[Xastir] Online Map Enhancements

[Lee Bengston]

On Fri, Nov 23, 2018 at 4:26 PM Lee Bengston <lee.bengston at gmail.com> wrote:

> After 11 years of avoiding attempting to modify Xastir's source code I
> took the plunge.
>
> Knowing there were alternative OSM-like tile sets available such as those
> listed here, http://aprsisce.wikidot.com/tile-sets, I thought I would see
> if I could get Xastir to  retrieve tiles from servers that reverse the x
> and y parameter when storing the otherwise standard 256x256 tiles.  After
> much teeth gnashing and attempts to fry my brain, which is mostly due to
> zero experience programming in C, I got things working.
>
> Next it was time to try some different URL's, and to my surprise and
> dismay I found the nationalmap.gov sever didn't put an extension on the
> tiles, which are jpg files.  So it was back to the source to deal with that
> scenario, and I was able to get that working as well.
>
> I looked at the Wiki article on how developers should use Git, but I guess
> my brain is to tired for that to fully soak in, so for now I'm sharing the
> modified source files via a web link.
>

By the way I didn't mean to imply above that I now consider myself to be a
developer :-)

>
> http://www.175moonlight.com/xastir/new-Xastir-src.tar.gz
>
> Also here are two sample geo files that use the new capabilities:
>
> http://www.175moonlight.com/xastir/sample-geo-files.tar.gz
>
> At this point I'm not recommending that new geo files for a bunch of
> alternate tile sets should be included with Xastir's source code.  I don't
> have a good handle on what the terms of use are for the ones on the
> aprsisce site above.  I'm thinking the nationalmap.gov geo for the USGS
> Topo Map, which is one of the samples provided is probably OK.  The URL for
> that one is not on the aforementioned aprsisce site - perhaps because it's
> one that doesn't use file extensions in the tile names.
>
> I'm sure there are more efficient ways to code what I did, but I'll still
> take the moral victory that it works.  :-)
>

Update - I changed the code so that map_OSM.c does not get so bloated.  The
same download above will retrieve the most up to date source files.  The
new geo files are still working after the changes.

>
> Lee - K5DAT
>
>
>