Mark Burton wrote: 
Having filled some gaps with that last little patch, I was wondering
why I still had quite a few gaps when zoomed out. Obviously, the coords
weren't being rounded to nearest given the zoom level. So, the
attached patch does that rounding and, lo and behold, even more gaps
have disappeared. 

Please give it a go, especially for maps that cross the equator/day
line where the coords flip signs. Sure to be buggy but it's looking
quite promising.

BTW - this patch does not contain the last patch but they probably
should be used together.

Mark
The first patch works great, without any negative side effects. As for this one (the second), I have many display problems related to it. I must say I prefer only the first patch. Mind this is using "lowest detail" in Mapsource, so errors are much more profound and easy to spot - they are present on medium detail too however. There are still a very few holes with both patches - though using only the first patch it is a great improvement compared to before.

The above patch only brings benefit from resolution 17 onwards for me. 18,19,20,22 I prefer without.
Problems are the same whether using Mapsource 6.13.7 or 6.15.7.

"Double Roads" - though in reality it is only one - this is a real no-go for me: - also see the distortion of the primary (yellow) on the top.


with first patch only:




crippled road (this problem is less apparent in Mapsource 6.15.7 due to antialising):

using first patch only.


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