[GRASS-user] scanned map, north not up

Steven Kasow skasow at gmail.com
Sat Aug 13 12:19:24 PDT 2016

Hello All,

I have been using GRASS with scans of my maps, to make GeoTiff files to use
on my smartphone.

Most of my maps have north up, I've been using UTM zone 18 and have had no

Two maps I am working with now have north not up, and upon georectifying in
GRASS become tilted. Exporting these to GeoTiff produces large wings of no
data on either side. Is there a way for me to use a different projection in
GRASS to have north match the direction on my printed map? Or is GRASS not
the right tool for this problem?


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