Buffer Tool
❖Using the Buffer tool you can create a buffer of a certain distance around a point. You can do this by using the Fixed Distance tab where you specify the distance to cover(Have Selected Geometries ticked on if you only want to buffer selected points in the layer). Here I will make a buffer of 5KM around a point. Click OK when done and it will do the buffering, then you are prompted to set the properties of the new layer and then click OK:
❖You can also do buffering using the Aggregation Value tab, here you will choose the Layer the aggregation will be done on and on what Column, and then the aggregation Value. What this will basically do is create a buffer of a distance sufficient enough to cover elements in another layer that add up to the aggregation value specified. For example, I will buffer my Depots layer and aggregate on the TOTAL VOLUME column in my Retail Outlets and then choose an aggregation value of 500 000:
The outlets that fall within each buffer add up to 500 000 in total volume.