<div dir="ltr">Eastern and Northern Europe are pretty big... I would say for a map that is all of Europe - or at least full EU plus UK - covering all roads and highway=track without NT format it will not work. And you would like at least some polygons too - lakes, forest, urban area. And big rivers and some more things. Going to resolution 23,21,19,17 vs 24,22,20,17 is definitely worth it if its about the 4GB limit IMHO. also 23 resolution maps will be faster than 24 resolution maps on the device. But more important is of course that you reduce detail when it comes to map speed.<div><br></div><div>If it's about car navigation, I feel 23 is alright. When it comes to foot/bicycle and so on - 24 is a must IMHO. However - who is still using garmin devices for car navigation? then especially with OSM which in my eyes misses too much for car navigation while it's advantages don't play out at all when it comes to maps reduced for car routing. Hard nowadays to compete with google maps.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 4 Jan 2021 at 04:47, DD8KQ <<a href="mailto:dd8kq@gmx.de">dd8kq@gmx.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>I do not think that Europe Map within 4 GB is out of question.
I've managed to build a map with lets say Central Europe, which is
in the range of about 3.3 Gb. See attached jpg for size and detail
of the map.</p>
<p>Hopefully the attachments will go into the list.</p>
<p>Regards<br>
</p>
<div>Am 03.01.2021 um 18:35 schrieb Felix
Hartmann:<br>
</div>
<blockquote type="cite">
<div dir="auto">Garmin city navigator maps use 23. Else a Europe
map within 4GB is out of question. However they use NT format
too, which is about 1/3 smaller additionally.
<div dir="auto"><br>
</div>
<div dir="auto">Same I guess for their Topo Europe maps.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, 4 Jan 2021, 01:03
Pierre Brico <<a href="mailto:pierre.brico@gmail.com" target="_blank">pierre.brico@gmail.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div>Hi Karl,</div>
<div><br>
</div>
<div>Thanks for your analysis, very instructive. I've tried
several of your steps and arrived at the conclusion that
it's not a good idea to set the resolution to 23. Here are
the 2 main reasons:</div>
<div>1. as you mentioned the map becomes less accurate, some
roundabouts are converted into triangles, some line
segments are misaligned ...</div>
<div>2. from the cgpsmapper guide: "IMG file should be
created with Level 0 equal to 24 – otherwise distance
calculation might be wrong"</div>
<div><br>
</div>
<div>Do you know if the Garmin TopoActive map uses
resolution 23 or 24 ?</div>
<div><br>
</div>
<div>Pierre</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Jan 3, 2021 at
8:21 AM 7770 <<a href="mailto:7770@foskan.eu" rel="noreferrer" target="_blank">7770@foskan.eu</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi.<br>
I made a few tests to lower the size of the maps.<br>
<br>
Comparison is made to my standard map which is based on
the styles example in <br>
mkgmap but extended a bit for my purposes. This has 100
% size.<br>
There are 4 levels, 24 is the most detailed resolution.<br>
<br>
Setting the resolution to 23 and changing relevant
polygons, lines, points to <br>
show at 23 instead of 24. 4 levels (option file).<br>
Size 78 %.<br>
<br>
Setting the resolution to 23 and changing relevant
polygons, lines, points to <br>
show at 23 instead of 24. 3 levels (option file). levels
= 0:23, 1:20, 2:18<br>
Size 64 %.<br>
<br>
<br>
Using my minimal style (discussed earlier in this
thread).<br>
Compared to normal map, it is about 75 % in size.<br>
<br>
Using minimal style and <br>
Setting the resolution to 23 and changing relevant
polygons, lines, points to <br>
show at 23 instead of 24. 4 levels (option file).<br>
Size 63 %.<br>
<br>
Using minimal style and <br>
Setting the resolution to 23 and changing relevant
polygons, lines, points to <br>
show at 23 instead of 24. 3 levels (option file). levels
= 0:23, 1:20, 2:18<br>
Size 51 %.<br>
<br>
<br>
I noted that when resolution is set to 23 polygons
smaller than the mentioned <br>
raster at ~4.8 m disappear. They also do get distorted.
