[mkgmap-dev] help needed

Fri Aug 1 12:45:18 BST 2014

Hi Gerd,

 > JOSM doesn't display the so called great circle

It's a bit disappointing that QGIS and Global Mapper don't use great 
circles either. Probably for faster redraw.

Global Mapper can use great circle for distance tool. Drawing all lines 
with this tool I can estimate distance to about 14km. Funny is that 
great circle comes 14km above point D, while rhumb line is 29km below D. 
Your reference was correct saying, that D is right of course.

Mapsource draws direct routes as great circle, this can be used to 
calculate distance too, see attached picture.

-- 
Best regards,
Andrzej

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