contour generation crossing Equator results in vertical lines

Hello -

I have discovered a contour generation problem when maps are made in areas of 
high contour density and cross the Equator. South of the Equator there are 
vertical lines (contour lines) that extend south for a number of kilometres. 
These lines are from contours that cross or are within 100 meters (south) of 
the Equator and do not “connect” or “complete” (except through these 
long lines). 

This problem is found across South America (I use Ecuador for testing) and 
probably occurs in Africa and Indonesia also.

Additional notes:

There is a gap of appx. 100 meters in the contour line with this problem
It does not occur to every contour line (only those that cross the Equator at 
an acute angle??)
Occurs to minor and major contours
Areas of low contour density (ex. East of Latitude -76) there are no problems, 
to the West (high density) there are
This problem has only been found south of the Equator, not north
Splitting file creation at the Equator did not correct the problem
Changing program settings did not correct the problem

Maps were created using program defaults. Version 1.2.267 and Java 1.7.055 and 
Linux 3.11.0-12

What steps will reproduce the problem?
1. Create map
2. View at Equator at area of high contour density
3.

What is the expected output? What do you see instead?

Continuous contour lines.
A a very ugly map with vertical lines.

Please use labels and text to provide additional information.

Thanks, pitney

Original issue reported on code.google.com by mappit...@gmail.com on 19 Jul 2014 at 8:08

phyosithu / osm2garmin

contour generation crossing Equator results in vertical lines #129