[Xastir] MGRS/Maidenhead grid squares.

[Tapio Sokura]

James Ewen wrote:
> The grid lines fall exactly where they should to outline the Maidenhead grid
> squares... 

I just noticed that the Maidenhead grid calculation in Xastir is 
slightly incorrect. For example when I zoom close to 60N/20E crossing 
the status line says 20E, 59 deg 59.983 min N is already KP00AA, but it 
should be KO09AX right upto 59 deg 59.999 minutes N (the change happens 
between 59.982 and 59.983). This seems to be visible on any south-north 
maidenhead border, the change happens 0.017 minutes too soon (use zoom 
level 1).

East-west direction calculation seems to be ok, the change happens right 
at the degree border.

I ran into this error as I was thinking about adding two more characters 
to the maidenhead grid square calculation to make it 8 characters. I did 
it by changing a few lines of sec_to_loc function in util.c, but on 
display it didn't look nice so I'm not going to suggest expanding the 
calculation to 8 characters. If one wants to know his locator with 
better accuracy than 6 characters, I guess he won't be using Xastir 
anyway for that.

   Tapio