Hello,
today I have two questions...
No 1.
r.water.outlet doesn't produce the hole outlet. I chose coordinates E
and N from point coordinates. The point was converted from a raster-cell
via r.to.vect. For illustration I attach a screenshot.
No 2.
I'd like to select the raster-cell with the highest value. I converted
the raster to points and tried to select with SELECT WHERE. How can I
use an maximum-statement in it? I couldn't fix it out. Or is there
another way? (I use the default db)
Best regards,
achim
(attachments)
Hi,
achim píše v Út 03. 03. 2009 v 17:52 +0100:
Hello,
today I have two questions...
No 1.
r.water.outlet doesn't produce the hole outlet. I chose coordinates E
and N from point coordinates. The point was converted from a raster-cell
via r.to.vect. For illustration I attach a screenshot.
IMHO, this is caused by rough raster resolution. You have to click to
some other place in order to get outlet you ar looking for
No 2.
I'd like to select the raster-cell with the highest value. I converted
the raster to points and tried to select with SELECT WHERE. How can I
use an maximum-statement in it? I couldn't fix it out. Or is there
another way? (I use the default db)
something like SELECT cat FROM points WHERE z = (SELECT max(z) FROM
points);
However, I'm afraid, this is not possible with DBF driver, you'll have
to convert the database e.g. into postgresql or sqlite
j
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Jachym Cepicky
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