[Flightgear-devel] Tears along lines delineating bucket widths

[Ben Peddell]

On the 25th of May, I discovered that FlightGear has tears along the 
22nd, 62nd, 76th, 83rd, 86th and 88th latitudes north or south out at 
sea, and everything between the 89th latitude north or south and the 
adjacent pole is completely missing (i.e. no sea or ground). These are 
that latitudes in sg_bucket_span() in "simgear/bucket/newbucket.hxx" in 
SimGear. I haven't looked deep enough to locate the source of this problem.
I suspect that another problem - every tile with its north edge on the 
22nd latitude south having its north-west corner missing - is related to 
this. This last problem is also showing up in the tiles made by Map from 
the Atlas package.

Here's a diagram:
        1 1 1 1 1 1 1 1 1
        1 1 1 1 1 1 1 1 1
        6 6 6 6 6 6 6 6 7
        . . . . . . . . .
        0 1 2 3 5 6 7 8 0
        0 2 5 7 0 2 5 7 0
        0 5 0 5 0 5 0 5 0
s21.750 +---------------+
        |###############|
s21.875 |###############|
        |###############|
s22.000 +-+#+-+#+-+#+-+#+
        |/##|/##|/##|/##|
s22.125 +###+###+###+###+
        |###############|
s22.250 +---------------+
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