On 16/10/13 07:59, Wiley Bogren wrote:
hi GRASS community!
I'm amazed how well this software handles vector operations - especially
the overlay operation seems unparalleled in open source software. Thank
you very much to everyone who has been involved in the development process!
I would like to script a workflow where I apply the same set of
operations on a few hundred sets of shapefiles, consisting of v.in.ogr,
several sets of v.overlay, some database operations and v.out.ogr. The
shapefiles are 20-30MB apiece, containing many polygons, each with many
vertices.
Is there a difference in speed or processor efficiency between the
different scripting approaches? By which I mean python vs bash shell,
and within the GRASS environment vs calling the functions from outside
the environment (like via python grass.script).
Thank you for any opinions or advice!
I see that no one ever answered this. AFAIK, speed will depend on how
much you do in the script and how much you have GRASS modules do. The
latter don't change their speed depending on the scripting language
calling them, so if you only use the script to link different GRASS
modules, I would think that time difference will be negligible between
languages.
Moritz
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