Ubuntu Manpage: v.to.points - Create points along input lines in new vector with 2 layers.
v.to.points  - Create points along input lines in new vector with 2 layers.
input line and along - the distance from line's start.
exact distance from the beginning of the vector line the user should use v.segment.
Points and centroids can be  considered  as  "lines"  with  only  one  node.
parameter is that all points/centroids get written into the  output  vector.
the start and end of its own "line".
topological boundary, the boundary only gets converted to points once.
converted to a point in the output vector for type=area.
exactly the beginning, middle and end of the input line.