[GRASS-dev] Re: [GRASS GIS] #82: new module: v.to.3d

[Dylan Beaudette]

On Sun, Dec 14, 2008 at 6:33 PM, GRASS GIS <trac at osgeo.org> wrote:
> #82: new module: v.to.3d
> --------------------------+-------------------------------------------------
>  Reporter:  hamish       |       Owner:  martinl
>      Type:  task         |      Status:  assigned
>  Priority:  major        |   Milestone:  6.4.0
>  Component:  Vector       |     Version:  svn-develbranch6
> Resolution:               |    Keywords:
>  Platform:  Unspecified  |         Cpu:  Unspecified
> --------------------------+-------------------------------------------------
> Comment (by hamish):

I am wondering-- would it be simpler to add a flag to v.drape for
converting vectors to 3D, with all z-values set to some constant? Or
is that not what v.to.3d does?

Dylan

>
>  Replying to [comment:3 martinl]:
>  > I am not sure which module to use for reverse transformation
>  > (3D->2D).
>
>  points, centroids: v.out.ascii | v.in.ascii (without -z or z=). then you'd
>  need to copy+merge tables adding in the new z column.
>
>  polyfeatures: v.out.ascii format=standard | awk to strip away the third
>  column | v.in.ascii format=standard. I think layer/cat setting at end of
>  each feature is ok as it is always like "1 1", never a third column.
>  AFAICT there's no way to keep the data in that 3rd column, as a line can
>  only hold a single attribute/cat. the user can summarize with v.univar if
>  they want that...?
>
>
>  ?
>  Hamish
>
> --
> Ticket URL: <https://trac.osgeo.org/grass/ticket/82#comment:5>
> GRASS GIS <http://grass.osgeo.org>
>
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