[mkgmap-dev] creating precompiled boundaries with Derby DB?From GerdP gpetermann_muenchen at hotmail.com on Mon Feb 20 19:55:35 GMT 2012
Hi WanMil, okay, accepted. When I wrote this I got the impression that it could be done with < 100 lines of code, but I did not think about the complex call path of BoundaryElementSaver which makes it quite complicated to find a good place for the creation of the sql connection. Gerd WanMil wrote > > Hi Gerd, > > I don't veto against that but I don't see the big reason for that. > Preparing boundaries must not be performed by anyone because they are > downloadable on some sites. If you really like to create your own > boundaries you can split the planet file into smaller pieces and merge > them afterwards. > So in the end you have quite a lot of development work but not a big > improvement. I think there are more important things to be reworked. > > But that's just my singular opinion. > > WanMil > >> Hi, >> >> would it be okay to change the BoundaryPreparer so that it (optionally) >> stores data in a Derby DB instead of keeping everything on the heap? >> http:////http://www.oracle.com/technetwork/java/javadb/overview/index.html >> Java DB >> >> Due to the growth of the OSM data I can no longer create europe *.bnd >> files >> with -Xmx2800m (which seems to be the max. value on my machine) >> I think the current process of extracting boundary data with osmconvert >> and >> osmfilter is already quite complex, and maybe a simple DB will help. >> The idea: The BoundaryElementSaver could store the data in a DB(maybe >> only >> the coord data). >> This would allow to create the *.bnd files with less than 1GB of memory. >> >> Any objections against this? >> >> Gerd >> >> >> >> -- >> View this message in context: >> http://gis.19327.n5.nabble.com/creating-precompiled-boundaries-with-Derby-DB-tp5498179p5498179.html >> Sent from the Mkgmap Development mailing list archive at Nabble.com. >> _______________________________________________ >> mkgmap-dev mailing list >> mkgmap-dev at .org >> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev >> > > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev at .org > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev > -- View this message in context: http://gis.19327.n5.nabble.com/creating-precompiled-boundaries-with-Derby-DB-tp5498179p5500109.html Sent from the Mkgmap Development mailing list archive at Nabble.com.
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