Hi,
I'd like to re-open a quite old thread about breaking lines in
a network.
the old thread:
If each line is a straight line, then you have two nodes, one at each end.
So, do you mean that you want to break the longer line, thus creating two
new nodes, representing the new end points of the
Hi,
as an explanation I draw a little picture...
I like to have each line extra to have a common node on each crossing. I
would to have that in order to try handling tree structures and some
analysis in a database.
Thanks,
achim
Moritz Lennert schrieb:
On 03/07/09 12:10, achim wrote:
Hi,
So, I don't really see the possibility of having nodes on a network
line. Could you elaborate ?
I like to do something like zonal statistics on vector areas. Not with
rasters, but with vectors inside. That means eg:
length of all roads of a kind for every area. Or: longest road on
that area
Sorry, not very clear... They are snapped!
I wanted to show that I have
1) two lines (two cats) with no common nodes on the network
2) I want the longer to be broken on the node of the longer one in order
to have a common node (and three lines with three cats)
achim
Moritz Lennert schrieb:
On
On 07/07/09 12:18, achim wrote:
Sorry, not very clear... They are snapped!
I wanted to show that I have
1) two lines (two cats) with no common nodes on the network
2) I want the longer to be broken on the node of the longer one in order
to have a common node (and three lines with three cats)
v.edit tool=break cat=CatOfTheLineToBreak coords=CoordinatesOfYourNode
thresh=
v.edit tool=snap cat=CatOfTheBrokenLine,CatOfOtherLine thresh
You can get the coordinates of your nodes with v.to.db.
Thats what I was looking for. Thank you very much, Moritz! I didn't
recognized the break
On 07/07/09 14:23, achim wrote:
Sorry for complicated problem description. I am still a little confused
why v.net produces such lines that no new (poly)lines begin on each node
(picture).
I don't think that v.net produces any lines, except for the connecting
lines it creates when using
