[R] Problems with spatial data for Masterthesis

[Christian Brodbeck]

Hi

I write my masterthesis and don't know how I can count points in a spatial net.

In practical I have a data set for carsharing usage in Berlin. It includes the Idletime of the cars with Long/lat coordinates for the certain places. So if I plot those points I have something like a cloud of points over the area of Berlin. SoMy task is, to find out, in which area of Berlin is the idletime of the carsharing the logest. Therefor I wanted to cluster the innercity of Berlin. I loaded a kml file about the districts of berlin and put the "net" together with the cloud of points. So graphically it works and looks nice. By now I have to find out at wihich district shows the most idletimes. 
Do you know a package/program-codeexample which can handle this problem. In other words which can count the points located in the several districts?
I would be very thankful for your help

Regards

Chris