[mkgmap-dev] Mkgmap dropping data

Tue Aug 2 18:52:08 BST 2011

> 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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