Have site data need raster data (fwd)

[Simon Cox]

Chris

One way would be to do a spline interpolation to a raster 
(using s.surf.tps), then use r.transect to get the 
values along your chosen transect.  You could also do something 
with r.mapcalc to generate a new raster with only the transects:  eg

tmap = if(online,pressure,0)

where online is your map of the transects of interest, pressure is 
your interpolated pressure map, and tmap is the output

Cheers

Simon