Dear GRASS users,
I have a question about the creation of a spatio-temporal vector datasets
I have a vector points map representing sample sites and it includes a field of the attribute table describing the sampling date (a different day, not sequential, for each point).
I would like to transform the vector point map into a stvds in order to use it with t.vect.what.strds.
My question is: is it possible to register the vector point map as a stvds?
thank you
Ivan
Hello Ivan,
Space-time datasets in GRASS are map based, so, you either need to create one vector map per date and then create the time series and register the maps there, or in the case of STVDS, you could also add a different layer per date to the same vector map and register those as in: https://grass.osgeo.org/grass80/manuals/t.register.html#north-carolina-dataset (see the “Register a vector map with layers representing time steps” example)
HTH,
Vero
El vie, 22 jul 2022 a las 14:34, Ivan Marchesini (<ivan.marchesini@gmail.com>) escribió:
Dear GRASS users,
I have a question about the creation of a spatio-temporal vector datasets
I have a vector points map representing sample sites and it includes a
field of the attribute table describing the sampling date (a different
day, not sequential, for each point).I would like to transform the vector point map into a stvds in order to
use it with t.vect.what.strds.My question is: is it possible to register the vector point map as a stvds?
thank you
Ivan
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Thank you for your answer Veronica,
in the meantime I found an addons that does exactly what I need: sample a strds at specific point in space and time defined by means of a point vector layer having an attribute column with dates (tool prepared by @Luca Delucchi: thank you)
I put the link here for anyone that in the future may have a similar problem:
https://grass.osgeo.org/grass82/manuals/addons/t.rast.what.aggr.html
thank you again
Ivan
On 24/07/22 13:07, Veronica Andreo wrote:
Hello Ivan,
Space-time datasets in GRASS are map based, so, you either need to create one vector map per date and then create the time series and register the maps there, or in the case of STVDS, you could also add a different layer per date to the same vector map and register those as in: https://grass.osgeo.org/grass80/manuals/t.register.html#north-carolina-dataset (see the “Register a vector map with layers representing time steps” example)
HTH,
Vero
El vie, 22 jul 2022 a las 14:34, Ivan Marchesini (<ivan.marchesini@gmail.com>) escribió:
Dear GRASS users,
I have a question about the creation of a spatio-temporal vector datasets
I have a vector points map representing sample sites and it includes a
field of the attribute table describing the sampling date (a different
day, not sequential, for each point).I would like to transform the vector point map into a stvds in order to
use it with t.vect.what.strds.My question is: is it possible to register the vector point map as a stvds?
thank you
Ivan
grass-user mailing list
grass-user@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-user