[mkgmap-dev] Garmin Topo Europe map

Mon Jan 11 10:43:50 GMT 2021

Hi.
just in case anyone is interested, i noticed that the Garmin Topo Europe map 
maps place=isolated_dwelling, whereas the example styles in mkgmap does not.
I haven't noticed similar situation for place=farm, place=locality. But they 
may be handled in the same way.

Something like this can be added into the points style file to have the data in 
the map.

# resolution 24 or 23
place=isolated_dwelling          & name=* [0x0b00 resolution 24] 

Regards
Karl

On måndag 4 januari 2021 kl. 07:01:18 CET Felix Hartmann wrote:
> 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.
> 
> 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.
> 
> On Mon, 4 Jan 2021 at 04:47, DD8KQ <dd8kq at gmx.de> wrote:
> > 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.
> > 
> > Hopefully the attachments will go into the list.
> > 
> > Regards
> > Am 03.01.2021 um 18:35 schrieb Felix Hartmann:
> > 
> > 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.
> > 
> > Same I guess for their Topo Europe maps.
> > 
> > On Mon, 4 Jan 2021, 01:03 Pierre Brico <pierre.brico at gmail.com> wrote:
> >> Hi Karl,
> >> 
> >> 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:
> >> 1. as you mentioned the map becomes less accurate, some roundabouts are
> >> converted into triangles, some line segments are misaligned ...
> >> 2. from the cgpsmapper guide: "IMG file should be created with Level 0
> >> equal to 24 – otherwise distance calculation might be wrong"
> >> 
> >> Do you know if the Garmin TopoActive map uses resolution 23 or 24 ?
> >> 
> >> Pierre
> >> 
> >> On Sun, Jan 3, 2021 at 8:21 AM 7770 <7770 at foskan.eu> wrote:
> >>> Hi.
> >>> I made a few tests to lower the size of the maps.
> >>> 
> >>> Comparison is made to my standard map which is based on the styles
> >>> example in
> >>> mkgmap but extended a bit for my purposes. This has 100 % size.
> >>> There are 4 levels, 24 is the most detailed resolution.
> >>> 
> >>> Setting the resolution to 23 and changing relevant polygons, lines,
> >>> points to
> >>> show at 23 instead of 24. 4 levels (option file).
> >>> Size 78 %.
> >>> 
> >>> Setting the resolution to 23 and changing relevant polygons, lines,
> >>> points to
> >>> show at 23 instead of 24. 3 levels (option file). levels = 0:23, 1:20,
> >>> 2:18
> >>> Size 64 %.
> >>> 
> >>> 
> >>> Using my minimal style (discussed earlier in this thread).
> >>> Compared to normal map, it is about 75 % in size.
> >>> 
> >>> Using minimal style and
> >>> Setting the resolution to 23 and changing relevant polygons, lines,
> >>> points to
> >>> show at 23 instead of 24. 4 levels (option file).
> >>> Size 63 %.
> >>> 
> >>> Using minimal style and
> >>> Setting the resolution to 23 and changing relevant polygons, lines,
> >>> points to
> >>> show at 23 instead of 24. 3 levels (option file). levels = 0:23, 1:20,
> >>> 2:18
> >>> Size 51 %.
> >>> 
> >>> 
> >>> I noted that when resolution is set to 23 polygons smaller than the
> >>> mentioned
> >>> raster at ~4.8 m disappear. They also do get distorted. Buildings are
> >>> such
> >>> polygons that are effected a lot, and it is (in my opinion) a good idea
> >>> to
> >>> disable buildings and similar polygons entirely when lowering the
> >>> resolution.
> >>> Coast lines and alike become less detailed of course.
> >>> Some line segments have become a bit misaligned (i noted bus stop
> >>> platforms
> >>> and similar short lines can have this issue).
> >>> 
> >>> 
> >>> I yet have to check how well these maps work on a unit but it seems
> >>> possible
> >>> to lower the size quite a lot if it is desired.
> >>> 
> >>> 
> >>> Regards
> >>> Karl
> >>> 
> >>> On onsdag 30 december 2020 kl. 13:27:06 CET Vuki wrote:
