[mkgmap-dev] Coastline warnings for --generate-sea=polygons at tile border

Thu Jan 28 20:11:26 GMT 2010

Hi Mark,

On Wed, Jan 27, 2010 at 10:45:43PM +0000, Mark Burton wrote:
> Please try the attached new patch.
> 
> I can guarantee that that message will go away now because I removed the message!
> 
> Hopefully, the coastline will be OK too.

The patch that you attached is apparently included in your recent commit
burst (r1533; patch -Rp1 applied without conflicts).

I am still seeing it with unpatched r1533 (if we ignore the traffic_calming=*
that I added to the points file):

2010/01/27 23:40:12 WARNING (Osm5XmlHandler):   Way null (http://www.openstreetmap.org/browse/way/4611686018427418010) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=62.22656&mlon=25.82736&zoom=17) but they can't be merged because both are boundary nodes!

There are lots of other warnings for mlat=62.22656, because it is the
tile border and there are many lakes around that latitude.  (The district
around Jyväskylä is sometimes called the Lake-Finland (Järvi-Suomi).
I could probably reduce the amount of these warnings by moving the tile
border further to the south, but I would like to have mkgmap fixed.

I am also seeing many of these:

2010/01/27 23:40:08 WARNING (Osm5XmlHandler): Non-closed coastline segment does not hit bounding box: 279763707 (61,81651/30,07776) 279763719 (61,81599/30,07524) http://www.openstreetmap.org/?mlat=61.81651&mlon=30.07776&zoom=17

but they can most likely be attributed to Geofabrik's cutting
(Finland is about 60N,20E to 70N,30E).  Has someone already bugged
the osmosis or Geofabrik folks about this?  Could I work around the issue
with some mkgmap options?  I guess I'd want an imaginary L-shaped coastline
running south from the Swedish-Finnish border and turning east towards
St. Petersburg.

	Marko