On Sunday 24 January 2016, Andy Townsend wrote: > What does "fen" means to you? > > I've a fairly good idea what I think it means, and I'd never or > almost never tag it as a natural feature (though it may have a name, > and the natural features within it may have names).
As a non-native English speaker i do not have a genuine understanding of the word fen but in terms of wetland types i consider fens peat producing wetlands with lower acidity and higher levels of nutrients and therefore hosting more diverse plant communities than bogs. There are boundary cases of course. > Could you come up with some examples of things that are currently > tagged as bogs but shouldn't be, or aren't tagged as fens but should > be (in the UK and Ireland would be helpful to me, as that's what I'm > going to be most familiar with, but obviously other places will be > helpful to other people). For the UK/Ireland this is difficult without local knowledge. Due to the climate and geology blanket bogs are very widespread there and the presence of a stream in the area for example does not necessarily mean it feeds the wetland - it can still be primarily fed by rainfall. Here in Germany with a drier, more continental climate you can pretty much rule out any wetland at the shore of a larger lake or next to a larger river to be a bog. Like: http://www.openstreetmap.org/#map=15/51.0768/12.4432 http://www.openstreetmap.org/#map=15/51.0303/12.4669 http://www.openstreetmap.org/#map=14/53.9642/13.1271 http://www.openstreetmap.org/#map=17/54.00570/12.12454 http://www.openstreetmap.org/#map=14/48.1004/11.1292 And if you look at http://taginfo.openstreetmap.org/tags/wetland=bog#map you can also see bogs mapped in regions (like Tunesia) where climate would not allow the formation of bogs. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
