This is what I've been using as a reference.

http://wiki.openstreetmap.org/wiki/OSM_Tasking_Manager/Validating_data

> On Jul 11, 2016, at 12:00 AM, Heather Leson <[email protected]> wrote:
> 
> Has anyone written a guide to validation?  I dont recall seeing it.  This 
> might help in a few ways:
> 
> 1. Documenting knowledge
> 2. Advancing process
> 3. Talking points for those running mapathons
> 4. Diagrams of a "validated edit" vs "needs rework"
> 
> Heather
> 
>> On 10 Jul 2016 21:52, "Dan Joseph" <[email protected]> wrote:
>> Is this in areas with dense structures and instead of trying to trace each 
>> building the mapper has just traced around the entire group? Or the mapper 
>> has just incorrectly used the building key when they should use the landuse 
>> key? If the area is particularly large I would think the JOSM validation 
>> process might flag the issue via a 'building inside building' error or some 
>> sort of features overlapping/crossing error. 
>> 
>> If multiple mappers from the same mapathon make the mistake, it may be 
>> productive to reach out to the mapathon organizer and ask them to spend a 
>> little more time at their next event going over how to map buildings and tag 
>> them correctly.
>> 
>> While some mapathon mappers do only map once and never again. Mapathons are 
>> a great way to introduce people to OSM and also result in long-term 
>> contributors.
>> 
>> All the best,
>> Dan 
>> 
>>> On Sat, Jul 9, 2016 at 2:48 PM, john whelan <[email protected]> wrote:
>>> When validating I'm seeing number of cases when building=yes, residential 
>>> or house is used to tag landuse=residential.
>>> 
>>> Going through a to-do list and checking every building doesn't cut it for 
>>> me.
>>> 
>>> In general these are maperthon mappers of the type I call disposable 
>>> mappers so leaving feedback really doesn't work.  They map once and that's 
>>> about it.
>>> 
>>> Any suggestions on how to catch them.  I have noticed that 
>>> building=residential is often used in this way.  Having smaller tiles helps 
>>> as you get fewer mappers completing the tiles and once I spot one by a 
>>> particular mapper then I can roll out the to-do list plugin.
>>> 
>>> Thanks John
>>> 
>>> 
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