[OSM-newbies] Coastline

[Martijn Verwijmeren]

Hi,

If you look at Antigua with the coastline error checker [1] today. You
can see four red circles. They pinpoint trouble spots. Zooming in to
level 16 on each circle and then loading these views into JOSM would
have shown you four incorrectly drawn polygons (for small islands in
front of the coast of the large one). The last point of each polygon
wasn't equal to the first point, but to the second point. I fixed all
four of them, so tomorrow the red circles should be gone from the
coastline error checker and your coastline should hopefully work OK with
Osmarender.

One other thing I noticed is that you have one very long coastline
way (2556 nodes). IIRC it was better not to make ways that long (>1500
nodes??). Maybe somebody who knows this for sure can comment on that.

m.v.g.,
Cartinus

[1] http://tile.openstreetmap.nl/coastlines.html


On Tue, 29 Jan 2008 10:47:21 -0400 (Atlantic Standard Time)
"Douglas Luery" <Douglas at Luery.com> wrote:

> I was hoping Eric Brelsford request for help (7th Jan 08) in creating 
> coastline" would have resulted in help/hints – unfortunately I did
> not see any.
>  
> I have, after a fair amount of struggling, managed to complete the
> coastline of Antigua in the Eastern Caribbean (Shown on the world map
> by the capital St. Johns")
> Only to find after a couple of weeks that when viewed in Osmarender,
> two significantly large portions of the coastline have disappeared -
> it appears that two large tiles, on the once coastline, have become
> designated as land, with land now going miles out to sea, -
> completely messing up the mapping of Antigua . 
>  
> I am at a loss how to correct this as the affected areas are one
> complete way" of coastline passing into and out of the two erring
> tiles but show correctly in the neighboring tiles.
>  
> Help!
>  
> Douglas Luery