On the natural=tree page I stumbled over the phrase:
"Tree rows ... This approach can also be combined with individually mapped trees for
further details."
On natural=tree_row I found it was part of the 2010 proposal which said:
"if individual trees in a tree row are mapped, the tree nodes should be part of the tree row way.
Usually, however, it's not necessary to map the individual trees in a tree row."
In the discussion this was reasoned with:
"...connecting the trees with a way allows renderers to generalize the tree row into a single
entity, rather than showing each tree separately"
IMHO this violates the one object - one OSM element principle. Either I choose the coarser approach
to map a way for the row, or I refine it to individual trees, but should not use the row anymore.
If a renderer wants to cluster any trees that can be done algorithmically.
I suggest to remove the idea that tree and tree_row could be combined,
or even declare it should not be done.
tom
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