Julien, As for the warnings, can you let us know the exact warning ? Most likely it has something to do with an impossible combination of 2 multi polygons e.g. nested outer polygons or touching inner/outer polygons.
As for the mapping, it depends on whether Forêt d'Anlier can be be mapped as -1 polygon. This would mean that the area is without holes or gaps. - otherwise you have to use a multi polygon, but then it depends on whether all the different parts are indeed landuse=forest or whether to want to include grass fields scrub etc to the area. In the former case you can just put landuse=forest on the relation. In that latter case you might have to tag the relation as type=multipolygon; place=locality or perhaps as some protected area. - If it is a closed area, you could also use a multi polygon relation of many ways, just as we do for administrative boundaries. The rest of the tagging still depends on whether you have to combine multiple landuses or not. The latter case is what the Dutch community tried to solve with the toponym-relation. However, this is not documented and not understood by data consumers. I had a private conversation about this with dieterdreist that I will send you in a private mail. So there are still many choices, but I hope this information helps you a bit to pick a solution that suits you and the situation best. have a nice weekend m On Fri, May 5, 2017 at 12:00 PM, Julien Minet <jumi...@gmail.com> wrote: > Hi list, > > Recently, I merge several polygons together to create a multipolygon "Forêt > de Rulles", which has now a osm id for itself. I'd like now to merge several > polygons together to form the Forêt d'Anlier, 7000 ha, the biggest mostly > deciduous forest of Belgium. My goal is to create a unique object named > "Forêt d'Anlier", and eventually link this object with its wikipedia page. > > But to do this, I identified 7 multi-polygons and 3 simple polygons to > merge, accounting for a total of 49 closed ways! I plan to do it by taking > the multipolygon with the highest number of polygon and add the other ways > of the others MP, but... > > it takes time to do so, can I simply add a multipolygon to another > multipolygon? it seems possible in JOSM (I tried) but it gives a warning. > is it a good idea to create such a big MP? If not, what can be the > alternative to give the name "Forêt d'Anlier" and other tags to this large > forest? > > > Julien > > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-be > _______________________________________________ Talk-be mailing list Talk-be@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-be
