[GRASS-dev] Which are the strds 'columns'?

[Nikos Alexandris]

* Veronica Andreo <veroandreo at gmail.com> [2017-10-22 13:18:09 +0200]:

>I added a note in the wiki [0] and I will add similar note(s) in [1]
>because, as Soeren said, it is common to all t.* modules with where option.
>I will think how to add some note in each manual with a where option.
>
>[0]
>https://grasswiki.osgeo.org/wiki/Temporal_data_processing#Listing_maps_and_selections
>[1]
>https://trac.osgeo.org/grass/browser/grass/trunk/temporal/temporalintro.html

(Sorry for bottom-posting, want to break the discussion to a new
"thread")

It is, and was, clear that the `t.rast.list` module does exactly
what it is named for. It lists the raster maps of an strds and their
properties.

On the other hand, the skepsis on t.rast.univar to be able to report
maps with a where SQL query that accepts mean values as a "column" is of
interest.

Univariate statistics are computed and reported. Is it really
such a computational overhead to keep that "mean", or any other of the
descriptive statistics, and re-loop over the maps to filter the output?

I feel it's worth it to avoid the extra post-processing step, outside of
GRASS' environment. May I open an enhancement request?

Thank you, Nikos

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