Hi,
I used srt2osm to build contour-lines in my maps. Everything went ok until I tried to do so within the alps.
I got small areas where the contour-lines produce “holes” in between areas where the contour lines look ok.
Has anyone seen similar results. Any hint to prevent this?
Depends on data, which you are using. Older versions of SRTM really contains holes - missing data. Better use CGIAR or SRTM v3.
http://www.cgiar-csi.org/data/srtm-90m-digital-elevation-database-v4-1
https://e4ftl01.cr.usgs.gov/SRTM/
Hi,
thx for the hint. I got better hgt-files from http://www.viewfinderpanoramas.org/Coverage%20map%20viewfinderpanoramas_org3.htm
Now the holes are filled 
Andreas