[GRASS-user] Crown shape drawing

[Matteo Mura]

Thanks as the same Daniel.


2013/10/25 Daniel Victoria <daniel.victoria at gmail.com>

> Hi all,
>
> A while ago I had to do a similar task for Lidar analysis.... So I
> made a quick python program for it. The only problem is that it spits
> out boxes and not nice round shapes. The code will create both GRASS
> ASCII vector format or a csv file that can be used to subset las data.
> Also, since I created the program specifically for our needs, the
> column numbers are fixed.
>
> Anyway, the code is attached. Hope it helps.
>
> Cheers
> Daniel
>
> PS1 - I'm no professional coder so I'm certain there are flaws and
> leftover lines in the code. But it worked for me...
> PS2 - I have another version that will generate a shapefile with
> ellipses as crowns but the code is too messy. I'd like to make it more
> presentable before releasing it but, if you can stomach poorly writen
> python, just let me know...
>
>
> On Fri, Oct 25, 2013 at 8:33 AM, Nikos Alexandris
> <nik at nikosalexandris.net> wrote:
> > On Friday 25 of October 2013 07:56:32 Matteo Mura wrote:
> >> Dear all,
> >>
> >> I have a vector-points file containing the points of trees location in
> a 100
> >> x 100 square, it is a permanent plot. The database of this vector
> contains
> >> for each sampled tree the crown projection for each direction
> (N-S-E-W). I
> >> need to convert the points to polygons which shape and size is
> determined
> >> by the crown projection measures. In other therms I would like to have
> the
> >> polygon file which describe the tree crown shape and dimension.
> >>
> >> Is it possible to do in GRASS? If yes, how can I?
> >
> > Not a reply, just a comment: this is a very nice question! If this gets a
> > smart solution consider posting it at GIS at SE. GRASS GIS deserves/needs
> to
> > attract more points over there.
> >
> > Nikos
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>
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