When you first start out in the PCB layout game and know just enough to be dangerous, you simply plop down a connector, run a trace or two, and call it a hack. As you learn more about the finer points ...
The plating type is usually immaterial to the footprint geometry but is often incorporated somewhere in the vendor part ...
The 26.5 GHz SMA edge-mount board connector from Samtec is a 50 Ohm RF board connector that terminates directly to the PCB ...