[GRASS-user] v.to.points doesn't create a point layer?

[Mehrdad Varedi]

Great! Thank you Micha,
I had reset the region and forgot to set it properly. Thanks for your help.

The team here are all amazing! Good work and I hope someday I could
compensate so much support :)

M.

ᐧ

On Sun, Oct 21, 2018 at 1:18 AM Micha Silver <tsvibar at gmail.com> wrote:

>
> On 10/21/18 7:37 AM, Mehrdad Varedi wrote:
>
> Hi,
> I was using v.what.rast and I got an error that no point layer was found.
> the layer that was passed was created using v.to.points from a vector file.
>
> The v.to.points creates two tables in SQLite and I didn't like it.  I
> exported it to a geo package format and then imported it as the point layer
> I wanted to see.(is there another way, please let me know)
>
>
> What was the input to v.to.points?  The two tables in sqlite result from
> the way that v.to.points works: it creates 2 "layers" attached to the
> output points vector: layer 1 with the categories of the original lines (or
> boundaries) and layer 2 with new individual categories for each point.
>
>
> So when you go to the next step, v.what.rast, you probably want to specify
> "layer=2"
>
>
> I tried v.what.rast and I experienced the same error that a point layer
> can't be found on both point layers.This is the v.what.rast command that
> generates an error:
>
> v.what.rast --verbose map=POM at Mehrdad raster=ABC at Mehrdad column=ABC
>
> The error is:
> Reading features from vector map...
> No features of type (point) found in vector map <POM at Mehrdad>
>
> questions:
> -  Do you know a way that v.to.points creates only one table in SQLite?
> - Why I get the error in v.what.rast? I have looked at the POM and it is
> really a points layer (it appears like that in GRASS)
>
>
> First guess: have you set the computational region to the ABC raster??
> (FAQ # 0 in GRASS)
>
> Please post the outputs from:
>
> g.region -p
>
> r.info ABC
>
> v.info POM
>
>
> Thanks for your help,
>
> Mehrdad
>
>
>
> --
> Mehrdad Varedi
> ᐧ
>
> _______________________________________________
> grass-user mailing listgrass-user at lists.osgeo.orghttps://lists.osgeo.org/mailman/listinfo/grass-user
>
> --
> Micha Silver
> Ben Gurion Univ.
> Sde Boker, Remote Sensing Lab
> cell: +972-523-665918
>
>

-- 
Mehrdad Varedi
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