I am working with a shapefile of a forest, and I want the symbol of each of the trees to reflect their exact diameter.
I have tried to sort this out through the Symbology tab in ArcGIS Desktop 10.3 Symbology > Multiple Attributes (I am displaying species, and whether or not the tree is dead or alive) > Symbol Size > Value: DBH (diameter)
The best I can do is fiddle with the combination of breaks and ranges to get the symbol to be close to the actual diameter. This is far from perfect, and always seems to favor a certain size class (e.g. 100 cm trees are more accurately represented than 10 cm trees).
I am searching for a means of setting the circle symbol diameter based on a specific attribute parameter (in this case, tree diameter). Is this possible?