[GRASS-user] breacklines and interpolation

[ivan marchesini]

Dear Users,
I have a vector map containing points and lines.
The points represents elevation (I have an attribute in the related
table) and the lines represents breacklines, i.e. lines where slope
change really fast. Using a regular grid to represent the DEM, without
considering the breacklines, can create some problem because we can't
consider the rapid changes in slope.
The breacklines are stream boundaries but doesn't close on themself, so
no way to create mask.... 
the breacklines haven't elevation attributes.
Is there a way to consider these breacklines during the interpolation???
a way to force the grid to consider these rapid changes in slope...???
thanks
Ivan



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Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
e-mail: marchesini at unipg.it
        ivan.marchesini at gmail.com
tel: +39(0)755853760
fax: +39(0)755853756
jabber: geoivan73 at jabber.org