r.line

using a HP Scanjet IIc. The drainage is depicted by dashed lines. This
form of data is causing a problem for r.line. It seems to want continuous
lines. The output of r.line has all the lines we want plus a lot of others
joining them together. It looks a lot like a plotter output without the pen
being raised at all. We do wish to join the lines to make them continuous
....

I had the same problem several months ago. This problem
was caused by a missing function call which is supposed
to clean the x,y values of previous lines. I've
debugged the problem and reported it to the net.
I think the source code should has been updated
accordingly by GRASS people.

I wonder when did you download the source code. If
it is a new downloading, then maybe the GRASS source
code hasn't been updated. I can post the bug to the net
again if necessary.

Jinn-Guey Lay
Dept. of Geography
National Taiwan Univ., Taiwan
jglay@ccms.ntu.edu.tw