> >>> > Hi,
> >>> > 
> >>> > am also working on a "lite" style and there may be some nice idea in
> >>> 
> >>> yours
> >>> 
> >>> > to use :) will check that out, thanks!
> >>> > 
> >>> > 
> >>> > Köszi:
> >>> > Vuki
> >>> > On 2020.12.30. 12:08, 7770 wrote:
> >>> > 
> >>> > Hi.
> >>> > I am ok with sharing the style, but i was not able to do it until
> >>> > today
> >>> > (planned today or tomorrow).
> >>> > 5 files attached, 4 related to style, 1 to TYP (foskan.txt).
> >>> > Only those 4 style files have changes, compared to the standard.
> >>> > 
> >>> > The complete set of files is ./mkgmap-rNNNN/examples/styles/default/
> >>> > 
> >>> > 
> >>> > There is nothing fancy nor complex, nor have i played around with the
> >>> 
> >>> levels
> >>> 
> >>> > yet.
> >>> > 
> >>> > For reference i also added my TYP-file, which may help in case you
> >>> 
> >>> find some
> >>> 
> >>> > type codes which are non standard (there might be a few). The type
> >>> 
> >>> file is
> >>> 
> >>> > shared and does contain a few things that are not used by the minimal
> >>> 
> >>> style
> >>> 
> >>> > (don't get confused).
> >>> > 
> >>> > 
> >>> > Summery of the style, which is based on the default mkgmap example.
> >>> > All changes comments are marked with ## to be able to tell them apart
> >>> 
> >>> from
> >>> 
> >>> > regular comments given after #.
> >>> > 
> >>> > polygons and points do have a lot of disabled information.
> >>> > Buildings, shops, and most of the parking types are disables.
> >>> > 
> >>> > lines doesn't have as many changes and probably a few more small
> >>> 
> >>> waterways
> >>> 
> >>> > (streams, rapids, waterfalls) can be disabled to remove yet a bit of
> >>> 
> >>> data.
> >>> 
> >>> > note for polygons.
> >>> > Waters and forests are still visible, since it adds information to the
> >>> 
> >>> map,
> >>> 
> >>> > but if natural objects are not important for you, there is more space
> >>> 
> >>> to
> >>> 
> >>> > save.
> >>> > 
> >>> > i have made one change in lines file to display the road name on
> >>> 
> >>> tertiary
> >>> 
> >>> > roads instead of the reference. this does make sense in nordic
> >>> 
> >>> countries,
> >>> 
> >>> > where tertiary roads are usually only referred to with the name.
> >>> > 
> >>> > Ski lifts (arealways in general) are set in similar way as railroads.
> >>> > 
> >>> > One last thing to mention is that i have updated the inc/address file.
> >>> > Close to the end there is a section in which the mkgmap:phone is
> >>> 
> >>> updated to
> >>> 
> >>> > show information about which fuels are sold at fuel stations. This is
> >>> 
> >>> not
> >>> 
> >>> > fully complete for all fuel types but the ones i somehow considered
> >>> > important. Depending on where one is, a few more fuel types can easily
> >>> 
> >>> be
> >>> 
> >>> > added.
> >>> > 
> >>> > A note.
> >>> > The mkgmap:phone seems to be 50 characters maximum, longer data will
> >>> > be
> >>> > truncated and not shown on the device it seems.
> >>> > 
> >>> > 
> >>> > Regards and happy new year!
> >>> > Karl
> >>> > 
> >>> > On onsdag 30 december 2020 kl. 10:16:51 CET Vuki wrote:
> >>> > 
> >>> > Hi Karl,
> >>> > 
> >>> > don't you want to share your minimal style? :)
> >>> > 
> >>> > 
> >>> > Köszi:
> >>> > Vuki
> >>> > On 2020.12.27. 20:59, 7770 wrote:
> >>> > 
> >>> > Hi.
> >>> > A few observations about the TopoActive europe map. (i have it on a
> >>> 
> >>> GPSMAP
> >>> 
> >>> > 66st).
> >>> > 
> >>> > The map is rendered slower than most custom made maps.
> >>> > Updates occur 2 times per year, but even at those times many changes
> >>> 
> >>> to OSM
> >>> 
> >>> > are not present. Perhaps they only update some parts yearly.
