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[mkgmap-dev] mkgmap r4048 seems to fix problem with hill shading

From Gerd Petermann GPetermann_muenchen at hotmail.com on Fri Jan 12 11:15:55 GMT 2018

Hi all,

I've changed the code so that when a sub tile (typically 64x64) is completely outside of the polygon (--dem-poly) 
is still encoded with a bit stream. This is how BuildDEMFile does it and it seems that this solves all problems reported
by Andrzej.
Before this I simply wrote a header that said "no bit stream, all heights are equal, highest value is invalid", 
but Garmin doesn't seem to like that.

The change means that a few more bytes are written to DEM, maybe also runtime is a bit higher.


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