Specify a continous query above.
You will see the geographic map of your interest. In addition, for each PlanetLab site, you will see a circle whose size is proportional to the value of the metric you choose. You may click on some site to get more detail results.
The query takes aroung 15 seconds to complete; so the first issue of the query might return empty results (shown by red circles within the map) -- but the subsequent updates will comprise the latest results.