Buildings are such <br>
polygons that are effected a lot, and it is (in my
opinion) a good idea to <br>
disable buildings and similar polygons entirely when
lowering the resolution.<br>
Coast lines and alike become less detailed of course.<br>
Some line segments have become a bit misaligned (i noted
bus stop platforms <br>
and similar short lines can have this issue).<br>
<br>
<br>
I yet have to check how well these maps work on a unit
but it seems possible <br>
to lower the size quite a lot if it is desired.<br>
<br>
<br>
Regards<br>
Karl<br>
<br>
<br>
<br>
<br>
On onsdag 30 december 2020 kl. 13:27:06 CET Vuki wrote:<br>
> Hi,<br>
> <br>
> am also working on a "lite" style and there may be
some nice idea in yours<br>
> to use :) will check that out, thanks!<br>
> <br>
> <br>
> Köszi:<br>
> Vuki<br>
> On 2020.12.30. 12:08, 7770 wrote:<br>
> <br>
> Hi.<br>
> I am ok with sharing the style, but i was not able
to do it until today<br>
> (planned today or tomorrow).<br>
> 5 files attached, 4 related to style, 1 to TYP
(foskan.txt).<br>
> Only those 4 style files have changes, compared to
the standard.<br>
> <br>
> The complete set of files is
./mkgmap-rNNNN/examples/styles/default/<br>
> <br>
> <br>
> There is nothing fancy nor complex, nor have i
played around with the levels<br>
> yet.<br>
> <br>
> For reference i also added my TYP-file, which may
help in case you find some<br>
> type codes which are non standard (there might be a
few). The type file is<br>
> shared and does contain a few things that are not
used by the minimal style<br>
> (don't get confused).<br>
> <br>
> <br>
> Summery of the style, which is based on the default
mkgmap example.<br>
> All changes comments are marked with ## to be able
to tell them apart from<br>
> regular comments given after #.<br>
> <br>
> polygons and points do have a lot of disabled
information.<br>
> Buildings, shops, and most of the parking types are
disables.<br>
> <br>
> lines doesn't have as many changes and probably a
few more small waterways<br>
> (streams, rapids, waterfalls) can be disabled to
remove yet a bit of data.<br>
> <br>
> note for polygons.<br>
> Waters and forests are still visible, since it adds
information to the map,<br>
> but if natural objects are not important for you,
there is more space to<br>
> save.<br>
> <br>
> i have made one change in lines file to display the
road name on tertiary<br>
> roads instead of the reference. this does make
sense in nordic countries,<br>
> where tertiary roads are usually only referred to
with the name.<br>
> <br>
> Ski lifts (arealways in general) are set in similar
way as railroads.<br>
> <br>
> One last thing to mention is that i have updated
the inc/address file.<br>
> Close to the end there is a section in which the
mkgmap:phone is updated to<br>
> show information about which fuels are sold at fuel
stations. This is not<br>
> fully complete for all fuel types but the ones i
somehow considered<br>
> important. Depending on where one is, a few more
fuel types can easily be<br>
> added.<br>
> <br>
> A note.<br>
> The mkgmap:phone seems to be 50 characters maximum,
longer data will be<br>
> truncated and not shown on the device it seems.<br>
> <br>
> <br>
> Regards and happy new year!<br>
> Karl<br>
> <br>
> On onsdag 30 december 2020 kl. 10:16:51 CET Vuki
wrote:<br>
> <br>
> Hi Karl,<br>
> <br>
> don't you want to share your minimal style? :)<br>
> <br>
> <br>
> Köszi:<br>
> Vuki<br>
> On 2020.12.27. 20:59, 7770 wrote:<br>
> <br>
> Hi.<br>
> A few observations about the TopoActive europe map.
