Thank you for the links. Note that the page about the selling options
raises more questions than it answers (how common are the listed
options?). While it is incidental that auction houses may also be
equipped with a stockyard if they also hold livestock auctions, this
is not a necessity for some of the options. Although, I acknowledge
that the few USA livestock "market" POI I've checked in OSM were
placed near barns by farm owners, so calling them "auction houses"
seem a bit stretch.

It looks like we are going to be having separate tagging conventions
for livestock auctions compared to livestock markets, as it would
probably not be comfortable for mappers in the USA and Australia to
add auction=yes to every livestock auctioning marketplace without
presets.

The working of a common market is different from an auction house. In
the former, the seller bring a few of their own home produce, remains
at their table all day long, waiting for potential customers and
working with average prices. This method can work even in case of very
low attendance, as unsold items could be brought to market on the next
day as well. While auctioning of items can be a much quicker
undertaking, especially for big producers having a large number of
items for sale.

From the viewpoint of a buyer, you can come to the marketplace at any
time when it is open to purchase a given good, while you will need to
attend an auction according to a fixed schedule if you want to get
something, although at the end of the day, you may leave empty handed.

I don't feel strongly about the exact tags we will use for this
purpose, although putting livestock auctions below the general concept
describing auction houses that can auction various things can have its
advantages. For example:
amenity=auction_house + auction=livestock;grain
amenity=auction + auction=livestock;grain
I'm not sure what other kind of merchandise you sell through auctions,
the most common ones around here deal with vehicles, antiques, art,
jewelry or real estate.

Here's the alternative:
amenity=livestock_auction
The problem with this one is that I have a feeling that mappers would
try to abuse it by typing livestock_market by choice or by accident,
however that is a separate concept in other parts of the world.

As hinted earlier, most towns around here hold frequent livestock
markets ("állatpiac") at a fixed place similar to how common markets
("piac") are being held on certain days. For smaller communities and
less common livestock, livestock trade shows (fairs,
"állatbörze"/"állatvásár") are being organized in various regions,
sometimes on areas dedicated for this purpose, while at other places
on common grounds. On both of these, haggling is the common purchase
method, not auctioning.

According to our tax office, we also have a legal category for
livestock auctions ("állatárverés"), although they seem to be rarely
held.

This is how a livestock market/fair looks like:
https://www.programturizmus.hu/ajanlat-dunafoldvari-orszagos-allat-es-kirakodovasar.html
https://www.szoljon.hu/cimke/allatvasar/

Here's how common they are, although many do not possess online presence:
https://www.programturizmus.hu/ajanlat-allatvasar.html
http://www.vasarokfesztivalok.eoldal.hu/cikkek/orszagos-vasarok--a---k-/

According to Wikipedia and personal experience, It is customary to
classify marketplaces by function:
marketplace=livestock/antique/farmers/fish/flea/flower/craft

I feel that farmers' market, fish market and crafts market are related
and may perhaps be combined into a single category of "producers'
market", but do share what you think about this. This term is mostly
used in connection with farmer's (and artisanal handicraft) markets in
Hungary, as fish markets are rare, but we have a lot from every other
category.

On Tue, Apr 16, 2019 at 1:47 AM Graeme Fitzpatrick
<graemefi...@gmail.com> wrote:
>
>
> On Tue, 16 Apr 2019 at 06:52, bkil <bkil.hu...@gmail.com> wrote:
>>
>> Warin did not mention how they are purchased, i.e., whether an auction
>> is being held
>
>
> Yep, as mentioned previously, livestock are (almost ?) always sold via 
> auction. Have a look at https://www.facebook.com/watch/?v=2082183102010269 
> which shows a little bit of the auction process in the background.
>
> Another description of it is: 
> http://www.mareebasaleyards.com.au/index.php?option=com_content&view=article&id=53:purchase&catid=31:general&Itemid=46
>
>>
>> This sounds like a different feature:
>> https://en.wiktionary.org/wiki/stockyard
>> "(US) An enclosed yard, with pens, sheds etc. or stables, where
>> livestock is kept temporarily before being slaughtered, treated, sold,
>> or shipped etc."
>
>
> Yes, that's a yard where stock is held. A sales yard is like this 
> http://www.dalbyregionalsaleyards.com.au/about/ which is broadly similar, but 
> not quite the same.
>
>> I'm still looking for the answer regarding the ratio of auction vs.
>> haggling in USA livestock markets/auctions,
>
>
> Not easy to find, but here's some info: 
> https://www.farmanddairy.com/news/how-to-understand-the-livestock-markets/308078.html
> which seems to suggest that most are sold by auction?
>
> Australian info says the same thing: 
> https://www.mla.com.au/research-and-development/preparing-for-market/selling-options/
>
> Thanks
>
> Graeme
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