the conclusion that this is a good way 
> to get a lot of eyes on particular problems, and get them fixed much, 
> much faster than would otherwise have been possible.
>
> In a perfect world, we’d have local mappers everywhere. In the real 
> world, we can use all the help we can get. MapRoulette gets help to 
> some of the remote, forgotten places.
> -- 
> Martijn van Exel
>
> From: Dave F. <davefox at madasafish.com> <mailto:davefox at madasafish.com>
> Reply: Dave F. <davefox at madasafish.com>> <mailto:davefox at madasafish.com>
> Date: August 22, 2014 at 6:16:33 PM
> To: Martijn van Exel <m at rtijn.org>> <mailto:m at rtijn.org>, 
> maproulette at openstreetmap.org <maproulette at openstreetmap.org>> 
> <mailto:maproulette at openstreetmap.org>, OSM Talk 
> <talk at openstreetmap.org>> <mailto:talk at openstreetmap.org>
> Subject: Re: [OSM-talk] Detrimental to the OSM database (was: Ways 
> needing smoothing back on track)
>
>> Hello All
>>
>> Please include all replies to OM-Talk:
>>
>> I was meaning to start a separate thread on this subject, but this 
>> seems the appropriate time & place.
>>
>> This website, along with http://osmlab.github.io/to-fix/ ( & maybe 
>> others) are encouraging errors to be introduced to the OSM database.
>>
>> For obvious reasons there's a discouragement of armchair mapping. 
>> These sites take it another step into inaccuracy by asking you to 
>> randomly correct a supposed error ( & I /really/ want to emphasise 
>> 'supposed') that the user can have no factual knowledge of whether 
>> the error is true or not.
>>
>> I live in the UK. How can I possibly know if there's genuinely a 
>> "sharp angle" in Arizona or there's something less than 2 metres away 
>> from another object that should be connected in Cambodia?
>>
>> IMO these websites are detrimental to the OSM database & should be 
>> rescinded.
>>
>> Dave F.
>>
>> On 22/08/2014 22:25, Martijn van Exel wrote:
>>> Hi all - just wanted to let you know that the ‘Ways Needing 
>>> Smoothing’ MapRoulette challenge is finally being updated again. It 
>>> used to consist of mostly false positives for the past week, and 
>>> there still are some, but there should be some fun to be had there 
>>> still :)
>>>
>>> http://maproulette.org/#t=waysneedingsmoothing/
>>>
>>> It’s still U.S. only :( but we’re getting closer to being able to 
>>> doing it for other countries as well.
>>> -- 
>>> Martijn van Exel
>>>
>>>
>>>
>>> _______________________________________________
>>> talk mailing list
>>> talk at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/talk
>>
>>
>>
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