[OSM-newbies] Estuaries and large bays

[Andrew Harvey]

On Thu, Oct 21, 2010 at 8:58 PM, Bráulio <brauliobezerra at gmail.com> wrote:
> Do you mean like this?
> http://www.openstreetmap.org/?lat=-5.75246&lon=-35.19664&zoom=17&layers=M
> It's a river, not a bay, but it's the same situation.

Sorry for the late reply. Yes, so here the area of water is defined by
a multipolygon as natural=water, with no coastline tag around the
edges of the water, but instead you just cut the coastline across the
river mouth/entrance.

When this was tried for some areas in my local area with natural=bay
instead of natural=water, with no coastline tag around the edge, and
instead cutting the coastline across the entrance, the bay rendered in
Mapnik as land, not water. I'm thinking this a bug in mapnik that I
should report, but I'm not really sure.


On Wed, Oct 20, 2010 at 11:50 PM, Richard Weait <richard at weait.com> wrote:
> Sometimes this doesn't work out.  In this example, Blue Lagoon, it
> looks like the coastline was adjusted as better data became available,
> but the bay was left behind.
> http://www.openstreetmap.org/browse/way/26700877

Yeh, in this example you can see that Mapnik doesn't render the
natural=bay area filled with blue, it just renders the name.