[mkgmap-dev] Mkgmap dropping data

Tue Aug 2 21:24:14 BST 2011

The red areas are the actually rendered areas.

http://imageshack.us/photo/my-images/64/screenshot717201110719p.png/

This is the result by splitting it to 8 pieces. The eastern part is already
OK.

By polygons do you mean multipolygons? I'm sure I broke a lot of
multipolygons by splitting the map into 36, but it seems to be working.

Zsolt
Herrbert74

On Tue, Aug 2, 2011 at 7:52 PM, WanMil <wmgcnfg at web.de> wrote:

> > I had another go with splitter this morning and it worked out. But it's
> > strange.
> > If I split Hungary into 3-4 pieces, the eastern part is usually OK. But
> > even if I split Hungary into 33 pieces I get bad areas on the western
> > part or near Budapest. I splitted it to 36 and it worked with this
> command:
> > java -Xmx1024m -jar splitter.jar --max-nodes=110000
> > c:\osm\osmdata\hungary.osm.pbf
>
> What do you mean exactly with bad areas?
> Maybe you can send an image to show that.
>
> Usually for polygons it is better to select a higher max-nodes and/or
> overlap parameter in the tile splitter because this increases the
> probability that the polygons are contained completely in the tile data.
>
> >
> > But why is it that Eastern Hungary is OK with a million nodes? Is it
> > because it's not so well mapped and it has less relations and/or errors?
> > Can I somehow rejoin the parts to have less areas?
> >
> > It would be useful if mkgmap would send a message which areas it
> > couldn't render and why.
> >
> > Another question:
> > Was I totally wrong using Osmosis to split the data or is there a method
> > which works with routing? To have counties is a bit nicer. I used the
> > following (obviously breaks data):
> > call osmosis.bat --read-pbf c:\osm\osmdata\hungary.osm.pbf
> > --bounding-polygon file=c:\osm\osmdata\county_boundaries\pest.poly
> > completeWays=no completeRelations=no clipIncompleteEntities=true
> > --write-xml c:\osm\osmdata\counties\pest.osm
>
> I cannot say for sure but I would expect that using non rectangular
> tiles is not really supported by mkgmap.
>
> >
> > 2011/8/1 Carlos Dávila <cdavilam at orangecorreo.es
> > <mailto:cdavilam at orangecorreo.es>>
> >
> >       El 01/08/2011 22:36, Zsolt Bertalan escribió:
> >      > Hello
> >      >
> >      > I try to render a Garmin map of Hungary from OSM data with my own
> >      > rules and typ file. At first I used the Tile Splitter, but
> whatever I
> >      > did, I didn't manage to render a good map.
> >     splitter should work fine with Hungary data and you'll get inter-tile
> >     routing working. Can you provide the command you used to split the
> data?
> >      > Then I extracted county borders (Hungary has 19 counties), and
> used
> >      > Osmosis with polygon borders to split the data. I managed it. But
> >      > meanwhile CLC data was imported (I think this might be the
> culprit)
> >      > and I can't do it again. Four counties have only half the data in
> >      > Mapsource. They are not big, so I don't think that the size is the
> >      > problem.
> >      > I use MapSetToolkit with cgpsMapper to upload to MapSource. Here
> >     is an
> >      > example of how I use mkgmap:
> >      > java -Xmx1024M -ea -jar mkgmap.jar --charset=latin2 --route
> >      > --style-file=c:\osm\mkgmap\resources\styles\herrbert
> --family-id=5000
> >      > -c c:\osm\osmdata\counties\template.args --tdbfile
> --description="OSM
> >      > Hungary" 50000.typ
> >     If I remember right, -c option should be the last in you command
> line.
> >      >
> >      > I fI use the route option, cpreview crashes.
> >      >
> >      > I used osmosis with the following options:
> >      > completeWays=no completeRelations=no clipIncompleteEntities=true
> >      > I think this is not optimal for such a map, because I can't route
> >      > between two counties (ways are split without a common node). But
> what
> >      > are the best options?
> >      >
> >      > What am I doing wrong? If you need any more detail I'd be glad to
> >      > provide it.
> >
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> >
> >
> >
> >
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