[mkgmap-dev] splitter r325: improved split algo and new option

Wed May 7 14:20:51 BST 2014

Well, I just ran splitter on the .osm.pbf file for Asia and austria.
True the split is a bit faster to o5m - but the difference is not so big.

Compiling from osm.pbf or o5m however - was more or less the same speed...
on the other hand the o5m splitted files use much more space than 
osm.pbf (for Austria 293MB vs 450MB - that's about 50% more).

I will do some further test with input o5m and output osm.pbf vs output 
o5m. However if there is also no significant time difference (right now 
it's like maybe 10% faster output to o5m instead of osm.pbf) - then I 
think I'm gonna stay splitter output at osm.pbf - simply because on my 
server I'm a bit harddisk bound (got a large network drive for saving 
stuff, but with about 20MB/s vs 150MB/s for the local drive, it's really 
only useful to save stuff there - not for working with anything on the 
network drive). Splitter input according to the above time measures 
however - really seems to profit from o5m...
On 07.05.2014 12:56, Felix Hartmann wrote:
>  okay, well the numbers are convincing. I will change to o5m and 
> osmupdate too - as soon as I find the time (I do think I need 5-10 
> hours changing my scripts and making sure everything is neatly cut, 
> but right now I'm too timelimited to do so)..
> On 07.05.2014 12:15, Bernd Weigelt wrote:
>> Am Mittwoch, 7. Mai 2014, 11:37:58 schrieb Felix Hartmann:
>>> Well I still use pbf and not o5m.
>>> First pbf is smaller..
>>> Second - Geofabrik only offers pbf - that's why I stayed with it.
>>>
>>> I don't think I can cut a lot of time by first converting to 05m, then
>>> hand it over to splitter...
>>> Actually I also let splitter output pbf... Maybe I could change that in
>>> future to 05m..
>> I download a planet.pbf, convert it to o5m, time ~50 mins,and cut the 
>> needed
>> polies from that planet.o5m. an update of my germany.o5m, 3,2 GB. 
>> takes now 3
>> minutes. I update the planet once a month, my extracts everytime i 
>> need them.
>>
>> thats much faster then download a new pbf everyday or update this pbf.
>> and with the local planet it is easier to create special maps for 
>> friends like
>> bonn+100 or dach+
>>
>> Bernd
>>
>>
>

-- 
keep on biking and discovering new trails

Felix
openmtbmap.org & www.velomap.org