Re: [Qgis-user] Multiple Symbolization Rules per Layer

2009-04-22 Thread Agustin Lobo

I think this would be solved by item 30 in
http://sites.google.com/site/eospansite/myqgiswishlist
?
Just to make sure I don't have to add another item to the list

Agus

Andreas Neumann wrote:

Hi,

I have to symbolize our community's waste water network. My problem is
that I need more than one symbolization rules per Layer.

As an example the stroke should be derived from one attribute while the
stroke-style (e.g. different stroke-dashing) should be derived from a
different attribute. This means I would need more than one symbolization
rule to correctly style this layer.

Is this possible with QGIS or would I need to create a new attribute
combining those attributes in a single attribute for symbolization?

Thanks for any ideas,
Andreas

  


begin:vcard
fn:Agustin Lobo
n:Lobo;Agustin
org:Institut de Ciencies de la Terra Jaume Almera CSIC
adr:;;Lluis Sole Sabris s/n;Barcelona;;08028;Spain
email;internet:agustin.l...@ija.csic.es
url:http://www.ija.csic.es/gt/obster
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Re: [Qgis-user] Multiple Symbolization Rules per Layer

2009-04-22 Thread Andreas Neumann
Hi Agus,

while I agree that your suggestion makes sense and would help for many
purposes, in my case it wouldn't help.

What I wanted to do is to style line elements according to three different
attributes. In my case I have to handle the waste-water network.

* Attribute Utility should define the line-color
* Attribute accuracy should define stroke-dashing
* Attribute hierarchical_function should define stroke-width

You cannot solve this problem through multiple loading of the same layer.
The only current way is by concatenating the three attributes into a
single attribute and than style all the combinations. Of course this can
be quite a lot of work and not very elegant if you have a lot of
combinations. If you have three distinct values for every attribute, you
already have 27 different cases to handle.

Andreas


On Wed, April 22, 2009 8:43 am, Agustin Lobo wrote:
 I think this would be solved by item 30 in
 http://sites.google.com/site/eospansite/myqgiswishlist
 ?
 Just to make sure I don't have to add another item to the list

 Agus

 Andreas Neumann wrote:
 Hi,

 I have to symbolize our community's waste water network. My problem is
 that I need more than one symbolization rules per Layer.

 As an example the stroke should be derived from one attribute while the
 stroke-style (e.g. different stroke-dashing) should be derived from a
 different attribute. This means I would need more than one symbolization
 rule to correctly style this layer.

 Is this possible with QGIS or would I need to create a new attribute
 combining those attributes in a single attribute for symbolization?

 Thanks for any ideas,
 Andreas






-- 
Andreas Neumann
http://www.carto.net/neumann/
http://www.svgopen.org/

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Re: [Qgis-user] Multiple Symbolization Rules per Layer

2009-04-22 Thread Martin Dobias
On Wed, Apr 22, 2009 at 1:56 PM, Andreas Neumann a.neum...@carto.net wrote:

 For a future QGIS version it would be cool if there would either support for:

 * multiple symbolization rules
 * data-defined styling for stroking/filling - as you already do with
 data-defined text-styles.

 Multiple symbolization would also be cool for multiple symbolizations of
 the same layer for different map scales (without having to load the layer
 multiple times). Autodesk Map3D handles this nicely.

It would be surely nice to have these features...
The new generation symbology I'm developing doesn't include neither of
them, but I'm trying to keep it extensible so such addition in future
would be possible. I think this is one of the features where creating
usable GUI is actually harder than the implementation itself :)

Martin
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Re: [Qgis-user] Multiple Symbolization Rules per Layer

2009-04-22 Thread Agustin Lobo

Certainly at some point. But I think that the trac is actually not
easily followed by users. Actually, what I'm doing now is the other way 
around:

I'm incorporating to a newer page all the tickets labeled as improvements +
those currently listed in my page and including the link to the ticket.
The idea behind all this is that ideas for enhancements must be discussed
and agreed upon by users before they become tickets. Hopefully users
should also establish priorities.

Agus

Paolo Cavallini wrote:

Agustin Lobo ha scritto:
  

Understood, added as #32 in
http://sites.google.com/site/eospansite/myqgiswishlist
(who knows, some dev might read it at some point)



Hi Agus.
Why not adding these to the wishlist in the QGIS trac?
This way, devs sooner or later will certainly read them.
All the best.
  


begin:vcard
fn:Agustin Lobo
n:Lobo;Agustin
org:Institut de Ciencies de la Terra Jaume Almera CSIC
adr:;;Lluis Sole Sabris s/n;Barcelona;;08028;Spain
email;internet:agustin.l...@ija.csic.es
url:http://www.ija.csic.es/gt/obster
version:2.1
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[Qgis-user] Multiple Symbolization Rules per Layer

2009-04-20 Thread Andreas Neumann
Hi,

I have to symbolize our community's waste water network. My problem is
that I need more than one symbolization rules per Layer.

As an example the stroke should be derived from one attribute while the
stroke-style (e.g. different stroke-dashing) should be derived from a
different attribute. This means I would need more than one symbolization
rule to correctly style this layer.

Is this possible with QGIS or would I need to create a new attribute
combining those attributes in a single attribute for symbolization?

Thanks for any ideas,
Andreas

-- 
Andreas Neumann
http://www.carto.net/neumann/
http://www.svgopen.org/

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Re: [Qgis-user] Multiple Symbolization Rules per Layer

2009-04-20 Thread Martin Dobias
On Mon, Apr 20, 2009 at 11:13 AM, Andreas Neumann a.neum...@carto.net wrote:
 Hi,

 I have to symbolize our community's waste water network. My problem is
 that I need more than one symbolization rules per Layer.

 As an example the stroke should be derived from one attribute while the
 stroke-style (e.g. different stroke-dashing) should be derived from a
 different attribute. This means I would need more than one symbolization
 rule to correctly style this layer.

 Is this possible with QGIS or would I need to create a new attribute
 combining those attributes in a single attribute for symbolization?

Hi Andreas,

currently it's possible to use only one attribute for the
symbolization, so combination of the two attributes should do the job.

Another option would be to write a special renderer class, however
this has its own glitches.

Regards
Martin
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