[Qgis-user] Plugin to add a layer for each unique value in acolumn

[James Stott]

Hi Nathan/Andreas,

I would happily use another method to deal with this but I haven’t managed to come up with one.

My layer has site boundaries (20 of them) on it. I also have a layer with buffers for my sites in it. I have a buffer per site (20 sites) and these are from a PostGIS view as these alter whenever I change the site boundary. I would like to then add each site boundary and each buffer onto a map as a separate layer because:

1) I add the site boundary and the buffer to a group, then the users can then turn each one on and off as needed when looking at the project file in QGIS. 

2) For map production (using composers) I have a composer per site. I lock the layers in the composer map item and then jpg all my maps at the end. To do this I need to have each buffer on a separate layer as otherwise it would show the other sites as they are quite close together.

The only way I can think to do this at the moment is to add each layer 20 times, and then query it by each individual site.

James


James Stott BSc (Hons) MSc | Senior Professional
Nicholas Pearson Associates | 30 Brock Street | Bath | BA1 2LN
T: 01225 445548 | M: -
http://www.npaconsult.co.uk/ 

-----Original Message-----
From: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Andreas Neumann
Sent: 15 March 2012 12:10
To: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Plugin to add a layer for each unique value in acolumn

 Hi James,

 And why would you need that? Maybe there is another solution to your 
 problem with just one or fewer layers.

 Andreas

 On Thu, 15 Mar 2012 11:08:04 -0000, James Stott wrote:
> I would like to add a layer for each unique value of a text column in 
> a
> table.
>
> For example, if I have a column called type, and the values in it 
> were
> tree, stone and plant I would like to add a layer for each type. So 
> in
> this example I would have 3 layers.
>
> I know there is a plugin called Shapefile Splitter that splits out to 
> a
> shapefile for each unique value, but I just want it to split to 
> layers
> in QGIS.
>
> James
>
>
> James Stott BSc (Hons) MSc | Senior Professional
> Nicholas Pearson Associates | 30 Brock Street | Bath | BA1 2LN
> T: 01225 445548 | M: -
> http://www.npaconsult.co.uk/
>
>
> 
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 --
 Andreas Neumann
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