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I need help formatting an outline on a layer. The problem is that i have a layer with this attribute table: Attribute Table

And the aspect of this layer is like that: Aspect of the layer

What I need is to show an outline not around every "Dicofre", but around the entire layer, i.e. around all "SGRU". Basically I want this but with an outline around all layer: Aspecto of layer #2

I hope I made myself clear. Thanks in advance.

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Do you want it just in the Display, or do you want to make it one polygon in the data as well? – Devdatta Tengshe Dec 7 '12 at 10:34
up vote 3 down vote accepted

You are looking for the dissolve function

enter image description here

enter image description here

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right, that actually works, however it makes me lose too much information :/ – Tiago Brandão Dec 7 '12 at 10:47
Well you are joining everything together. What do you need to do? – Nathan W Dec 7 '12 at 10:47
Sometimes I need to see the information on detail but I can keep the original layer under the dissolved and check it when I need. Thank you very much – Tiago Brandão Dec 7 '12 at 11:28
Well, you can keep the original layer for the information and just use the dissolved one for the visualization. – R.K. Dec 7 '12 at 11:44
Ever tried to do this for Corine Land Cover? It takes AGES. – nickves Dec 7 '12 at 15:58

If you are just looking to display the polygon, and not the actual boundaries between the features, simply go into the Style tab of the layer and either 1) change the outline pattern to no line or 2) make the outline width = 0.

This will give you the polygon as shown above, but retain the feature attributes. Note this this won't truly be the "boundary" of the feature (which I would consider to be a line), but rather the "area" of the feature.

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