> > 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) ? >
The wiki isn't very clear to me... For example, what is the difference between landuse=meadow+meadow=perpetual and natural=grassland? Landuse implies human influence, but the perpetual is for places where grass is naturally dominant. What? So it's grassland that is intensely used by humans, but you should know it would be a grassland even if people stopped using it? That doesn't sound interesting or common to me. Most people who use that tag should probably have used natural=grassland. Anyway, I have a double approach to this kind of problem personally. Feel free to criticize it :) The first is to not care too much, and use the tag as I see it used. In this case, meadow seems to be something quite broad according to the wiki and in current use in Belgium something grassy that has something to do with agriculture. The western part of your example looks like meadows to me. The part near the soccer field looks like having some leisure function as you say. The second is to try and improve tagging practices. But that is a long, painful and boring process. I always find much more fun things to do :) > I would be nice to have an easy way to ask for the proper landuse tags > by posting pictures. > > There was a German project where they asked mappers input about grassy areas, right? Only based on what was already mapped, not pictures. I think it's an interesting idea to this. I agree that the whole landuse/leisure/landcover tagging is a mess. Maybe doing a kind of survey with a few difficult cases might help in opening up the discussion to a wider audience. > 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 ? > This is in fact a problem of another order I think. This place simply has two uses. Those are always hard in OSM in my opinion. We just saw a florist+bar combination today in Brussels. My garden is a forest (really) and also, well, my garden; and then also part of a residential area. I think the need to classify something as "one thing only" has its limits. Sometimes you have to just admit there is no good solution if you try that. So it either becomes a X with Y, or a Y with X, or maybe an x with a nearby y. Reality is messy like that :) I do think that Karel's point that "landuse changes all the time" is relevant. I agree that a vague but correct general tag is better than a wrong specific tag. And the crops do change all the time. But changing from meadow to cropland is not that common in my experience, and it is in fact regulated by the government. I also think that slightly outdated landuse might be an excellent trigger for a user to finally decide "oh, that's annoying, but I think I can fix that myself". -- Joost Schouppe OpenStreetMap <http://www.openstreetmap.org/user/joost%20schouppe/> | Twitter <https://twitter.com/joostjakob> | LinkedIn <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/>
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