Hi,
I need to reclassify a vector in the following way: based on a column of
type string I have to create a new column of type string based on certain
rules that I give upon the first column, and I thought it would be really
handy if I could do it like CASE WHEN... THEN ...
I have tried to feed
Hi Margherita,
I offer my suggestion below as someone who uses varied (and any) product
needed to get a job done quickly and correctly.
If you are able to open your vector dataset in QGIS (by simply dragging
and dropping it into the 'Layer' panel), then take a look at the "Field
Calculator"
Ciao Madi,
You could use db.execute and do something like:
db.execute sql="ALTER TABLE vectormap ADD COLUMN reclass_column TEXT;
UPDATE vectormap SET reclass_column = CASE
WHEN old_column = ' old value 1' THEN ' new value 1'
WHEN old_column = ' old value 2' THEN ' new value 2'
WHEN
Ciao Stefan,
thank you, I tried and it didn't give me any error but didn't update the
column either...
On Wed, Jun 17, 2020 at 12:16 PM Stefan Blumentrath <
stefan.blumentr...@nina.no> wrote:
> Ciao Madi,
>
>
>
> You could use db.execute and do something like:
>
> db.execute sql="ALTER TABLE
Hi All,
Does GRASS has the ability to model smoke plumes especially those with
toxic fumes or fallout using Voxels or something similar?
Kind Regards
Ian
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Here is the documentation for the LIKE operator in SQLite:
https://www.sqlitetutorial.net/sqlite-like/
It should be possible to use it in a “searched case statement”:
https://www.sqlitetutorial.net/sqlite-case/
So the syntax would be:
db.execute sql="UPDATE myroads SET width=CASE WHEN TYPE LIKE
Hello Ian,
I do not know exactly what you refer to by modeling smoke plumes, but
indeed GRASS supports 3D raster data as well as time series of 3D raster
data or voxels and 3D algebra. Have a look at r3.* and t.rast3d.* modules
here https://grass.osgeo.org/grass79/manuals/full_index.html#r3 and
Dear Micha,
On Wed, Jun 17, 2020 at 4:05 PM Micha Silver wrote:
>
> On 17/06/2020 16:14, Margherita Di Leo wrote:
>
> Ciao Stefan,
>
> thank you, I tried and it didn't give me any error but didn't update the
> column either...
>
>
>
> The sqlite CASE statement should be:
>
> CASE WHEN '' THEN
