[Xastir] no zoom levels under 15 with osm maps

[Jerry Dunmire]

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.

...jerry

On Mon, Jun 28, 2010 at 4:41 PM, Curt, WE7U <curt.we7u at gmail.com> wrote:
> On Mon, 28 Jun 2010, Jerry Dunmire wrote:
>
>> Yes, I have started to look at using the tile servers. I expect much
>> better
>> performance when using cached tiles.
>
> We could also play the same trick as a lot of the web-page mapping
> systems that use tiles:  Pre-download tiles outside the map edges so
> that a pan in any direction will have all the tiles it needs for
> display.  That's one of the ways they achieve the "apparent" speed:
> They download tiles in the background after you receive the initial
> map.
>
> One could extend that technique to snag tiles at the next zoom level
> up/down as well.
>
> --
> Curt, WE7U.                         <http://www.eskimo.com/~archer>
>   APRS:  Where it's at!                    <http://www.xastir.org>
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