[Xastir] no zoom levels under 15 with osm maps

[Jerry Dunmire]

I think I should stop referring to it as a 'cache' because I don't
expect it to use any part of the Xastir caching system. Instead, tiles
will be downloaded as required and placed (TBD) in a directory layout
that matches the OSM system so that other OSM tile based systems can
fine and use the tiles. OSM has spend a lot of time planning for tiles
and I think it would be wrong to warp that system.
I expect all of this to be handled in the map_OSM.c file.

I don't know anything about the WMS tiles (or any WMS systems), but
I'll spend a little time looking before I get started. Maybe they have
a tile directory layout similar to OSM (which is similar to Google
maps, and probably others).

Of course, it may be like the Xastir scaling and after I've gotten in
to the code I'll learn that things can't be done as I was expecting.

...jerry

On Mon, Jun 28, 2010 at 5:16 PM, Curt, WE7U <curt.we7u at gmail.com> wrote:
> On Mon, 28 Jun 2010, Jerry Dunmire wrote:
>
>> All good ideas- but first I have to get code working that will map
>> coordinates to tile numbers. There are examples, and I'll use them as
>> starting points. The tiles will be cached with names that match the
>> server structure, so downloading additional tiles could be done a
>> number of ways- both within and external to Xastir.
>
> Note that we either have to match our caching system, which I think
> files by a string name, or modify our cache to do things
> differently.
>
> Also it would be good to write code that is general enough to use
> for other things, like WMS tiles...  WMS could benefit from exactly
> the sorts of things you'll be writing for OSM.  I suspect yet other
> (later) systems could as well.
>
> --
> Curt, WE7U.                         <http://www.eskimo.com/~archer>
>   APRS:  Where it's at!                    <http://www.xastir.org>
>  Lotto:  A tax on people who are bad at math. - unknown
> Windows:  Microsoft's tax on computer illiterates. - WE7U.
> The world DOES revolve around me:  I picked the coordinate system!"
> _______________________________________________
> Xastir mailing list
> Xastir at lists.xastir.org
> http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
>