[GRASS-user] v.in.ply - GRASS7

[Markus Metz]

On Mon, May 6, 2013 at 1:14 AM, Carla Rebelo <crrebelo at gmail.com> wrote:
> Hello,
>
> I'm a user of GRASS7 in UBUNTU 12.04.
>
> I tried to import a PLY File to a GRASS vector points cloud - "cat2.ply".
> v.in.ply input=/home/xxxx/cat2.ply output=cat2xyz
> Load:
> ply
> format ascii 1.0
> comment GRASS GIS generated
> element vertex 8139
> property float x
> property float y
> property float z
> element face 0
> property list uchar int vertex_indices
> end_header
> -96808.46704 -99911.92501 140.613663
> -96808.25806 -99912.06045 140.449142
> -96597.86902 -99913.83076 146.655823
> -96599.28461 -99913.11427 146.4449
> -96599.08022 -99913.21988 146.298218
> .................
>
> FIRST PROBLEM in results: Only appears the column "Cat" in the table
> attributes of cat2xyz. But, within the GRASS6.4.2 this action writing the
> columns x,y,z.

If you want the coordinates also in the table, you can upload
coordinates with v.to.db.

v.in.ply for GRASS 7 is designed for large point clouds with the
possibility to have only coordinates, no attribute table (for speed
reasons).


> ................................................................................................
>
>
> So, I repeat this action with the following  statement : v.in.ply
> input=/home/xxxxx/cat2.ply output=cat2xyz_v1 x=4 y=5 z=6
>
> cat2xyz_v1: The four columns cat,x,y,z in results. But, the GRASS vector
> missed the region parameters...

Because of x=4 y=5 z=6. The default x=1 y=2 z=3 should work just fine, i.e. just
v.in.ply input=/home/xxxxx/cat2.ply output=cat2xyz_v1

Markus M

> v.info -g map=cat2xyz_v1 at PERMANENT
> north=0
> south=0
> east=0
> west=0
> top=0.000000
> bottom=0.000000
>
> I would like to get a correct file with the x,y,z coordinates. Is there any
> solution for this?
>
> Thanks a lot.
>
> Best regards,
> Carla
>
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