On Thu, Mar 13, 2008 at 6:15 PM, Frederik Ramm <[EMAIL PROTECTED]> wrote:
> Hi, > > > If I understand this correctly, then for a forested island in a lake > you'd > > need to have the island twice in the osm data. Once for the hole in the > lake > > and once for the forest on the island. > > No. > > Assuming for a moment that you really wanted to model the forest as a > "hole in the island", which doesn't make a lot of sense to me since I > don't generally map forests as holes in the country, but I understand > it's only a example, then the island would be there only once, be part > of two relations, one where it would play the "outer" role to the > forest and one where it would play the "inner" role to the lake. > > Bye > Frederik > I don't think he means a hole in the island. The island itself is just a simple, single polygon. I think his question is: Can the way which represents the island also be tagged with a forest which covers the entire island? In your original pseudocode, the forest bit would be ignored because only the lake tags would count. I don't see why you'd want to create yet another multipolygon relation with only one role (an "outer") as you've described. Karl
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