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Today's Topics:
1. Re: grass.run_command issue for display a vector and its
labels (Glynn Clements)
2. Re: grass.run_command issue for display a vector and its
labels (Markus Neteler)
----------------------------------------------------------------------
Message: 1
Date: Tue, 6 Nov 2012 23:49:32 +0000
From: Glynn Clements <gl...@gclements.plus.com>
To: "Liu, Huili" <h...@ap.org>
Cc: "grass-windows@lists.osgeo.org" <grass-windows@lists.osgeo.org>
Subject: Re: [GRASS-windows] grass.run_command issue for display a
vector and its labels
Message-ID: <20633.41484.737027.324...@cerise.gclements.plus.com>
Content-Type: text/plain; charset=us-ascii
Liu, Huili wrote:
> I am running an issue to display a vector and overlay its label on
> the top by using grass.run_command (WinGrass-6.4).
> For example,
> grass.run_command('d.vect', map='my_shape')
> grass.run_command('d.labels', labels='my_shape_labels')
>
> First one created a default.png but second command overwrote
> default.png with the labels only.
> Can anyone point to me if one grass.run_command can handle multiple
> commands like
> grass.run_command(('d.vect', map='my_shape'; 'd.labels',
> labels='my_shape_labels') to generate one default.png with two
> layers information such as vector and its labels? Or is there any
> better way to do it? I was thinking about v.overlay but I look for
> the above possibility.
If the environment contains the setting GRASS_PNG_READ=TRUE, d.*
commands should overlay their output on an existing image. So the
following should work:
grass.run_command('d.vect', map='my_shape')
env = os.environ.copy()
env['GRASS_PNG_READ'] = 'TRUE'
grass.run_command('d.labels', labels='my_shape_labels', env = env)
--
Glynn Clements <gl...@gclements.plus.com>
------------------------------
Message: 2
Date: Wed, 7 Nov 2012 08:57:35 +0100
From: Markus Neteler <nete...@osgeo.org>
To: Glynn Clements <gl...@gclements.plus.com>
Cc: "grass-windows@lists.osgeo.org" <grass-windows@lists.osgeo.org>
Subject: Re: [GRASS-windows] grass.run_command issue for display a
vector and its labels
Message-ID:
<calfmhhu2ajwsqbvk8akqf3gw1bmsrnfcducsaksoec4v+r6...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
On Wed, Nov 7, 2012 at 12:49 AM, Glynn Clements
<gl...@gclements.plus.com> wrote:
> Liu, Huili wrote:
>> I am running an issue to display a vector and overlay its label on
>> the top by using grass.run_command
...
> If the environment contains the setting GRASS_PNG_READ=TRUE, d.*
> commands should overlay their output on an existing image. So the
> following should work:
>
> grass.run_command('d.vect', map='my_shape')
> env = os.environ.copy()
> env['GRASS_PNG_READ'] = 'TRUE'
> grass.run_command('d.labels', labels='my_shape_labels', env = env)
Added to the Wiki as
http://grass.osgeo.org/wiki/GRASS_Python_Scripting_Library#Display:_overlayed_map_display_with_labels
Markus
------------------------------
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End of grass-windows Digest, Vol 67, Issue 2
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