On Wed, Feb 11, 2009 at 12:42 PM, Shaun McDonald <[email protected]>wrote:
> > On 11 Feb 2009, at 12:14, 80n wrote: > > On Wed, Feb 11, 2009 at 11:39 AM, Patrik Sjöberg <[email protected]>wrote: > >> Hi! >> >> What would be the best way to get data for ways at a specific zoom >> level? I would like all roads visible on zoom 5 for instance, possibly > > > There is currently no predefined method for this. Each style will have a > different set of things at each zoom level, so you will need to manually > work out what you want. > > >> with lower resolution (fewer nodes per way). I'm guessing something >> like >> http://www.informationfreeway.org/api/0.5/way[highway=*]<http://www.informationfreeway.org/api/0.5/way%5Bhighway=*%5D>but >> the >> API's only seem suitable for quite small boxes. > > > You will also need to do the reduction in resolution yourself. > > >> > The extended API might be what you are looking for: > http://wiki.openstreetmap.org/wiki/XAPI > > > This will be useful for you if you are looking for small amounts of data. > You don't say what you are trying to do with the data. > This will be useful for large amounts of data as well. XAPI permits queries that for bboxes that are 400 times larger than the main api. > > > > >> >> We're also trying to import the planet file to our own copy of the >> database with osmosis. We have some quite new 8-core Mac Pro's here >> for development but osmosis 0.30 is compiled with java version that >> does not seem to be available on osx yet so we are trying on some old >> server instead. Would osmosis benefit enough from multicores that it >> would be strongly recommended to dedicate a Mac Pro (by booting in >> windows) for the parsing? Do you have any feeling of how long the >> import will take? We experimented with some simple ruby and sqlite and >> calculated the time required to like 3 months ^^ > > > > You can't easily compile osmosis on Mac OS X, however you can run osmosis > on Mac OS X without problems if you set the Java Preferences to use Java 6 > instead of Java 5. (I'm assuming that you have the latest version of Mac OS > X 10.5 installed, and you have all the updates.) > > If you do decide to dual boot, I would dual boot to Ubuntu instead of > windows. > > As per some previous discussion, it is recommended to not use sqlite for > huge amounts of data. Sqlite will only cope with a small town or village. > Try using postgres, or MySQL instead. > > Shaun > > > _______________________________________________ > dev mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/dev > >
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