[talk-au] Coastline rendering in Garmins Mapsource

[John Kitchener]

 Hi,

I guess this is an old issue; but there appears to be a problem when
displaying OSM coastlines in Mapsource. Have a squiz at these three images
of Noosa (QLD):

# Mapsource - good old Shonky looks - good
http://img651.imageshack.us/img651/9489/clipboard02j.jpg
# OSM <http://www.openstreetmap.org/?lat=-26.3806&lon=153.08917&zoom=15>  -
on the Web is good - http://img10.imageshack.us/img10/4807/clipboard03ph.jpg
# Mapsource - OSM is rubbish! -
http://img10.imageshack.us/img10/8682/clipboard04tf.jpg

Rivers get to be blue but the sea is invariably white with a demarcation
line somewhere at the mouth or up river. Tagging looks fine. The Mapsource
(and I presume GPS - I don't own a mapping Garmin) display problem could be
associated with a dis-continuous coastline polygon (the 'Coastline Error
Checker' shows a few current issues for Aus). I guess this is an ongoing
issue, as folk fiddle? 

However I also suspect there is some deeper issue, as NZ's coastline appears
to be a closed polygon; with the same problem. If anyone has info or
solutions for this problem, please advise.

 

In the meantime don't go boating with OSM aboard. J

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