I was trying to figure out how the estimate of total bitcoin nodes as shown at
http://stats.bitcoin.it/rrd/nodes_total-month.png is created. I am guessing that this comes from the number of addresses that the bitcoin client has seen. Is there a RPC call to get this number?
I realize that this method would be fairly inaccurate at best. So does anyone know how I could go about making a similar graph? Maybe I am way off in my assumption.