> >>> > Points lack all kind of additional information which other mappers add
> >>> > (opening hours, region, phone numbers, etc.).
> >>> > One nice thing is colour marked national parks and reserves.
> >>> > Being an outdoor map, it lacks some information about shelters in the
> >>> > wilderness.
> >>> > Routing is possible only for outdoor activities (cycle, walk, hike,
> >>> 
> >>> direct),
> >>> 
> >>> > automotive routing (car, motorcycle) is disabled.
> >>> > 
> >>> > I have tried creating a minimal style. This lowers the data to about
> >>> 
> >>> 75 % or
> >>> 
> >>> > my normal set up. But i did not change the level, which i will try :-)
> >>> > Currently I am no way near the compression which TopoActive achieves.
> >>> 
> >>> Using
> >>> 
> >>> > input data which is about 6,7 GB in pbf format, creates a gmapsupp
> >>> > just
> >>> > below 4 GB for normal and around 3 GB for minimal style. These numbers
> >>> > feels similar to getting France into 1.9 GB from 3.7 GB pbf
> >>> 
> >>> (geofabrik).
> >>> 
> >>> > The minimal set up is not very fancy at all, it disables things not
> >>> 
> >>> wanted.
> >>> 
> >>> > Buildings, shops, most of parkings, and a bit more.
> >>> > 
> >>> > Today i cannot send off any style, but in case that would be of
> >>> 
> >>> interest let
> >>> 
> >>> > me know and i can share it in a few days (guessing Wednesday or
> >>> 
> >>> Thursday).
> >>> 
> >>> > Regards
> >>> > Karl
> >>> > 
> >>> > On söndag 27 december 2020 kl. 20:08:10 CET Gerd Petermann wrote:
> >>> > 
> >>> > Hi Pierre,
> >>> > 
> >>> > my first guess would be that the level 0 is at resolution 23 instead
> >>> 
> >>> of 24.
> >>> 
> >>> > Gerd
> >>> > 
> >>> > ________________________________________
> >>> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> >>> 
> >>> von
> >>> 
> >>> > Pierre Brico <pierre.brico at gmail.com> Gesendet: Sonntag, 27. Dezember
> >>> 
> >>> 2020
> >>> 
> >>> > 19:37
> >>> > An: Development list for mkgmap
> >>> > Betreff: [mkgmap-dev] Garmin Topo Europe map
> >>> > 
> >>> > 
> >>> > Hello guys,
> >>> > 
> >>> > I've just discovered the Garmin TopoActive Europe map based on
> >>> 
> >>> OpenStreetMap
> >>> 
> >>> > data. This map is sold at a price of 50€ or is pre-installed on some
> >>> 
> >>> new
> >>> 
> >>> > devices. I've just seen it on the device of one of my friends and it
> >>> 
> >>> looks
> >>> 
> >>> > very good. I'm surprised to see that for West Europe, it takes only
> >>> 
> >>> 2.8GB
> >>> 
> >>> > and is quite complete (index for search, routable, ...).
> >>> > 
> >>> > For now, I generate my own maps based on your excellent tool but the
> >>> 
> >>> result
> >>> 
> >>> > is much bigger (1.9GB only for France with probably more details). So,
> >>> 
> >>> my
> >>> 
> >>> > question is: does anybody have a similar configuration (style files
> >>> > and
> >>> > command line) to obtain a result like the Garmin TopoActive Europe ?
> >>> > 
> >>> > Thanks,
> >>> > Pierre
> >>> > _______________________________________________
> >>> > mkgmap-dev mailing list
> >>> > mkgmap-dev at lists.mkgmap.org.uk
> >>> > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >>> > 
> >>> > 
> >>> > 
> >>> > 
> >>> > _______________________________________________
> >>> > mkgmap-dev mailing list
> >>> > mkgmap-dev at lists.mkgmap.org.uk
> >>> > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >>> 
> >>> _______________________________________________
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> >>> mkgmap-dev at lists.mkgmap.org.uk
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> >> 
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> > 
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> > 
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