I have problems with ghost-lines while creating or rendering contourlines at Level 12 + 13.
I seems that the problem occours at the border of the tiles, so I tested an area where nothing else exists
with different settings of bbox-enlargement [0,20,40].
With bbox-enlargement=0 its clear to see that ghostlines occour ot the border of the tiles and
with this setting over all zoom-levels.
With bbox-enlargement=20 or 40 the ghostlines disappear at level 14+
No idea if this is an issue of the map-writer or renderer.
It would be great if this issue could be solved, mapsforge has an enormous potential to create topo-maps and overcome Mobac
even on 32bit Windows equipment AND it's incedible how easy the appearence of the map can be changed even to create
a user friendly map of Iceland.
I include the map/osm/xlm's and script for the Herdubreid-area on Iceland.