[OSM-talk-be] Fwd: [OSM-talk] Upcoming removal of landuse=farm in the standard style

[Karel Adams]

On 26/03/17 19:10, Marc Gemis wrote:
> here is another example I met today
>
> location : http://osm.org/go/0ErT_~pXR-?m=
> picture: https://xian.smugmug.com/OSM/OSM-2017/2017-03-26-Dessel/i-VvGqfPV/A
>
> It's clear that the left part on the picture (north on the map) is
> cultivated land, the grass is greener. I assume it is
> landuse=farmland. I doubt it's meadow, as there is no fence, so you
> can't keep cows on it. I think it's grass now, but they will place
> some crop on it later on in the season.
>
> The part on the right is clearly different. More like
> natural=grassland. There were even some boundary stone separating both
> areas. How should I map the southern part ? I don't think it's a
> meadow nor a land to grow crop.

It has already been pointed out: landuse is not a constant. What is 
cropped for hay one year can be growing beetroot or potatoes the year 
after and later still become pasture. Unless one is prepared to look 
over each single bit of farmland at least once per year (for which I do 
not think we are in sufficient numbers today) my vote is for only 
tagging landuse=agricultural or landuse=farmland. Better to give less 
but reliable detail. "landuse=meadow" could be used in some specific 
cases, like aerodromes. And even then: the bit of land at 
#map=18/51.21083/5.47755, South of the runway, is left barren some 
years, in other years the owner (who also owns the little airfield) will 
grow maize on it. The bits east and west of the runway could be mapped 
as "meadow" though, they are presently tagged "farmland".

KA

PS Pour la petite histoire: I once came close to flying INTO the maize - 
that runway is awfully short, and the bit of wood further to the South 
is very good for creating turbulence...
>
> m.
>
> On Fri, Mar 24, 2017 at 7:29 PM, Marc Gemis <marc.gemis at gmail.com> wrote:
>> On Fri, Mar 24, 2017 at 5:04 PM, joost schouppe
>> <joost.schouppe at gmail.com> wrote:
>>>> Please help me with the cleanup of the area around Reet. I honestly
>>>> cannot remap all landuse=farm there based on imagery, although I know
>>>> the area more or less. :-)
>>>
>>> I'll have a look :)
>>> What would you prefer for "unsure from imagery"? Just nothing, or a polygon
>>> tagged fixme? Or something else?
>>>
>> Teach me how I can determine the right tags from imagery. During my
>> lunch break today I was working on the area south of the Pierstraat
>> and north of Voetweg 32 http://osm.org/go/0EpHov3c-- and further to
>> the east/north east.
>> I wonder which tags others would use for the areas covered with grass.
>> Are there people that are immediately convinced that those areas are
>> meadows ? Or are you in doubt, perhaps just grass, or even
>> recreational areas (west of the soccer field) ?
>>
>> I am mostly interested how other people decide the right
>> landuse/landcover/natural tag.
>> Even with pictures from surveys I wonder which tags I should use. What
>> for areas that are clearly meant for keeping horses, or wet meadows.
>> There are so many tags to chose from.
>>
>> A recent problem I had was to tag
>> https://xian.smugmug.com/OSM/OSM-2016/2016-11-20-Vremde/i-L3kGV6K  Is
>> this really a meadow ? Can have a meadow so many trees ? Or is it an
>> orchard (I don't know a lot about trees), with a lot of grass ?
>>
>> I would be nice to have an easy way to ask for the proper landuse tags
>> by posting pictures.
>>
>> m.
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