Dear Kenneth
db.execute might be an option to fill a new column with what you want. I
am not an SQL expert, but I suppose it is possible to concatenate the
right strings if you do it for each order separately and count the
number of currents first.
Cheers,
Mira
On 10/12/2020 17.15, Kenneth Roy Cabrera Torres wrote:
Dear GRASS users:
Can you give any suggestions to solve this problem?
I have an ordered dataset of segments of river currents output from
r.stream.order command.
I will like to add a column to this dataset that identifies each
current according to Horton ordering.
I mean it actually identifies the Horton number. But what I want to do
is to separate each
Horton current from each order. For example, if I have, say 4 Horton
currents of order 5,
then I will like to have an additional column that identifies each
Horton current (5-1, 5-2, ..., 5-4).
I try with v.build.polyline and indeed it separates the individual
currents of the same
Horton order. But I don't know how to incorporate that new cat ID to
the current segments' dataset.
Thank you for your help.
--
Kenneth Roy Cabrera Torres
Cel 315 504 9339
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--
Dr. Mira Kattwinkel
Quantitative Landscape Ecology
iES Landau, Institute for Environmental Sciences
University of Koblenz-Landau
Fortstraße 7
76829 Landau
Germany
Phone: + 49 6341 280-31553
Office: Building I, Room 2.02
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