OpenStreetMap
The Cayman Islands are still broken, one week later.
Here's the current Mapnik render (look ma, no visible coastlines):
osm.org/?lat=19.258&lon=-81.264&zoom=11&layers=B00FTF
and the Osmarender (look ma, incorrect way directions):
osm.org/?lat=19.308&lon=-81.2&zoom=11&layers=0B0FTF
Osmarender looked fine last week (I think), but Mapnik render was still the same.
(previous diary entry, osm.org/user/lwu/diary/2810)
shadowjack merged the lines last week, apparently.
Discussion
Comment from lwu on 19 August 2008 ла 23:38
Loaded up Cayman Island in JOSM, but the Way seems properly counter-clock. It might just be a rendering issue? Osmarender doesn't get the land/water division right in some cases.
Comment from Deelkar on 20 August 2008 ла 02:20
check in JOSM (with middle mousebutton) wether there is only one coastline. check further that the coastline ways are all facing counter-clockwise around land (so that water is to the right side of the way) and then check the way is indeed closed.
Comment from Deelkar on 20 August 2008 ла 02:28
I just checked the coastline and found it ran CW around the island, basically marking it as water in water.
I reversed it, and it should start to show up in osmarender soon-ish.
Comment from shadowjack on 20 August 2008 ла 12:30
Now everything should be ok. I fixed final errors (there was leftover segment(two nodes) and Sand Cay was not closed).
osm.org/?lat=19.3081&lon=-81.2716&zoom=12&layers=0B0FTF
Zoom levels <12 will be updated later.
Comment from shadowjack on 20 August 2008 ла 12:31
opps...
rest of the message:
Zoom levels <12 should be updated later.
Comment from shadowjack on 20 August 2008 ла 12:32
Hmm.. comments do not like < sign
Comment from shadowjack on 20 August 2008 ла 12:33
Zoom levels < 12 will be updated later.
Comment from Deelkar on 20 August 2008 ла 18:52
The coastline need not be a single closed way, as long as the parts of the coastline have no gaps (ie. the end node is the start node of the next way) and do not branch, and keep to the water-right-hand-rule.
Comment from shadowjack on 20 August 2008 ла 20:43
I agree, it need not be closed. But sequence of ways must form closed shape. Sand Cay consisted of one (unclosed) way. It's error. After it was fixed, osmarender rendered tile fine.
Comment from lwu on 20 August 2008 ла 23:36
I suppose it'd be nice if the error showed up in the Coastline Checker, but when I tried it last, no such luck. I suppose the Checker works for many other cases though.