[mkgmap-dev] RE Commit r3801: merge split-shape branch

Tue Feb 21 11:45:49 GMT 2017

Hi Andrzej,

no, it causes lots of problems.
For example, the bounding box for planet is (-90.0, -180.0, 90.0, 180.0).
If we don't distinct the positions of the left side from the right the area is a line with width 0.

The funny thing is that the precision in OSM doesn't even use all possible 32 bit integers, only those for
-180 * 10_000_000 to 180 * 10_000_000  so the extreme values near Integer.MAX_VALUE are never used
(at least that is the conversion done in pbf or o5m format).

I think about using this format for Coord and maybe also Area.

Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej at poczta.onet.pl>
Gesendet: Dienstag, 21. Februar 2017 12:23:57
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] RE Commit r3801: merge split-shape branch

Hi Gerd,

 > I found new problems, e.g. 180.0 degrees and -180.0 degrees started
 > to give the same 32 bit value.

Isn't it good? The same is true for 24 bit precision and even for 8bit
angles.

--
Best regards,
Andrzej
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