Using UTM projection

[John07]

From talk-de (I have the contact email address):

Currently, Walking-Papers seems to use "Spherical Mercator" (the one
OSM, Google and the others use).

For regional topographical survey, it's better to use the UTM
projection instead. That would it make possible to do accurate
measurements of real world in meters and draw accurate angles
and values on paper.

The scanned images could be reprojected using GDAL-utilies to
Spherical Mercator.

I could give you technical support on this, since I've created
my paper maps that way before Walking-Papers appeared :-)