[GRASS-dev] r.flow and G_message

[Michael Barton]

Jachym,

We're using r.flow heavily in a new landscape dynamics modeling package. The
information it prints to stderr has been a real problem all along for using
this from the GUI and in scripts. We've finally gotten around it, but at
times this almost made the module unusable.

I am strongly in favor of your suggestion to remove and/or reduce this extra
verbage that is a holdover from a time when all modules were run from the
command line by the user and without a GUI.

Thanks very much for looking into this.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton



> From: Jachym Cepicky <jachym.cepicky at centrum.cz>
> Date: Thu, 19 Oct 2006 21:21:04 +0200
> To: <grass-dev at grass.itc.it>
> Subject: [GRASS-dev] r.flow and G_message
> 
> hallo,
> 
> i do not know, how to solve fprints in r.flow.
> 
> The module use it's own function to print messages (diag)
> 
> When i removed this function and rewrite everything with help of
> G_message, the result is not well-arranged:
> 
> r.flow elevin=elevation.dem aspin=aspect barin=roads flout=tmp1
> lgout=tmp2 dsout=tmp3 --o
> Opening output files...
> WARNING: The vector 'tmp1' already exists and will be overwritten.
> Done
> Allocating memory: elevation
> aspect
> barrier
> density
> flowline header
> e/w distances
> quantization tolerances
> Reading input files: elevation...
> aspect
> barrier
> Precomputing: tangents
> e/w distances
> quantization tolerances
> re-oriented aspects
> Working...
> Done%
> Writing density file...
> Done
> Closing files...
> Building topology ...
> 0 primitives registered
> 0 areas built
> 0 isles built
> Attaching islands:
> Attaching centroids: Topology was built.
> Number of nodes     :   0
> Number of primitives:   0
> Number of points    :   0
> Number of lines     :   0
> Number of boundaries:   0
> Number of centroids :   0
> Number of areas     :   0
> Number of isles     :   0
> Done
> De-allocating memory...
> Done
> 
> What to do? Should I remove all informations about reading, precomputing
> and  allocating for each raster map? I suggest, that the most verbose
> output could look like this:
> 
> Opening output files...
> WARNING: The vector 'tmp1' already exists and will be overwritten.
> Allocating memory for maps
> Reading input files
> Precomputing
> Working
> Writing density file
> Closing files
> Building topology
> 0 primitives registered
> 0 areas built
> 0 isles built
> Attaching islands:
> Attaching centroids: Topology was built.
> Number of nodes     :   0
> Number of primitives:   0
> Number of points    :   0
> Number of lines     :   0
> Number of boundaries:   0
> Number of centroids :   0
> Number of areas     :   0
> Number of isles     :   0
> Done
> De-allocating memory
> 
> what would you say?
> 
> jachym
> -- 
> Jachym Cepicky
> e-mail: jachym.cepicky at centrum.cz
> URL: http://les-ejk.cz
> GPG: http://les-ejk.cz/gnupg_public_key/jachym_cepicky-gpg_public_key.asc
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