[HOT] How newer mappers can help a lot with the validation process

john whelan jwhelan0112 at gmail.com
Thu Feb 11 15:47:54 UTC 2016

In there somewhere in a wiki or some such where we can document validation,
what works and why and what to look for?  Perhaps put down some sort of
service level agreement ie after validation we are only looking for what is
requested in the instructions and for a JOSM validotian to be run.  We
expect 97% of settlements to be mapped type thing? That way people who wish
to validate have something to feel confident about.

We need to get more people into validation.


Cheerio John

On 11 February 2016 at 09:56, Jo <winfixit at gmail.com> wrote:

> If such a volunteer becomes more confident after a while, they shouldn't
> hesitate to actually validate the task, if all was mapped well and they
> didn't have to add/change much.
> When I look at finished tiles, I start with the intention to validate it.
> If I have to do too much work on it, I will sometimes simply unlock once
> again, either leaving a note it's actually complete now.
> If there is still more work than I have time for at that time, it's better
> to "invalidate", so another mapper knows where more work is needed.
> Polyglot
> 2016-02-11 14:47 GMT+01:00 Blake Girardot <bgirardot at gmail.com>:
>> That is a good point John, if anyone does a second look to map in missing
>> buildings in a "completed" task square you should leave a comment on the
>> task square that says you looked over the completed task square and filled
>> in all the missing buildings you could find.
>> For sure it is not a waste of time to review completed task squares, but
>> I agree, it probably only needs one going over before validation.
>> In addition, this is a very helpful way for new mappers to become better
>> mappers and contribute to an urgent priority project to get done well and
>> fast.
>> Tiny task squares help, but stuff still gets missed and often we don't
>> get the validation stage completed in time, no matter how important it is
>> so an informal review makes a big difference if that is what a volunteer
>> wants to do and can contribute.
>> Cheers,
>> Blake
>> On 2/11/2016 2:33 PM, john whelan wrote:
>>> I'm not sure this is the best use of our very limited number of
>>> mappers.  Just scanning a tile takes time, so the optimum use of mapper
>>> time is to have them scan once when they map and have a validator scan
>>> once.
>>> For a productivity point of view its better to have new mappers split
>>> the tiles twice and map a tiny tile completely than have twenty of them
>>> go over the same area.  From the same point of view its better to have
>>> them map where we have good imagery than map where quote "You may have
>>> to squint a bit".  Mapping whilst squinting takes more time to map the
>>> same area than mapping where the imagery is good.  No matter where they
>>> map it will be useful to someone if not a short term MSF or American Red
>>> Cross project and to be honest if something like Ebola crops up having
>>> fairly good mapping of existing highways and villages in place before
>>> you start helps those projects in the field at least plan out what and
>>> where.
>>> Cheerio John
>>> On 10 February 2016 at 10:28, Blake Girardot <bgirardot at gmail.com
>>> <mailto:bgirardot at gmail.com>> wrote:
>>>     Hi all,
>>>     I just want to mention, that new mappers can really help with the
>>>     validation process by doing what they typically do: Map in roads and
>>>     buildings but into "Completed" task squares.
>>>     You do not need to mark a task square "Validated", but just
>>>     reviewing the completed squares and filling in missing things or
>>>     fixing up buildings that might not be mapped very well (squaring up
>>>     the rectangular buildings :) is immensely helpful.
>>>     I wrote a short OSM Diary entry that says basically the same thing:
>>>     http://www.openstreetmap.org/user/bgirardot/diary/36235
>>>     I just thought I would mention it because if you see projects on the
>>>     Tasking Manager that look "done" just know you can always help a bit
>>>     more by reviewing "Completed" task squares just to double check
>>>     nothing was missed even if you do not feel experienced enough to
>>>     "Validate" a task square.
>>>     This is especially true for projects where we have made a call for
>>>     more mappers on the email list or via twitter. Double and triple
>>>     checks to make sure the mapping in the instructions is actually
>>>     complete really helps in the process and gets the people on the
>>>     ground the best data we can possible generate for them.
>>>     Cheers,
>>>     Blake
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