QGIS - Single outline on multiple adjacent polygons

#qgis #gis
In this video we will see how to create a single overall contour without duplicating the layer but using the expression:
buffer(collect($geometry),0)
🔽 C O N T A T T I 🔽
S I T O 👉 webstorymap.it
F A C E B O O K 👉 / webstorymap
T W I T T E R 👉 / webstorymap
L I N K E D I N 👉 / paolo-brunello-64809028

[@cookie.lover007]

Amazing, grazie mille! That's a very useful trick.

[@WebStoryMap]

Thanks!! Good job with QGIS

[@David_Mash]

categorized value "comune"? "common"?

[@WebStoryMap]

Municipality

[@AkkiKumar-ft1xo]

Sir I was prepared map but I want to keep the label center of each polygon and it not come outside the polygon . It must fit inside that polygon only . Is their any code plzz help me

[@WebStoryMap]

I do not believe that there is a special function to solve your request, the only possibility is to act on the forcing at the centre of the polygon, but on the possibility of adapting the size of the labels, I have not found any answer even by searching in detail on web.

[@AkkiKumar-ft1xo]

Ok sir another problem
I have a polygon layer and it has 3 fields in attribute table ....name ,code,layer . Now i have to show three labels in each polygon and requirement is name is red colour code is blue and layer yellow etc...,
Is it possible

[@WebStoryMap]

@@AkkiKumar-ft1xo You must use Labels ==> Rule-based labeling

[@AkkiKumar-ft1xo]

@@WebStoryMap can u explain the procedure

[@savemybutt]

Where is the narration explaining what you are doing and why you are doing it so beginners can understand the purpose for each step? Very disappointing...

[@WebStoryMap]

This video addresses an advanced function in using QGIS, and both the title, description, and video content explain the final result you want to achieve. What's the missing narration? How to classify a layer? If that's the issue, it's obvious that you need to have at least a basic understanding of QGIS first.