[mkgmap-dev] [PATCH v1] - round coordinates when zoomed out

Tue Nov 17 10:20:02 GMT 2009

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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