Private vs. public does not matter. Private gardens with some trees in it are not a forest. A tree row in a field is not a forest for me.
According to Wikipedia [1] there are hundreds of different definitions of forest. Not only that, some people are only interested in mapping "groups of trees" so the map is nicely coloured. For me, a forest is more than just a group of trees. I don't have a ready to use definition so there are many grey areas left. But think about a park but with less human shaped areas (grass, ponds, benches, waste bins), but still maintained by humans. It includes trees but can also include bushes, plants, flowers, grass, ponds, streams and paths/roads. Typically the paths are not as well maintained as in parks. Please note that is how I see parks/forests in Belgium, other countries can have different definitions. For me, the current data is only fine to see some colour on the map. I wonder how people that really work with this type of landuse/landcover data think about the OSM-data. I know about one scientific article that even recommends OSM for landuse/landcover.(don't have the URL here). So perhaps it is not so bad, and it's only my idea of a neatly structured landuse/landcover separation that finds the data useless for other purposes. As to Peter, I have written my rough ideas on landuse/landcover 2 years ago or so on the Belgian mailing list. While there are others that share the landcover vision, we have not done anything with it. There are still many open issues: landuse/landcover/leisure/surface/natural all overlap in some ways. Even the building tag overlaps with the landcover tag. If you define a different system, where do you draw the line? What do you want to map in another way ? And even if we agree, it would take too long to revisit all place and redo the armchair work that created the current landuse mapping in Belgium at this moment. But I haven't seen any reply on how I should map * trees in gardens or in a meadow or any other area whose primary function is not "trees" ( (using overlapping landuse ?) * where the name of the forest has to be placed when one uses a multi-polygon to exclude ponds from the tree covered areas. So Mateusz, Andy, how do you solve those problems ? [1] https://en.wikipedia.org/wiki/Forest On Wed, Jun 13, 2018 at 9:21 AM Mateusz Konieczny <matkoni...@tutanota.com> wrote: > > > 13. Jun 2018 07:47 by marc.ge...@gmail.com: > > won't work, see e.g. > https://www.openstreetmap.org/search?query=waasmunster#map=16/51.1215/4.0932&layers=N > that's not a forest, that are a lot of private gardens with trees in it. > > > I opened https://www.openstreetmap.org/note/1424854 - somebody included also > areas > > without trees. > > > A forest is a place where you can walk, ride, cycle. Not someones > private backyard. > > > So you want to count tree-covered areas that are not private? (including ones > in private backyards). > > > I think that it is not doable with current OSM data (access=private is > extremely rarely > > tagged on private areas) though excluding areas tagged also as > landuse=residential > > may be a good approximation. > > > > Our government talks often about there is so many square meter of > forest in Belgium. > It's not sufficient to subtract all small areas, you need to subtract > somehow everything that is not a forest (see above) > > > So do you want to exclude private forests or something else? > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
