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=*] 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.
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
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