[mkgmap-dev] Flooded islands

Mon Mar 15 09:10:56 GMT 2021

Hi

I think this is more an interpretation of what a Bay means and it being
an inner of a relation isn't relevant. Islands shouldn't be cut-out of
Bays with a MP relation. It is expected that they are rendered as
transparent rather than blue and mapnik.txt does this.

There was a thread about this at the beginning last year.

There will be multiple layers at the island and device "hover" might
pick up the island name or the invisible bay. On some devices, clicking
on the island will give a list of (the names associated with these
layers.

Ticker

On Mon, 2021-03-15 at 06:09 +0000, Gerd Petermann wrote:
> Hi all,
> 
> so an MP with natural=bay is another candidate that causes trouble
> and - since natural=bay should not be mapped with relations - can be
> ignored.
> In this case it should be enough to change the style.
> 
> Gerd
> 
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> von dfjkman at gmail.com <dfjkman at gmail.com>
> Gesendet: Montag, 15. März 2021 06:54
> An: 'Development list for mkgmap'
> Betreff: Re: [mkgmap-dev] Flooded islands
> 
> Hi Karl,
> 
> I suspect the reason is that Eckerö and other smaller islands are not
> included in the MP Gulf of Bothnia with an inner role, the MP is a
> bay,
> Fasta Åland is included with role inner. This would mean that the bay
> will
> technically over lay the islands, apart from Fasta Åland, they would
> be
> submerged. I presume on the GPS unit the islands are showing because
> the
> order-by-decreasing-area option has been used so the smaller islands
> are
> rendered on top of the bay
> 
> Regards,
> Dave
> 
> -----Original Message-----
> From: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> On Behalf
> Of 7770
> Sent: 14 March 2021 21:28
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: [mkgmap-dev] Flooded islands
> 
> Hi.
> I noted that many of the islands in the Åland archipalago (between
> Sweden
> and
> Finland) are flooded.
> On a GPS unit (gpsmap 66st) the land looks like land, but when
> howering the
> pointer over the area it shows the name of the sea, not the name if
> the
> island.
> 
> In qmapshack the islands look flooded.
> I checked one of the islands (Eckerö, which is westernmost) in JOSM,
> i could
> not find any disconnected section nor any self crossing lines or
> similar
> issues.
> 
> I do use the pre-made sea data when i run mkgmap.
> I also tried running without the pre-made sea data, but it did not
> change
> the flooding of these islands.
> 
> Two screenshots from qmapshack added to the file upload:
> http://files.mkgmap.org.uk/detail/503
> http://files.mkgmap.org.uk/detail/504
> 
> 
> What could be the reason for the flooding?
> 
> regards
> Karl
> 
> 
> 
> 
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