[GRASS-user] Re: Exporting attributes to GMT ASCII format using v.out.ogr

[Benjamin Ducke]

IMHO choosing line/boundary as a default for ANY map 
(i.e. even one that has no such geometries) is a bug,
not useful default behaviour.

So I would expect any scripts that use v.out.ogr in earnest
to be setting the type= option explicitly, anyhow.

The problem reported earlier with exporting areas
to GMT format seems to me to illustrate this.
The relationship between lines, boundaries and areas
can be very confusing, especially when data export/import
is concerned.

Actually, I would like to improve the area export logics
so that problems like Eric experienced will get more rare
in the future.

Anyhow, if there is a consensus that the old default
behaviour needs to stay, I will change the automatic
export type determination to only run on user demand,
via a flag.

Cheers,

Ben

----- Original Message -----
From: "Hamish" <hamish_b at yahoo.com>
To: "Eric Patton" <epatton at nrcan.gc.ca>
Cc: "grass-user" <grass-user at lists.osgeo.org>, "Hermann Peifer" <peifer at gmx.eu>
Sent: Monday, September 21, 2009 9:35:49 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna
Subject: [GRASS-user] Re: Exporting attributes to GMT ASCII format using v.out.ogr

Hamish:
> > I would ask if it acts any differently in latest grass
> > 6.5 or 7 svn builds? (6.5 change may be reverted as it may
> > break backwards compatibility / expected behaviour)

Eric:
> Which change are you referring to? I'm using the latest
> 6.5.svn, and all seems to run smoothly.

make that "in new cases make things better, but subtly break backwards compatibility / expected behaviour in existing scripts."
ie an old script for 6.x should produce the same output as a new script at the cost of the default action not being as nice.
I don't really know if this is just hypothetical or if it could really screw somebody up. (ie if it matters or not)

r39128
https://trac.osgeo.org/grass/log/grass/branches/develbranch_6/vector/v.out.ogr


Hamish



      
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