"Holes" in contours by srtm2osm

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?

https://www.magentacloud.de/lnk/HcggnnBZ

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 :slight_smile:

Andreas