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@Mehrdad
raster=ABC@Mehrdad column=ABC
The error is:
Reading features from vector map...
No features of type (point) found in vector map
<POM@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
![]() ᐧ
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-user
--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918
|
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-user
