1. A method for predicting evolution of motions of active objects comprising: accessing active object position data stored in a memory device, said active object position data including positioning information of a plurality of individual active objects; and using one or more processors to perform: extracting a plurality of individual active object motions from the active object position data; constructing a motion field using the plurality of individual active object motions; and using the motion field to predict one or more points of convergence at one or more spatial locations that active objects are proceeding towards at a future point in time.