This is a very basic question - so I apologise in advance...
I have water chemistry data (nitrate etc.) that I wish to display as expanding circles depending on quantity over a map of farmland streams.
All I wish to also do is to also add category data to colour these circles in four different colours depending on the landowner. The final output will be different colour circles (dependent on landowner) in different sizes (dependent on nitrate concentrations).
This - I am sure - is extremely simple, but the videos I have watched so far do not combine the two.
Many thanks in advance!