[OSM-talk] Ideas for OSM enhancements

[Andy Allan]

On Dec 28, 2007 8:14 PM, Karl Newman <siliconfiend at gmail.com> wrote:

> Can you enlighten me--what is the tiling problem?

Steve Radcliffe or "Computerteddy" may want to correct me on this,
since they know more than I do.

There's a size limit for the garmin .img format, above which the areas
need to be broken down into smaller tiles. As far as I'm aware, mkgmap
doesn't do this for you. For a while, mkgmap could process the entire
planet within one tile, and then later the UK could still fit within
one tile, but those days are long gone. There was a technique using
non-free software that computerteddy was using to process the data,
but from his(?) wiki page* it seems there's a way around it now.

However, the downloads that we have are generally woefully out of
date, and most of them are from before these size limits starting
biting.
http://wiki.openstreetmap.org/index.php/OSM_Map_On_Garmin/Download

Basically, I can't take planet.osm, run mkgmap and transfer the
resultant .img file(s) to my GPS. This is what we should be aiming
for. What is needed is just a Simple Matter of Programming
(naturally), i.e. some developers and their time focussed on it.

Cheers,
Andy

* http://wiki.openstreetmap.org/index.php/User:Computerteddy