<div dir="ltr"><div>Hi Gerd, Karl,</div><div><br></div><div>Thanks for your interesting information.</div><div><br></div><div>@Gerd,<br></div><div>I've tried to generate a map with a resolution of 23. During the processing, I've received a lot of messages like "SEVERE (TypeReader): 63430028.osm.pbf: Type 0x07 min-res:24 will not be written with level 0 at resolution 23 in style file lines, line 215 -> routing may not work". </div><div>This was due to some rules in the "lines" file of the default style. I modified them from "resolution 24" to "resolution 23" as my goal was to keep all ways and to obtain a routable map. The issue was solved.</div><div>Looking at the result, I can see that details
(useless for me like buildings, POI, ...)
have disappeared and the map size is now 142MB instead of 242MB for Belgium. Excellent !!</div><div>The strange thing is that the result seems less accurate. It looks like some nodes have been removed. For example, a roundabout is drawn as a triangle. Is it possible?</div><div><br></div><div><br></div><div>@Karl,<br></div><div>Here is a description of the TopoActive map (West part):</div><div>TopoActive Europe 2020.20 South West 2.92 GB (3,139,764,224 bytes)<br>Andorra, Belgium, France, Iceland, Ireland, Italy, Liechtenstein, Luxembourg, Malta, Monaco, Netherlands, Portugal, San Marino, Spain, Switzerland, United Kingdom, Vatican City, Albania, Bosnia and Herzegovina, Croatia, Greece, Kosovo , Macedonia, Montenegro, Serbia, Slovenia<br></div><div>If I take all these countries in Geofabrik, the total size is 10,4GB. So the ratio is 3.56. From my example of Belgium above, the ratio was 2.8 but I need to examine what can still be removed to gain some more space.</div><div>Anyway, I'm interested in your 'optimized' style.</div><div><br></div><div>Thanks again,</div><div>Pierre</div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Dec 27, 2020 at 9:00 PM 7770 <<a href="mailto:7770@foskan.eu" 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>
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.<br>
Using 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 feels <br>
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 me <br>
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>
> 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" target="_blank">mkgmap-dev-bounces@lists.mkgmap.org.uk</a>> im Auftrag von<br>
> Pierre Brico <<a href="mailto:pierre.brico@gmail.com" 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>
> 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><br>
<br>
<br>
<br>
<br>
_______________________________________________<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></div>