Your are totally right on splitting this key in parts. Thanks for picking up another problem in our tagging system of forests and trees.
I remember the discussions about "species" until we finally got it right and introduced "genus". Cheers fly Am 02.05.2014 21:56, schrieb Rudolf Martin: > Hi all, > > there are several tags to indicate vegetation with leaves, e.g. > "landuse=forest", "natural=wood", "natural=scrub", "natural=tree" and > others. > > Today we have one additional key "wood=" to describe the type of > leaves. This key is arguable. The oxford dictionary says: "wood = 1. > The hard fibrous material that forms the main substance of the trunk or > branches of a tree or shrub. 2. (also woods) An area of land, smaller > than a forest, that is covered with growing trees." > The usage of ''wood='' for the type of leaves is not suitable because > wood relates to the trunc, not to the leaves. Maybe it is suitable for > "natural=wood", but the key also relates to forest, trees, hedges and > shrubs. > > The values "wood=coniferous" and "wood=deciduous" are ambiguous. > ''Coniferous'' describes the kind of seeds, not the type of leaves, nor > the phenology. ''Deciduous'' describes the phenology, not the type of > leaves, but it seems that it is used for the leaftype. > > ''Coniferous'' stand for "cone-bearing seed plants with vascular > tissue". This plants are mostly needle-leafed, but there also exist > some with broad leaves. > > There is also the value "wood=evergreen" to describe the phenology, but > not the kind of leaves. This applies to needle-leaved and broad-leaved > plants. > > Other values are ''palm'', ''nipa_palm'', ''eucalypt'', ''filao'' and > ''casuarina''. > > There is no tagging for evergreen broad-leaved plants (e.g. most trees > in the rain forest), nor for deciduous needle-leaved plants (e.g. > larchs). > > It is very complicated to include all combinations of leave type and > phenology in one key, especially in consideration that the phenology is > not known in every case. > > We need two distinct keys to describe the type and phenology of leaves, > suitable for all kind of plants and all kind of keys. > > It is advantageous to use new keys, to avoid confusion with changing > values of an already used key. > > Proposal: > > "leaf_type=" describes the type of leaves, such as broad-leaved or > needle-leaved. > > "leaf_cycle=" describes the phenology of leaves, such as evergreen or > deciduous. > > > http://wiki.openstreetmap.org/wiki/Proposed_features/leaftype > > Rudolf > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