(i have it on a GPSMAP<br>
> 66st).<br>
> <br>
> The map is rendered slower than most custom made
maps.<br>
> Updates occur 2 times per year, but even at those
times many changes to OSM<br>
> are not present. Perhaps they only update some
parts yearly.<br>
> Points lack all kind of additional information
which other mappers add<br>
> (opening hours, region, phone numbers, etc.).<br>
> One nice thing is colour marked national parks and
reserves.<br>
> Being an outdoor map, it lacks some information
about shelters in the<br>
> wilderness.<br>
> Routing is possible only for outdoor activities
(cycle, walk, hike, direct),<br>
> automotive routing (car, motorcycle) is disabled.<br>
> <br>
> I have tried creating a minimal style. This lowers
the data to about 75 % or<br>
> my normal set up. But i did not change the level,
which i will try :-)<br>
> Currently I am no way near the compression which
TopoActive achieves. Using<br>
> input data which is about 6,7 GB in pbf format,
creates a gmapsupp just<br>
> below 4 GB for normal and around 3 GB for minimal
style. These numbers<br>
> feels similar to getting France into 1.9 GB from
3.7 GB pbf (geofabrik).<br>
> <br>
> <br>
> The minimal set up is not very fancy at all, it
disables things not wanted.<br>
> Buildings, shops, most of parkings, and a bit more.<br>
> <br>
> Today i cannot send off any style, but in case that
would be of interest let<br>
> me know and i can share it in a few days (guessing
Wednesday or Thursday).<br>
> <br>
> <br>
> Regards<br>
> Karl<br>
> <br>
> On söndag 27 december 2020 kl. 20:08:10 CET Gerd
Petermann wrote:<br>
> <br>
> Hi Pierre,<br>
> <br>
> my first guess would be that the level 0 is at
resolution 23 instead of 24.<br>
> <br>
> Gerd<br>
> <br>
> ________________________________________<br>
> Von: mkgmap-dev <<a href="mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk" rel="noreferrer" target="_blank">mkgmap-dev-bounces@lists.mkgmap.org.uk</a>>
im Auftrag von<br>
> Pierre Brico <<a href="mailto:pierre.brico@gmail.com" rel="noreferrer" target="_blank">pierre.brico@gmail.com</a>>
Gesendet: Sonntag, 27. Dezember 2020<br>
> 19:37<br>
> An: Development list for mkgmap<br>
> Betreff: [mkgmap-dev] Garmin Topo Europe map<br>
> <br>
> <br>
> Hello guys,<br>
> <br>
> I've just discovered the Garmin TopoActive Europe
map based on OpenStreetMap<br>
> data. This map is sold at a price of 50€ or is
pre-installed on some new<br>
> devices. I've just seen it on the device of one of
my friends and it looks<br>
> very good. I'm surprised to see that for West
Europe, it takes only 2.8GB<br>
> and is quite complete (index for search, routable,
...).<br>
> <br>
> For now, I generate my own maps based on your
excellent tool but the result<br>
> is much bigger (1.9GB only for France with probably
more details). So, my<br>
> question is: does anybody have a similar
configuration (style files and<br>
> command line) to obtain a result like the Garmin
TopoActive Europe ?<br>
> <br>
> Thanks,<br>
> Pierre<br>
> _______________________________________________<br>
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<pre cols="72"> Mit freundlichen Grüßen
#####################################################
Manfred Haiduk,
Zum Fischbach 9,
52393 Hürtgenwald
e-mail <a href="mailto:mhaiduk@t-online.de" target="_blank">mhaiduk@t-online.de</a>
#####################################################</pre>
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_______________________________________________<br>
mkgmap-dev mailing list<br>
<a href="mailto:mkgmap-dev@lists.mkgmap.org.uk" target="_blank">mkgmap-dev@lists.mkgmap.org.uk</a><br>
<a href="http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev" rel="noreferrer" target="_blank">http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev</a></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Felix Hartman - Openmtbmap.org & VeloMap.org<br></div><br></div></div></div></div></div></div>