We already have the equipment, the detailed surface scanner, which should be able to plot the following on the planet map - Seismic activity = Geyser/Fumaroles, Geological Find = Minerals, Distress signals = Lifepods, Metallic Debris Detection = Crashed Ship, Radio Signals = Settlement (ANY kind), Unknown Signal = Alien Site/Broken Nav Beacon/Barnacle and so on...
We have landed on planets so remote there should be nothing there apart from Minerals and Seismic activity.
But lets face it, what we have now is a placeholder, we have a surface scanner, but we don't have the mechanics to use them yet.
http://i.imgur.com/MVB7jjf.gif