[OSM-dev] osm2pgsql and only-named multipolygons

Richard Fairhurst richard at systemed.net
Wed Oct 5 14:59:01 BST 2011

Frederik Ramm wrote:
> While multipolygons with more than one outer *ring* are uncommon,  
> those with more than one outer *way* are heavily used where I live 

That's all right, everyone where you live uses JOSM anyway. :)

The issue from my point of view is one of UI. I can't countenance a UI, or a
render, that is any different for tagging shapes depending on whether they
have holes in or not.

So P2's tagging code would need to get some layer of indirection saying "if
this is a multipolygon, the tag panel needs to deal with the relation tags,
unless there are already tags on the way. Otherwise it needs to deal with
the way tags". Meanwhile, the rendering code would need to render fills
differently for items with more than one outer way (which is additionally
complicated by the fact they might not all be loaded yet).

That's far too much like brainache for me to want to code, especially when
that code will need rewriting in a year or so. But if someone else who does
come from a land where people use bonkers complicated multipolygons came up
with a decent patch, I imagine we'd be very happy to accept it.


View this message in context: http://gis.638310.n2.nabble.com/osm2pgsql-and-only-named-multipolygons-tp6858105p6862246.html
Sent from the Developer Discussion mailing list archive at Nabble.com.

More information about the dev mailing list