[Xastir] Open Street Map support (read this)

[Tom Hayward]

On Wed, Jun 9, 2010 at 13:34, Curt, WE7U <curt.we7u at gmail.com> wrote:
> I saw that once and then ran out of time trying to duplicate it
> (couldn't at that time).  The new code tweaks Xastir's zoom levels
> to match the map instead of the other way around, so that's likely
> most of the issues we're seeing.  Hopefully that will be tweaked and
> we'll have precise georeferencing then, better than Tigermaps could
> deliver (due to their weird projection).

I can reproduce it by loading a Map Bookmark set to level 512. The
APRS layer is zoomed to 512, but the OSM layer is not.

> Rendered by a server, similar to how Tigermaps were done.

Ok, this makes sense as to why the standard xastir map caching is
used. I assumed [incorrectly] that it was loading tiles, for which the
normal xastir caching wouldn't be well suited. The server-render
explains the latency. I've installed map caching now and it's much
faster where it can take advantage of the cache.

Tom KD7LXL