3

Here are my polygons of town blocks.

enter image description here

The colored towns are considered as areas where they have the same post code.

What I eventually want is to make seamless polygons where there are no gaps between polygons (please see the screenshot below)

enter image description here

What functions should I use to complete my mission?

5

Pil Kwon, since you have the "same post-code".

In QGIS I can suggest:

Vector > Geoprocessing Tools > Convex Hull

Hint: Create convex hulls based on a field.

Reference:

  • 1
    right. Convex Hull! I couldn't think of it but thanks a lot! – Pil Kwon Aug 27 '18 at 5:19
  • @Pil Kwon, you are always welcome! – Taras Aug 27 '18 at 5:24

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