[mkgmap-dev] Size LimitsFrom Andrew Ayre andy at britishideas.com on Thu Dec 11 03:50:55 GMT 2008
Thanks Steve and Felix - you have sent me down the path to solving my problem. Andy Steve Ratcliffe wrote: > > Hi > >> I understand how to solve this problem (osmosis, osmcut, etc.) but I'm >> wondering what the size limit is and whether it is imposed by the IMG >> file format or mkgmap. Does anyone know? > > The limit is in the IMG format, or at least the version of the format that > we know how to use. It is not the size of the file as a whole but of one > section within it. Files containing routing information for example will be much > bigger in total size. > > The default style is somewhat heavyweight as it contains all residential > roads on two different zoom levels. You would get about twice the amount > with a less heavy style. (You could try --levels='0:23,1:21,2:19' for a > rough idea). > > All garmin maps commercial or otherwise are split into tiles. > In the days before cheap SD cards it would have been a necessary feature > that the map was split into small enough chunks that you could load a few > sections you were interested in onto limited memory. > > ..Steve -- Andy PGP Key ID: 0xDC1B5864
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