[GRASS-user] Problems with v.what.rast

[Rebecca Bennett]

Good Morning,

So yesterday, with lots of help from Micha and Martin, I got a vector file with a new column using bash. However when I try to run v.what.rast I get the continuous error

v.what.rast vector=Contour_points_cats at PERMANENT raster=dartmoor1 at PERMANENT layer=1 column=rast_value
"No record for category 553 in table <Contour_points_cats>
No record for category 263 in table <Contour_points_cats>
No
record for category 668 in table <Contour_points_cats>" etc etc

then the tool crashes without writing any values to the vector. I have checked that all points are both within the region and the raster extent and that the column type is correct for my float raster. Does anyone have any suggestions as to what I might be doing wrong?

Many thanks for reading,
Rebecca





________________________________
From: Micha Silver <micha at arava.co.il>
To: Rebecca Bennett <rabennett at ymail.com>
Cc: Martin Landa <landa.martin at gmail.com>; grass-user at lists.osgeo.org
Sent: Wed, 9 June, 2010 10:12:28
Subject: Re: [GRASS-user] Re: Problems with v.what.rast

 On 09/06/2010 11:40, Rebecca Bennett wrote: 
> 
>Hi Martin,
>
>>I tried the command that Micha suggested v.db.addcol
>map=Contour_points_cats at PERMANENT layer=1
>>columns="rast_value double precision" but this age the following error
>
>
The quotes " " around the "rast_value DOUBLE PRECISION" are necessary.
Just to check can we see the output of 
v.info -c Contour_points_cats

You might also check that the points are all within the raster region.
i.e.:
v.info -g Contour_points_cats
r.info -g Dartmoor1
g.region -p
 

v.db.addcol Contour_points_cats col=rast_value DOUBLE PRECISION
>>Sorry <DOUBLE> is not a valid option
>>Sorry <PRECISION> is not a valid option
>
>>So through the GUI I added a column to the attribute table which gave
>the command line out put 
>>v.db.addcol map=Contour_points_cats at PERMANENT layer=1
>{columns=rast_value double precision}
>
>>cheers!
>
>
>
>
________________________________
From: >Martin Landa <landa.martin at gmail.com>
>To: Rebecca Bennett
><rabennett at ymail.com>
>Cc: Micha Silver
><micha at arava.co.il>; grass-user at lists.osgeo.org
>Sent: Wed, 9 June,
>2010 9:37:14
>Subject: Re:
>[GRASS-user] Re: Problems with v.what.rast
>
>>Hi,
>
>>2010/6/9 Rebecca Bennett <rabennett at ymail.com>:
>>> I added a column v.db.addcol map=Contour_points_cats at PERMANENT
>layer=1
>>> {columns=rast_value double precision} (as my raster is a float),
>then ran
>>> with error
>
>>how did you get this command?
>
>>It should be
>
>>v.db.addcol map=Contour_points_cats at PERMANENT layer=1
>>columns="rast_value double precision"
>
>>Martin
>
>>-- 
>>Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa
>
>
>
>>This mail was received via Mail-SeCure System.
>


-- 
Micha Silver
http://www.surfaces.co.il/
Arava Development Co.  +972-52-3665918



      
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