[Qgis-user] advice needed - merge attributes

[Andreas Neumann]

Hi,

This should work.

After selecting and merging the polygons a table should pop up where you
can select for each polygon the new attributes it should get. You can:

* select one individual polygons attributes to be used or
* min
* max
* mean
* average

However, I see that sum is not offered. Would you need the sum function?

If yes, this should be rather easy to implement.

Andreas


On 09/16/2011 04:08 PM, David wrote:
> Hi everyone,
> On a shapefile, given to me by the person who created it, I need to merge some polygons to make larger units.    For example, select four adjacent polygons and use the merge tool and you get one large polygon.   Great.   However, on the attributes table what seems to happen is that instead of combining the various values (size, perimeter etc) three of the four polygons have disappeared leaving just one with its original data unchanged.   Would some kind person tell me what I'm doing wrong?
> Thanks in advance.
> David Asquith
> UK
> 
> 
> 
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