[OSM-newbies] download a lot of datas

[Andy Robinson]

On 27/11/2007, Francois De Ryckel <francois.deryckel at isdbd.org> wrote:
> Hi,
>
> Any idea on how to do to get a lot of OSM data into one file?  The reason
> behind this request is that I would like to get a big osm file
> (Bangladesh) to convert it with mkgmap to my gps as an .img file.  Do I
> make sense?
> I can't do it anymore as the area is too big now (not a lot bigger but big
> enough to be refused by JOSM to download all in once!)
>
> Cheers and thanks for your advices!
>
>
>
> François de Ryckel
>

If the area you need is not too large then you can quite quickly still
do it with JOSM. The API only permits a maximum 0.25 deg x 0.25 deg
data box so split up your bounding box into 0.25 deg maximum parts and
import them into JOSM. Import each to a new layer is quickest and then
use the merge down to merge them all into the same layer.
Alternatively import them into the same layer. Once you are done you
can same the final .osm file and then create your img file using
mkgmap.

JOSM is fine for this process, even for multiple 0.25 deg "tiles" of
data, but only so long as each area doesn't have a huge amount of data
in it. If there is lots of data then the merge process in JOSM will
take some time. If this is the case then moving to a planet extract
using osmosis is the logical way to go. For Bangladesh I would suggest
you try the JOSM approach first though.

Cheers

Andy


-- 
Andy Robinson