[Xastir] using aprsworld maps

[James Jefferson]

> 2) Has anyone used aprsworld maps with xastir?  I would believe that
> something has been attempted.  I went to:
> http://maps.aprsworld.net/docs/xastir.php and there is some information
> there but I am not sure how it applies.  There is also a map file at
> http://maps.aprsworld.net/mapserver/xastir.map but if I copy it down it
> gives me a whole string of errors.

I'll try to answer the aprsworld.net question. 

I've made some attempts at adding support to xastir for the maps that 
maps.aprsworld.net generates. At this point xastir does not yet support them, 
and the problem is with aprsworld not xastir. 

The technical answer: The problem is that the mapserver maps.aprsworld.net 
uses does not use the exact extent specified. In other words, if you request 
an image that would appear to be distorted, mapserver will change the extent 
to make the image not distort. For some reason or another, xastir also does 
this, and the result is an image that appears compressed on the y-axis. Here 
are some screen shots of the problem:

http://aprsworld.net/tmp/xastir-screen.png
http://aprsworld.net/tmp/xastir-shot1.png
http://aprsworld.net/tmp/xastir-shot2.png

It appears that I'm going to have to do some serious hacking of mapserver to 
make it give me images with the exact extent specified.

-Jim KB0THN